so i've been fantasizing for the longest time about a cosworth 9 head on a 2.4 block in my light 8 chassis (vcd).

what's the ecu magic that has to happen? in my unfamiliar mind i'm still envisioning that the 9 ecu can run all the 8 functions minus stuff like intercooler sprayer (big loss there). am i right? or is this a wiring nightmare that should never be attempted?

i thot it'd be easy... not too many people doin' it.

 

I saw a thread on this before the guy called it the evo 8.5 used a Evo IX wiring harness and ECU becuase the pin outs are different. Undoubtedly this would be an undertaking probably involving a great deal of time on pin out specs.

 

yea you'll lose a few things ... you would have to change the harness as well as the ecu.. dont forget you would need to tap the 8 block for new oil passages for the mivec head...

 

so the pin outs are very different but functionally... the 8 will work, run and be normal like a normal 9 yeah?

now the pin outs, are we talkin' the ones on the ecu side or the ones on the engine bay harness side?

so you swap out the ecu with a harness too. and you try to rerun all the wires all nice and clean. then there's something with pins? or is that the end of the swap (mechanical engine stuff aside)