Re: EA 5spd to 4spd conversion?
It's very possible. Although the EA/EBI had a seperate trans computer, whereas EBII onwards the trans computer was intergrated into the ECU.
My EBII (non-smartlock) had an EA 5spd in it running the EBII Auto ECU. No dramas at all, once in a blue moon the idle would play up and sit on around 1000rpm then go back to normal. The only other prob was the fact that it wouldn't go into test mode because the auto wasn't there, so base timing etc couldn't be set.
I also tried it with an EA 5spd ECU and the car seemed to run a bit better, but the a/c compressor would not engage because they run a different system to the EBII.
My advice is, if you can get the correct computer, GET IT! If you can't it's no big deal, but the little niggly problems really start to piss you off after a while.
Appart from that everything will bolt up no worries at all.
1992 AXII Telstar TX5 Ghia
121kW 2.5L DOHC V6 in a car that weighs 1100kg's and looks like a 4 banger from the outside......SLEEPER!
1988 EA S Pak 3spd CFI.....Soon to be a 250rwkw HSV eating machine.