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| 1. |
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How much are
your apex seals? |
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Apex
seals are 36.75 a peice or $220.50 for a set. They can be purchased
from our online store or you can give us a call. We ship daily via UPS and
can do COD or credit cards. |
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| 2. |
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I am writing
a paper on rotary vs. piston engines, what is a good website for general
information? |
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A great tech site
is www.monito.com |
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| 3. |
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I am swapping
an automatic engine with a manual one, should I change the counterweight
or should I leave it be? |
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To ensure the safety
of the engine balance you would need to change the engine flywheel to a
light weight steel flywheel or change the front counter weight and the flywheel
for the engine that you are using - ie 79-80 automatic would need 79-80
front weight & rear flywheel, the year of the car that the engine is going
into is not the factor but the engine itself is the factor for the balance. |
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| 4. |
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Should I replace
my bearings at 100,000 miles? |
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It depends on the wear,
if they are copper in color then yes you would need to replace them. New
bearings
are a cheap way to ensure a longer lasting engine. |
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| 5. |
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My rx7 over
pressurizes and/or bubbles into the overflow, how can I fix this? |
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When ever the cooling
system gets over pressurized the combustion chamber is leaking into the
cooling system. This has happened either by overheating and melting a water
jacket seal or by electrolysis which is caused from the antifreeze turning
into an acid and eating away at the rotor
housings. The only fix is rebuilding the engine, driving the car in
this condition will not cause further damage but its not going to get any
better and will most likely be emmiting white smoke. We have rebuilt
engines in stock or you could rebuild the engine yourself using our
dvd
and one of our rebuild
kits. |
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| 6. |
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After my car
has warmed up the RPMs keep bouncing up and down, what is wrong?
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You probably need a
new BAC valve which is located on the upper dynamic chamber on you're intake
manifold. You might also need a new Throttle Position Sensor. |
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| 7. |
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Do you know
how much it costs to install an engine? |
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We no longer do installations,
but I can refer you to a couple of local places. We also have a nation wide
network that I can help you out with I would need your city and state to
help you out, give us a call at 253-848-7776. |
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| 8. |
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When my rx7
gets hot or warmed up I think transmission starts slipping especially going
up hills. Is there anything else it could be? |
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As far as the transmission
slipping you might consider changing the transmission fluid as this is a
very neglected area of service, and can cause some weird problems. |
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| 9. |
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I think I have
a carbon locked engine, what should I do? |
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The throttle body is
located on top of the engine and there are 3 or 4 nut caps that hold on
a black hose that runs from the air cleaner box. When you remove the green
fuse (86-88) from the fuse block by the front drivers side strut tower,
it disables the ignition system and the fuel injection system so no more
fuel is introduced into the engine. Remove the spark plugs, disable the
ignition, and while spraying the power foam into the engine have some one
crank on the engine so the foam will get into all of the chambers. Do not
remove the top plugs unless you are unable to get the engine to turn over.
The reverse engine treatment does not remove the carbon as well as the power
foam and is a procedure that is done by the Mazda Dealers.
Carbon is a result of the combustion process in the rotary engine. If poor
fuel, spark plugs or wires are bad etc. - excessive build up can happen,
and cause problems. In long storage the carbon dries up and flakes off.
Some times this will jam the seals in a no compression state. The local
dealer will use a reverse starter on the engine to try and free it - if
it doesn't work you need an engine. When we ran our auto shop we found a
better way but sometimes would take awhile. Get some AMSOIL Power foam.
Its an engine degreaser and carb cleaner. Spray this in the carb, and in
Both TOP spark plug holes. Let sit a day and try with a breaker bar to move
it. You may need to repeat the process several times- just get it to move
a little bit each time. You will need to change the spark plugs - be sure
to Use NGK BR8EQ-14. Be sure to have a strong battery, and once the car
is started keep it running (lots of smoke will result due to the chemicals
used but it will not hurt the catalytic converters). I would also suggest
on your first drive to keep the RPMS up around 4-5,000 RPM to help blow
everything out. Follow up with a gas treatment of BG
44K fuel injection cleaner (OK to use in Carb applications, as it will
clean any residue from the tank to the engine, and help remove any remaining
carbon) It is OK to use the 44K
every 6 months to keep the carbon build up to a minimum. |
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| 10. |
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Should I use
premium or regular gasoline? |
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For a turbo you should
use 91 octane in order to avoid pinging/detonation/spark knock, etc. A good
87 octane that has a chemical additive for cleaner burning is fine for non-turbo.
