cpt_gloval

iTrader: (1)

i'm looking at a dieing motor in my gsl-se. i'm considering the option of either having my engine rebuilt with the SE rotating assembly and S4 housings or buying a used S4 engine.

the question is could i use my SE injection gear (intake manifold, throttle body, injectors, etc) on an S4 motor assuming I use an SE front cover to mount it in my car all nice?

as long as the car is streetable like this, i would be happy. i'm not looking for major upgrade city here. it's just that S4 NA motors are easier to come by than GSL-SE motors.

and hell... down the line, i could throw down with the S4 injection system and a standalone computer.

what say you?

RotaryResurrection

iTrader: (8)

I've done this. The s4+ engines have larger ports, plus the parts are usually in better condition (rotor housings, at least) than the pre 86.

Yup. There is a port air passage at the LIM that the s4 doesnt have. This could affect emissions, if you need to pass a sniffer, other than that it won't matter.

IT wouldnt be terribly hard to engineer the stock s4 stuff to work without a standalone. The power gain would only be 10-20hp, and most of that can be gained by using the s4 throttlebody and manifolds in conjunction with your stock SE wiring/injection/sensors. I do this routinely and get 10-20hp (butt dyno) out of stock SE's. ONe day soon I will have a writeup on my webpage.

cpt_gloval

iTrader: (1)

so the ports on the exterior of the motor should be the same size, save for that goofy little emissions hole? this is good news. also, do i need to block-off that air port thing?