Ok I was wanting to put a turbo on my 1983 rx7. It has a 12a and I was wondering If a manifold form a 86 would fit. Or how do I make that work.

 

personally i'd just find a wrecked FC turbo II and swap engines....easier

 

no. 13b manifold will not fit 12a. T2 swap is the best way.

 

So The 13b turbo is my best bet. Will the engine bolt right up to the transmission and stock mounts or is there a kit.

 

turbo can be put on the 12a but with the higher comp rotors, u wont be able to run more than 8 psi. then there's boost prepping the nikki carb, drill and tapping the front cover for the oil return. and probably other things i'm not aware of. the t2 engine uses a larger flywheel so u'd need to also use the tranny. 13b is slightly longer than the 12a so u'd need to mod or get from RB and probably mazdatrix the front mount they sell to put a 13b in a 12a frame. u'd also need the 12a front cover for the t2 engine. pm bad83. he can give better advice than i can since he's done this.

 

Ok Ill pm him thinks for the help.

 

I'd like to know why one can't run more then 8 PSI on high compression rotors. That's news to me...

Here's the thing. If you want to turbo the 12A, you're looking at making your own parts to do it. You'll need to make your own exhaust manifold and then either adapt the 12A intake to a throttle body (so you can run EFI because boosted carbs are a world of pain) or go to an aftermarket intake for something like a Weber and run ITBs.

Generally speaking, unless you are into fabrication, swapping in a turbo 13B is easier.

It bolts directly to the 12A transmission if you swap the flywheel from the 12A. But you may overpower the transmission if you can keep traction.

You'll need a GSL-SE oil pan, and the 12A front cover will have to go onto the 13B. You'll also need a GSL-SE 13B front crossmember. The front cover will need to be modified for the oil drain from the turbo.

You can use all 2nd gen electronics if you just want to run stock boost, or go to a standalone if you want to upgrade. You'll need a high pressure EFI fuel pump as well.

 

that's just something i've always thought due to the higher risk of detonation. but then again, sam(bad83) has got like 15psi on 9.4 rotors.

 

Ok is the 13b the best swap for the car I like to keep it rotary powered of course. But is there something more powerful.

 

With engine management and a proper tune, there is no 8 PSI limit. Even 10 years ago I was running 12 PSI on the HT-18 on a stock 6 port block with just an S-AFC and a stock NA ECU. Since 2007 my "daily driver" boost setting on the same block (with a bridgeport and stock S4 NA 9.4:1 rotors) is 13 PSI from a GT4088R. The "fun" setting is 16 PSI, right around 500 RWHP.

"Best" depends entirely on your point of view. If you would like to keep it rotary, then a standard 2nd gen 13B swap is probably the best way to go for you. The 13B-REW from the FD is a little more advanced and desirable when you get to higher (above 500HP) power levels. There is also the 20B 3 rotor, but that is a whole other discussion in terms of complexity.