The Rx8 needs to run premium gas because the compression ratio is so high. |
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| 11. |
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What does your
"Mild Street porting" do for performance, drivability, and horsepower? |
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It gives you approximately
20% more horsepower without any significant problems in drivability. |
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| 12. |
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What are race
bearings, and what do they give you? |
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Race
bearings are for the rotors and they are needed in any engine application
that is expected to exceed 9,000+ RPM. |
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| 13. |
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What are Clearance
Rotors, and what do they do? |
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Clearanced rotors are
used for high load engines, with high RPM, high boost, or high nitrous use.
They allow for more oil flow and prevents the rotors from banging against
the cast irons. |
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14. |
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What are 3mm
apex seals, and how are they different from the regular 2mm seals? Are they
already installed on the 13B turbo engine? |
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The 3mm
apex seals are 1mm wider than the 2mm
apex seals and some people say they allow for higher RPM and boost.
Typically 3mm apex seals are used when 2mm rotors are no longer within spec
and their is to much space between the rotor and the apex seal. Cutting
the rotors to accept 3mm seals makes the rotor like new again with the proper
amount of clearance between the rotor and the seal (0.002" - 0.0035",
Limit = 0.0059"). |
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| 15. |
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My engine is
running around 300hp, which clutch would you recommend? |
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You would either want
our HP clutch for $225.00 or our center force dual friction clutch kit for
$325.00, both kits contain the disc, pressure plate, throw out bearing and
pilot bearing seal. |
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| 16. |
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What sort of
oil should I use synthetic or petroleum based? What weight, and how long
does it take the engine to break in?
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You should not use
any synthetics while breaking in the engine for the first 6,000 miles and
keep the engine under 4,000 RPM for 1,000 miles. After that we recommend
Ams-Oil, as this is the one we have done the most testing with and have
been very happy with the results. A 20W-50 should be used in the summer
and a 5W-30 or 10W-30 should be used in the winter. |
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| 17. |
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I heard that
a steel 10 pound flywheel is the best for street use, is that right? |
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We do not recommend
light weight flywheels for anything other than racing applications where
you need to get high RPMs quickly, as it can wear out the clutch quickly. |
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| 18. |
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Can you install
a lightweight flywheel for me? |
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We can put a lightweight
flywheel on for you if we are rebuilding your engine for you. |
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| 19. |
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Can I use a
rotor with worn out tolerances? |
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These apex
seals were broken because they were installed in rotors that were out
of tolerance. The apex groove in the rotor is very critical. The tolerance
between the apex seal and the apex groove is (0.002" - 0.0035",
Limit = 0.0059") For turbo applications the tolerance should be closer
to .002 - .004"to resist the higher detonation probability inherent
in this application. If it were to be any more than .006", it would
dramatically increase the possiblity of apex seal damage, as shown in the
example above. |
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| 20. |
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Do you replace
bearings on your rebuilds? |
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Atkin's Rotary replaces
bearings
in rebuilds on an as needed basis. |
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| 21. |
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Are parts such
as ignition, computer, fuel pump, throttle sensor, etc. worth replacing
at the same time as a engine rebuild? |
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Not really just change
the items as needed such as belts, hoses, wires plugs, etc. |
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| 22. |
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Is it good
to let a turbo engine run for a bit before shutting it off? |
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Yes, anytime you drive
a turbo engine, you need to wait at least 5 minutes to allow the oil feeding
the turbos to cool everything down in order to prevent oil from being baked
on causing you to need an early rebuild. If you have a tendancy to forget
this then there are some really good turbo timers available, and are worth
their weight in gold. |
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| 23. |
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How accurate
you can get the flow characteristics with just a porting template. |
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The porting templates
are a begining for the porting but does not show everything you need to
do as some of it is a form of art work and experience. We have been porting
engines for 26 years (opened in Nov 1982) |
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| 24. |
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Is there a
good manual for removing and installing an engine? |
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The best manual on
the market is the factory
workshop manual approximatly $80.00+ shipping. |
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| 25. |
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Can I use either
fuel injection or a carburetor with a supercharger? |
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The carburetor works
better with the supercharger
and is less expensive than fuel
injection, while fuel injection is more expensive and easier programmed
by computer. |
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| 26. |
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I have 13B
and I want to put it in a Volkswagen bug I want a carburetor what do I have
to change? |
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Depending on the year
you will need the following:
1 - Webber or Holley carburetor kit
2 - Rotary Engine Automatic Tranny counterweight
3 - Kennedy Adapter(flywheel,trans adapter)
4 - VW Clutch=throwout bearing,disc,press plate
5 - 6 Volt VW starter
6 - 6 Volt starter bushing
7 - Bolts and nuts for Mazda flywheel,VW clutch,
8 - VW engine to tranny nuts and bolts
9 - Crossmember for front mount on Rotary engine
10 - Custom exhaust piping and muffler(flange from Mazdatrix and stainless
exhaust pipe,Magnaflow muffler(must use stainless tubing due to high(2000
degrees) exhaust temp.Mufflers and routing your choice.Mine curves under
the tranny and comes out under right rear fender.
