ok i know that 12at have low compressions , i think i want to do a supercharged 12a .but i was wondering to get more boost u need low compression rotors .hhmmm now where can u get low compression 12a rotors, do i have to a buy a 12at and get it from there but thats freakin stupid. soo any shops out there sell these low compression rotors?

 

You'd have to have some custom made otherwise its not happening... sorry

Source of info: http://www.mazdatrix.com/faq/rotorwgt.htm

 

You don't need low-comp rotors to super or turbo, you just have to run lower boost and do your turbo/super setup *properly*.

Ask any of the turbo or super guys here.

You're just fighting detonation, 'tis all. With higher comp rotors you have to run lower boost and make sure you have a good intercooler.

Turbo guys? a little help?

Jon

 

Didn't mean to imply that you cannot turbo on regular compression rotors... jsut that you won't find low compression rotors for you 12A, unless I suppose the JDM 12A turbo motor ran different rotors. You can turbo any engine you just have to be careful on the tuning. Tuning makes all the difference.

 

all i want is that the rotor can take a durable 14-16 psi because the 7 inch camden only puts out 7psi , and from what i hear it doesnt put out alot of hp .thats why i want more boost for more power. i would go turbo because its cheaper but man i rather be different u know what i mean.

 

well, i have been hitting 18psi on my setup... and it's been rediculous.. boost creep is not your friend! i just finished porting my wastegate again... this time with a new door and everything. i'll be running 14psi with this turbo, but when i upgrade i'll most likely stay around 16 or 17psi... maybe 20 with the meth/water injection. oh and i have stock 12a high compression

 

man thats alot of psi and u have high comp rotors. since ur running on stock rotors how is the durability on it . ever blow an engine yet with those numbers?

 

If you would have done a search....

You would know that I PERSONALLY know of several 12A powered,
Turbo 1st gens, running 22PSI on pump gas - for YEARS.

It's all in the tuning.

Anybody can Tune a Fish.
Not Anybody can Tune a Piano.

 

Just because they're not listed on that chart doesn't mean they don't exist. 12ATurbo rotors are low compression.

 

REVHED I corrected myself...

" I suppose the JDM 12A turbo motor ran different rotors"

 

soo directfreak ur telling me its ok for my stock rotors to take that much psi? rite

 

JDM 12AT runs different rotorhousings too With bigger exhaust ports and oil injection ports pre-threaded into the housings.

 

Dude - Forget boost, and and just get a carb and headers. Learn to
walk before for try out for a track team. I am sorry to sound this way,
but it seems you need to seek ALOT of knowledge on the subject before
even considering something of the sort.

 

hey every1 how much is a 12at turbo stock anyway?

 

about 950 . i think corsport sells them if im right

 

that's if you can find them. they are getting very rare. but its not worth it. they are usually worn out and in need of a rebuild anyways.

directfreak is 110% right. there are lots of guys running in excess of 20psi on stock high comp 12a's. tuning isn't just some word thrown around that makes us sound like we know what we're talking about. it's something you gain from experience and being in the game a long time. you need to seriously do some research. i have been building this turbo 12a setup for over a year and a half. gone thru 4 different carb setups and two different turbo setups. it's finally running bad ***... probably could have had it right a year ago but i'm on my own with this here. (except for the amazing help from this forum ) so as i say, i've watched and been a part of the tuning of many turbo FC's here and i know what it takes to run higher boost. it CAN be done and with GREAT SUCCESS BUT BUT BUT, if you plan on just boosting it and not thinking about intake temps, underhood temps, egts, afr's, etc... and don't even really know what any of that should be at... or even how to open your carb of choice and adjust the jets, air bleeds, emulsion tubes, etc... then you should maybe start with a header and full exhaust i just dont want to see another 12a go boom. i'm not saying you dont know anything... but you really need to research A L O T. it seems soooo much easier than it really is. good luck.. i am here to answer any questions you have. the more you ask, the more you know.

 

Crap man, I just basically learned how to properly rebuild a nikki this year!

Tuning takes a lot of time, patience and knowledge. At least, to do it right on a rotary with little or no ability to take it a the local "expert" it does. With hondas you can find people who can tune you anywhere, they're a dime a dozen.

What are your plans for the car? How much money and time are you willing to invest in the project? Do you understand the magnitude of a turbo or supercharged 12a project?

If you've been tweaking/tuning rotaries for years, then I apologize. But it seems to me that the best route would be to start simple and work your way up. Learn to tune air/fuel ratios with a simple carb first. Primary and secondary jets, air bleeds, emulsion tubes... you'll need to know it all for a turbo'd carb setup, so you might as well learn now on something like a Sterling Carb and get some extra power out of your stock setup while you do it. You'll need to upgrade your stock fuel system anyway, and your exhaust too if you want to go forced induction later on. You can get started on that now with a carbed system.

Then you can start worrying about tuning a turbo setup.

BUT, if you wanna jump right in (and who doesn't), then you should do many searches, read up as much as you can, and make good friends with Dan Atkins . He not only supplies Camden Superchargers, but he also runs Atkins Rotary, and is an active poster on the forum. He can set you up with a sweet turbo setup. It won't be cheap, but it'll rock.

Jon

 

thanks for the mucho info guys,ive only had my rx7 for half a year i was goin to get an fc but fell in love with the fbs. its really me and my bros project car hes a mechanic but works on piston cars never really on rotoraries. i to have a mr2 supercharged that has a 91 jdm engine we dropped in it but i have lost intrest in it so im planing tp either sell it or give to my old pops. ill keep doing more researches to gain more knowledge ,but supercharging my fb is the goal in the future .

 

Sorry for highjacking the thread but I'm thinking of building a turbo motor(in the distant future).

Is there any books out there about boosting a 12a/13b, as has been state knowlage is power and if I can find a book or two I'm thinking that its a good time to start learning.

=Eric

 

not rotary specific, but a great book to most definately read is Turbochargers (i think) by corky bell? yea something like that. it's been a year or so since i've read it but it will learn ya somethin

 

^agreed. I bought my vert stock, read up for a bout 7months on just about everything while saving up for a turbo swap and I had everything I needed to know. Do simple mods first if you want alittle more speed, read and search your *** off, then give it a shot. One thing I can tell you, GO BUY Corkey Bells book "Maximum Boost" $23 on Amazon, it's the best/cheapest investment you can ever buy.

 

go to www.ausrotary.com lots of guys have 12a Turbos.. some actual 12at others just std 12a's which they slap turbos on. As was said before, its all in the tune and how well you built it.

-James

 

You might want to research that Camden more as well. There are engine bay heat issues, and tuning problems unique to the charger from what I understand.

 

What about Turbochargers by Hugh MacInnes? Would that be good reading along with Maximum Boost? they have it as a combo on Amazon.

=Eric

 

yeaaa maximum boost! THATS what i was thinking of. arggg. definately read the corky bell book. that guy is the god of boost!