M50 rev limit confusion

[Biddy627]

Been searching everywhere and can't find the answer. Does anybody know if the AUTOMATIC NON VANOS m50 ecu's had a rev liniter or not. Want to know before I finish my swap whether I need to buy a limiter or find a new ecu

[Varinn]

I'm pretty sure all fuel injected BMW's come with a rev limiter, I mean I could be wrong, but to my understanding all of them should have one.

[atmobenzin]

The truth. ^^^

Except if someone has put in a chip which raises/removes it.

[nando]

buy a limiter?

all of them have it - you can't "remove" the rev limit, but you could raise it way higher than the engine is capable of.. if you can program the DME, that is.

[Biddy627]

Thanks for clearing up the confusion, was worried cause my old 2.7 stroker was running an auto ecu and didn't have a rev limiter

[nando]

yes it did.

[GunMetalGrey]

Possibly not, a friend had a 325e with a dinan (I think, may be wrong on that) chip that had no limiter. Needless to say his engine didn't like it very much when he was accelerating hard and hit a ice patch...
But if it's a stock ECU you have a limiter, no doubt.

[SwiftE30]

Nando rocked it on this one. 99% of the time an ecu without an aftermarket chip/tune will have a rev limiter.

[nando]

It always has a limiter. It may be raised higher than you ever reved it, but it still has one. You cant turn it "off".

Also, automatic e30s dont have different DMEs - and they have limiters too.

[328ijunkie]

^That. My auto M20 auto will slam into the limiter all day long