11 - Custom piping for water to and from radiator(muffler shop ran mine)
12 - Hoses from radiator and engine to water pipes
13 - Radiator(I used a Mazda 3-row radiator from a RX-7 that had a Auto
tranny)mounted in the front with vent where super beatle louvers used to
be.
14 - Fabricate throttle linkage
15 - Wiring -from VW to Mazda(Use two manuals-VW and Mazda and just hook
it up)
16 - Gas line hookup(Mazda style carbs use a return line-I used stock VW
gas line for return and ran new 5/16 steel gas tubing under car along pan
bolts-schools out on need for return line-you decide)
17 - Optional at extra cost=Modified carbs,special muffler,MSD ignition,Turbos,fuel
injection,etc=how much money you want to spend ?
18 - Transmission=I used the stock tranny,cause its what I had.Choices are
many: Type 1 bug,Type 2 bus,Porche etc.
19 - Oil cooler (Rotaries must use a oil cooler, you're choice on what cooler
and where to mount.)
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| 27. |
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I smell fuel
while the engine is running, what is wrong? |
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The most common problem
is a fuel pulsation damper. It has a tendency to leak and can cause a fire.
We have the part in stock (N350-13-150). |
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| 28. |
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Do you rebuild
imported J Spec engines? |
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Yes, we can rebuild
them. |
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| 29. |
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Do you offer
upgrades in your rebuilds, such as 93-95 corner seal springs? |
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Yes, we offer upgrades
in our rebuilds. Call for pricing at 253-848-7776. |
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| 30. |
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What do you
charge for a 20B rotary engine? |
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$4500.00 for a used
engine and $6500.00 for a rebuilt unit. Please note that not all engines
have complete intake and exhaust components. And only complete front clips
have the computers. |
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| 31. |
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Where can I
find Amsoil Products? |
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We now offer Amsoil
Products. Please check our web site or give us a call at (253)-848-7776. |
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| 32. |
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How can I prevent
carbon lock? |
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1) Never shut the
car off before the idle drops off of the enrichment system. (choke)
2) Do tune ups every 10-12,000 miles and only use NGK spark plugs - change
the air & fuel filters at this time.
3) Use the BG
44K fuel injection cleaner every 4-6 months (more if all city driving
or just short distances- less if mostly freeway miles)
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| 33. |
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How do I know
if I need to replace my engine do to overheating? |
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There are a couple
of things to determine if the engine has been overheated to a point of needing
replacement. 1. Is coolant in the over flow jug steaming or bubbling? 2.
Check the plugs to see if antifreeze is on them - green goo or sweet taste
(if you are that daring) 3. If you have access to a 4 gas analyzer have
them seal off the over flow jug and see what the gases are in the jug. If
any readings are there then it is definite. to check why overheating. 1.
