1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

FB Engine Swap options

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Old Apr 16, 2013 | 06:51 PM
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Talking FB Engine Swap options

I currently purchased myself another FB as my old one died in a crash I do however have the 12a from the car and parts 12a that is trouble from the new car.

I am currently weighing up my options for an engine swap. My father and brother are both machinists/mechanics so my options are open.

I was thinking of a N/A 20b at first but it seems the parts and accessories may be out of my budget (3-5k) I have seen some nice 86-92 turbo 2 motors for 1200-1300, what is difference between the years? (s4-s5?) What works better for this swap?

Also I have seen the REW's from the third gens for slightly more, Is there any added trouble over the T2 swap?

An N/A triple 12a would be sweet too, we have a Cnc lathe so if someone was to present me with a build thread and the eccentric shaft schematics this could be an option too?

Anyhow I have read the T2 swap guide and was wondering what everyone's opinions are, Looking forward to the build! If a someone could do a comparison between the swaps or even a parts list I would near soil my britches..
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Old Apr 16, 2013 | 07:03 PM
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if your gona be doing custom cnc e shafts why do a 18a when you could do a 22A dont think anyones ever done one of them.
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Old Apr 16, 2013 | 07:14 PM
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I'd like to see a 5 rotor.
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Old Apr 16, 2013 | 07:16 PM
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Structural integrity comes to mind.. But I'm sure both are near equally challenging... I was mearly throwing it out there as in option. I will put the time in if necessary, but a quick ride for the fall would be nice too!
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Old Apr 16, 2013 | 07:26 PM
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its supposed to do that
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Build a 12a bridgey, or PP and drive it... then grin...


Isaac
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Old Apr 16, 2013 | 07:58 PM
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...Then I wouldn't even be able to drive off a cliff after my engine blows...
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Old Apr 16, 2013 | 08:00 PM
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How does the 12A and carb deal with boost and Bridge/PP? Also what should be considered when rebuilding a 12a, a complete rebuild kit or just partials?
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Old Apr 16, 2013 | 08:15 PM
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Originally Posted by nff
if your gona be doing custom cnc e shafts why do a 18a when you could do a 22A dont think anyones ever done one of them.
Scoot did a few years ago, Complete ENGINE
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Old Apr 16, 2013 | 08:27 PM
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Renesis engine!!!!
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Old Apr 16, 2013 | 09:15 PM
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premix, for f's sake
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im still waiting for someone with excess cash monies to build an all out "anything" rotary, using RB's aluminum end plates + GURU racing E-shaft
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Old Apr 21, 2013 | 05:25 PM
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boys! Im gonna go find myself the 12a rebuild thread, thanks a lot..
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Old Apr 21, 2013 | 05:56 PM
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Originally Posted by Sgt.Stinkfist
im still waiting for someone with excess cash monies to build an all out "anything" rotary, using RB's aluminum end plates + GURU racing E-shaft
Defined autoworks is doing that right now. Aluminum rotors and triple plugs with telescoping intake too. I haven't seen a thread here, but they did post it on facebook. They are aiming for 700whp n/a
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Old Apr 21, 2013 | 06:27 PM
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From: https://www2.mazda.com/en/100th/
Originally Posted by j_tso
Scoot did a few years ago, Complete ENGINE
neat, why is there an Rx8 airpump in the engine picture?
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Old Apr 21, 2013 | 07:22 PM
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Where on this forum can I find people that know about the 18a swaps and 12a's in general>?
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Old Apr 21, 2013 | 07:46 PM
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From: https://www2.mazda.com/en/100th/
just do this, simple and it works https://www.rx7club.com/time-slips-d...-port-1006884/
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