To 12a or 13b a Porsche 914
Thread Starter
Junior Member
Joined: May 2009
Posts: 1
Seems like rotary swaps are the hot thing going these days. Figured I'd dabble with one.
Current plan is to semi-gut a Porsche 914, keep the steel wheels and (hopefully) keep it under 1 ton with myself in it. It should really help the weight savings by going rotary and junkyards are plentiful with either the N/A S4 13b's or the 12a's. For simplicy sake of doing the build, I wondered if the 12a would be potent enough with the stock transmission, or if I should take the leap and attempt to connect the 13b wiring harness w/ECU to the car. I'm used to carburetors and distributors myself. :D
Also, are the engine mounts diferent? Kits exist for the job, but if they're engine specific, i'll stick with whatever they're meant for.
Thx for looking.
Current plan is to semi-gut a Porsche 914, keep the steel wheels and (hopefully) keep it under 1 ton with myself in it. It should really help the weight savings by going rotary and junkyards are plentiful with either the N/A S4 13b's or the 12a's. For simplicy sake of doing the build, I wondered if the 12a would be potent enough with the stock transmission, or if I should take the leap and attempt to connect the 13b wiring harness w/ECU to the car. I'm used to carburetors and distributors myself. :D
Also, are the engine mounts diferent? Kits exist for the job, but if they're engine specific, i'll stick with whatever they're meant for.
Thx for looking.
Member
Joined: Apr 2003
Posts: 91
From: gloucester
Originally Posted by Wheezing12a' post='922199' date='May 29 2009, 10:55 AM
Seems like rotary swaps are the hot thing going these days. Figured I'd dabble with one.
Current plan is to semi-gut a Porsche 914, keep the steel wheels and (hopefully) keep it under 1 ton with myself in it. It should really help the weight savings by going rotary and junkyards are plentiful with either the N/A S4 13b's or the 12a's. For simplicy sake of doing the build, I wondered if the 12a would be potent enough with the stock transmission, or if I should take the leap and attempt to connect the 13b wiring harness w/ECU to the car. I'm used to carburetors and distributors myself.
Also, are the engine mounts diferent? Kits exist for the job, but if they're engine specific, i'll stick with whatever they're meant for.
Thx for looking.
Current plan is to semi-gut a Porsche 914, keep the steel wheels and (hopefully) keep it under 1 ton with myself in it. It should really help the weight savings by going rotary and junkyards are plentiful with either the N/A S4 13b's or the 12a's. For simplicy sake of doing the build, I wondered if the 12a would be potent enough with the stock transmission, or if I should take the leap and attempt to connect the 13b wiring harness w/ECU to the car. I'm used to carburetors and distributors myself.
Also, are the engine mounts diferent? Kits exist for the job, but if they're engine specific, i'll stick with whatever they're meant for.
Thx for looking.
Senior Member
Joined: Oct 2001
Posts: 790
From: Portland, OR
Originally Posted by Wheezing12a' post='922199' date='May 29 2009, 07:55 PM
Seems like rotary swaps are the hot thing going these days. Figured I'd dabble with one.
Current plan is to semi-gut a Porsche 914, keep the steel wheels and (hopefully) keep it under 1 ton with myself in it. It should really help the weight savings by going rotary and junkyards are plentiful with either the N/A S4 13b's or the 12a's. For simplicy sake of doing the build, I wondered if the 12a would be potent enough with the stock transmission, or if I should take the leap and attempt to connect the 13b wiring harness w/ECU to the car. I'm used to carburetors and distributors myself.
Also, are the engine mounts diferent? Kits exist for the job, but if they're engine specific, i'll stick with whatever they're meant for.
Thx for looking.
Current plan is to semi-gut a Porsche 914, keep the steel wheels and (hopefully) keep it under 1 ton with myself in it. It should really help the weight savings by going rotary and junkyards are plentiful with either the N/A S4 13b's or the 12a's. For simplicy sake of doing the build, I wondered if the 12a would be potent enough with the stock transmission, or if I should take the leap and attempt to connect the 13b wiring harness w/ECU to the car. I'm used to carburetors and distributors myself.
Also, are the engine mounts diferent? Kits exist for the job, but if they're engine specific, i'll stick with whatever they're meant for.
Thx for looking.
Kennedy Enginneered Products makes an adapter. Go with the 13B, I'd also recommend going with an Injected motor. The 914 doesn't habe much for a ECU and Wiring, So pretty much get all of the RX7 Wiring and transplant it. The hardest part will be the exhaust, getting it quiet in the limited amount of room you'll have for the pipes. You'd need at least 2 mufflers to get it quiet enough and or a silencer. And the Rotary's Exhaust is HOT 1800 degree's so it will eat up all of the best of mufflers. A Turbo Swap would be nice, and you'd have the benefit of the Turbo acting as a silencer, Though you'll still need a muffler and a silencer to be streetable.
The 914 has a real easy motor mount setup, You should be able to weld up something to use it.
Good Luck!
Junior Member
Joined: Jul 2008
Posts: 5
I have a brand new adapter plate for sale for a 13b as well as a stage 3 clutch from kennedy. lmk if you are interested. I also have a 13b turbo engine with manifold, wiring harness and stand alone system that i am willing to get rid of for 2k.
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