I will assume that you took care of the radiator. 2. when was the last time
the thermostat was changed? did you use a Mazda one? 3. to check for location
of heat build up use an inferred heat light and see where a significant
increase is at - across the radiator - water pump - thermostat- To check
for a leak the easiest way is to use an ultra violet dye and a special light
- the dye will seep any where there is a leak and show up under the ultra
violet light as glowing. |
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| 34. |
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What does the
thermal pellet do? |
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The factory thermal
pellet acts like a thermostat for the oil system. When the oil is cold it
does not allow full flow to the rotors for cooling, only enough for the
bearings. As the oil warms up it allows more & more oil to flow. When this
fails, it does so in the cold mode, thus not allowing oil to fully flow
to the rotors, which overheats them and causes damage to the oil control
rings. When the factory thermal pellet starts going out the thing clients
comment on the most is excessive oil smoke at start up, which tends to go
away as the car warms up and the catalytic conerter cleans up the exhaust.
Some people even notice the oil pressure being slightly lower. Our replacement
pellet keeps the engine oil in warm mode so that oil is always flowing to
the shaft thus fixing the problem of the faulty factory thermal pellet. |
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| 35. |
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How can fuel
get into the engine? |
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There are very few
ways that fuel can get into the engine.
A). Hung open or leaking injectors.
B) A sensor causing wrong information being sent to the injector allowing
it to stay on too long.
Most of our experience has been the injectors as fuel can get pretty nasty.
Try running some 44K
thru the system, its an expensive additive but we have seen some great results. |
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| 36. |
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Is it safe
to put oil in the tank when I fill up my car? |
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This is only good for
race cars as it will damage the catalytic converter. |
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| 37. |
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I must hold
the rpm's at 3700 or higher to keep it from stalling, what is wrong? |
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Your fuel pressure
may be to high, or something may be holding the secondary open such as a
piece of dirt or debris. |
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| 38. |
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What should
my compression test read? |
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Here is a scale that
shows compression pressure vs. cranking speed.
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| 39. |
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Do you have
a single rotor engine ready for use? |
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Our 1 rotor engine
is ready for use and it is has 100 HP. |
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| 40. |
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Do your rebuild
kits include your 2 piece apex seals or original Mazda? |
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They include our 2
piece apex seals and your choice of 2mm or 3mm if 86 and newer. |
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| 41. |
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Why is water
shooting out of my exhaust? |
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If you are shooting
water out of you're exhaust you probably have a melted water jacket seal
and/or possibly a damaged rotor
housing. I would suggest starting with a rebuild
kit and our dvd
if you wish to rebuild this. Be prepared to purchase a rotor housing, as
you have a good chance of needing it. Or you can purchase a rebuilt
engine. |
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| 42. |
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Who pays for
shipping? |
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You would pay for shipping
to you and we would pay for the return. |
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| 43. |
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Is it possible
to convert a rotary engine to air-cooled? |
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No it is not possible
to convert the rotary to air cooled as some of the engine cooling passages
are in the engine need to be cooled via water - antifreeze compound. |
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| 44. |
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What kind of
HP are you seeing with a street 20B? |
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20Bs put out about
320HP stock, but are capable of much more. |
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| 45. |
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What kind of
vehicle did the 3 rotor come from? |
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This came in the unos
Cosmo that was offered in Japan and Australia. |
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| 46. |
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What is a core
charge? |
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It is a price that
is tacked on to the overall price of our engine that you will be refunded
when we receive you're engine, depending on what shape your core is in,
for more on core returns please see our engine
page. |
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| 47. |
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How much do
you're one rotors weigh? |
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Our one rotors weigh
220 lbs, more information on our one rotor can be found here. |
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| 48. |
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What is the
firing order and how should the wires be hooked up? |
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Number one chamber
is the one closest to the distributor or crank angle sensor, number two
is closest to the firewall. T is top and trailing, L is lower and leading.
On the distributor cap the holes are marked L1-L2 etc. |
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| 49. |
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I tried to
start my car and it just went click, click, what's wrong besides the battery
or starter? |
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It is possible
to have a carbon lock problem. Lets start with the solutions then we will
talk about the reasons.
A) Spray some Ams-Oil Power foam down the throttle body and remove the 2
top spark plugs and spray this in the spark plug holes. You may need to
leave this sit over night for best results.
B) With a pry bar, rotate the engine backwards prying on the flywheel. You
can access this through the inspection plate. you may need to repeat this
in order for this to break free. rotating backwards then forward after adding
more of the spray. Only spray for 3-5 seconds, as more is not always best.
C) Before actually starting / but after getting this fretted up, you should
change the spark plugs to NGK brand ONLY.
