Posted by Frank Haas on August 24, 1998 at 20:56:03:
In Reply to: Re: bigger engine with e12 injection/ECU perf. mods. posted by Cliff Robb on August 24, 1998 at 11:12:09:
: Although I have no first hand experience in this area, I would assume that the stock E12 L-Jet would handle up to a 3.5L. The Euro M535i uses the same injector as the U.S. 528i. The air flow meters for the 2 cars do have different part #'s though. You could probably do the swap totally stock, then if the car seems to lean out at high load/revs, you could bump up the fuel pressure a little. I bet you will not have to.
: : I have a 3.5L high compression engine with the stock e12 injection in my car. All i did was stuff the engine in with no modifications to the stock injection. It works fine as it is!
: : dadbeh
Cliff,
I have put a Euro M535i engine in my Euro 528i, it works just fine, no modifications
are needed. It does run a little lean at high rpm (no O2 sensor to compensate)
unless you change the computer. I'd recommend using a early US 633 ECU/or Euro 635 ECU to match
the bigger engine.
Cheers,
Frank