D) After starting do not shut the engine down until the engine has dropped
off of the fuel enrichment mode (fancy name for choke)
Now what causes this.
A) Poor fuel quality / or premium fuel in a non turbo. Premium fuel is now
designed for slowing the burn process in turbo or supercharger applications
to prevent pinging or pre-detonation.
B) Spark plugs - Wrong type, inferior brand, or worn out. Mazda advises
under optimum conditions changing the spark plugs every 20 thousand miles.
In Our experience in the auto service, the real miles that was combined
with city and freeway driving was 15,000.
C) Check the spark plug cables - use NGK or higher quality that are form
fitted - when in doubt see the Mazda Dealer. If the wires are breaking down
it will not send enough energy to the spark plugs to burn the fuel cleanly.
This is known as a carbon lock. When you flood the car, carbon on the rotors
gets washed off, in some cases like this it actually jams the apex seals
so that they can not move freely over the protruding areas in the rotor
housings and locks it up. In other instances it keeps the apex seals jammed
in so that it freely turns but does not make contact with the rotor housings
causing what is known as "no compression" carbon lock.
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| 50. |
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How much does
your rebuild video/dvd cost? |
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$25, and can be found
here. |
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| 51. |
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What is included
in you're rebuild kits? |
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A breakdown of our
different rebuild kits with prices can be found here. |
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| 52. |
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How do I correctly
align my crank angle sensor? |
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A) Turn the eccentric
shaft until the top mark (yellow) is aligned with the indicator pin.
B) Apply engine oil to the O ring (if replacing) and install it on the crank
angle sensor.
C) Apply engine oil to the drive gear.
D) Match the matching mark and the crank angle sensor on the front cover.
Tightening torque 65-95 in - LB as per Mazda.
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| 53. |
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What are the
difference between you're oil rings and Mazda's oil rings? |
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Ours are solid viton,
so it can handle higher temps while Mazda's is a silicone base with a viton
coating. They can be found here. |
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| 54. |
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Do you or can
you resurface rotor housings? |
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We do not resurface
housings, because when grinding the housings you need to keep in mind that
the surface has a thin layer of nitrating, which is a hardening process.
This layer is taken off during machining and the life expectancy is very
low after that. Next it is hard to get the mirror finish you need for the
oil control rings, so the engine can end up smoking. |
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| 55. |
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My car is smoking
a lot, what is the problem? |
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In the rotary engine
the oil is not only used as a lubricant but also for cooling the shaft and
rotors. When the oil gets to 3 quarts the oil has a hard time taking all
of the heat away from these area's and getting cooled down when passing
through the oil cooler. At 2 quarts remaining the oil can actually start
to break down, and not provide the lubrication to the bearings. This is
when the power starts to go away. Since the rotors can not get enough oil
to keep them cool with low oil, the oil O rings on the face of the rotor
get damaged to the point that they can not hold back full pressure and lets
oil leak by, and it burns in the combustion chamber, resulting in excessive
smoke. At this time you have 2 choices, Purchase a rebuilt
engine or purchase a rebuild
kit. |
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| 56. |
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Will porting
shorten the life of the motor? |
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In most cases under
normal driving conditions the street porting and polishing will not shorten
the life of the engine. |
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| 57. |
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Can you put
a turbo engine in a non-turbo car? |
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Yes, but you would
need to make changes to the computer and the exhaust system. The flywheel
on the turbo engine wont fit the non-turbo tranny, then you would need the
turbo driveline, third member, and axels. You basicly need a turbo donor
car and it is a huge process. Or you could try one of these.
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| 58. |
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Will a 13B
motor bolt up to a transmission in a car that has a 12a motor in it? |
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Yes the 13b will bolt
up to the transmission but depending on the year you may need to change
the Front cover and slightly modify the mounts in order to install the 13B
engine in a 12A chassis. |
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| 59. |
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What exactly
does the core need to include? Should I include intake manifolds, etc? |
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The core only needs
to consist of a bare block. Everything needs to be removed including waterpump,
oil pan, intake, exhaust manifolds etc. If we receive a core engine with
this stuff still installed we may charge you labor for removing it. |
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Should I use
the one piece or the two piece apex seals? |
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It depends on the
application, for racing the one pieces are better suited, while for street
driving the two
piece apex seals would be better. The reason is that one piece apex
seals need to be cut down a little more to allow for more heat which will
make it a little hard to start and annoying for street applications. In
addition some people forget to cut them down and then when they expand from
heat in the engine it can cause guaging on the cast irons. |
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| 61. |
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How many pieces
in you're rebuilds are new and how many are used? |
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A stock engine
has all new apex
seals, rotor
housings are used as long as they do not have chips, or damage as described
in the Mazda Manual. All new springs, side seals, oil control rings, and
seals. |
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| 62. |
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What kind of
tests are done to your engines before they are shipped? |
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Each engine is compression
checked and must have a 8.5 or higher (most are in the 9's & 10's) on
a Mazda compression checker. Then it is pressured
tested for any possible coolant leaks into the engine, if it passes
this stage, the openings are taped and the engine is ready to ship. The
engine compression readings are marked on the lower portion of the rotor
housings. We also keep an engine build sheet on each engine, showing
the parts replaced and the compression readings and the engine builders
name and specifications. |
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| 63. |
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What options
do you offer to improve performance and reliability? |
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86+ cars have a known
problem with the thermal pellet, all of our engines have the Atkins replacement
that prevents this from being a problem. Most people that just want a little
more power with out hurting the emissions, or derivability opt for a street
port & polish. This can increase your performance up to 20%. The only draw
back is if you have a lead foot your gas mileage will suffer. Most people
enjoy this performance. If you ever opt to go for the Racing Beat streetable
exhaust, it will perform better, with the porting. |
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| 64. |
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How can I identify
the different type of injectors |
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They are color coded,
see this page for the specifications. Fuel
Injector Identification |
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| 65. |
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My oil pressure
fluctuates while im driving down the road holding constant rpm, whats wrong? |
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You could need a new
thermal pellet or it could possibly be nothing more than a bad ground or
soldering joint on your gauge. ie. you turn the radio on and pressure changes
or you lose power. |
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| 66. |
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What is the
price and reduction ratio to David Atkins gear driven psru in his airplane? |
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The price is $6500.00
and the ratio is 2.29:1. |
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| 67. |
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I want to use
a different year of rotors in my engine, what do I need to do? |
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You would need the
new rotors as well as new front counterweight and rear counterweight/flywheel
to correspond with the new rotors. |
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| 68. |
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Is it ok to
run my motor without a thermostat? |
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Running the engine
without a thermostat will kill it quickly. Without the thermostat the water
in the cooling system never leaves the engine to go to the radiator for
cooling. So you are slowly melting the seals and in sever cases warping
the rotor housings. Im some piston engines you can get away with out the
thermostat... |
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| 69. |
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How much does
a one rotor eccentric shaft cost? |
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Since you need the
whole rotating assembly balanced, we generally only sell the whole balanced
rotating assembly for the one rotors, they go for about $1175.00, this includes
the eccentric shaft, rotor, front & rear weights, and the balancing
service. More Information can be found here |
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| 70. |
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How long is
your rotary rebuild video? |
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Approximately one hour
long. |
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| 71. |
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Why does the
renesis engine produce more horsepower than the rx7 engine? |
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The rx8 makes more
horsepower than the rx7 mainly because it has larger ports than the rx7.
To make the same horsepower with a 13B engine you simply need to port and
polish it and the power will be equivalent. |
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| 72. |
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Why is the
renesis engine lighter weight than an rx7 engine? |
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The renesis engine
is not lighter than a 13B engine. This was a rumor started before the renesis
came out but has since been found to be false. |
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| 73. |
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Why cant i
put boost on my renesis engine? |
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The biggest reason
is that the engine compression ratio is way to high at 10:1. Another reason
is that the apex seals just arent built to accept boost. People have had
some luck with low boost at around 6psi, however any mistuning at all can
lead to detonation and apex failure. |
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| 74. |
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Whats up with
the teflon encapsulated water jacket seals? |
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The teflon encapsulated
water jacket seals were not designed with the rotary engine in mind. They are too big for
the water jacket groove and can cause the cast iron to break because they
are too large. We have also seen and heard complaints from customers that
upon tearing an engine down with these installed after only a few miles
that they fray and are no longer useable. This is why we suggest using stock
Mazda waterjacket seals, they were designed for the rotary engine, and work
well. |
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