Do I need an upgraded ECU with a Schrick 272 in other wise stock M20 engine?

[bimmerdriver49]

Hello, I've got a freshly built completely stock e30 m20 engine except for the cam which is a Schrick 272. My engine builder told me it would run fine with a stock setup. But, the car runs noticeably more sluggish than my other e30 that is Completely stock. I contacted Bimmerworld, who sells the cam and they basically said they don't have any recommendations. Thanks much, in advance for any help trying to figure out if I Should upgrade the ECU and then, how I would go about determining what to upgrade to.

[Panici]

The WOT maps are open loop, so they have fixed fueling and timing.
As you've changed the airflow with a cam, I'd guess you're rich in the midrange and lean up top.

Before you swap the entire ECU, you should look at a "chip" tune. I would only trust an old head tuner for chip swaps, lest you be given an off the shelf Dinan clone.
Personally I'd contact Mark D (https://dsylva-tech.ca) and see if he has anything specific for your ECU and cam setup.


You could go down the road of a standalone ECU, but that will require hardware and wiring changes, and is probably overkill for your needs.

[bimmerdriver49]

Thank you Panici for the tip. I'll contact Mark.

[digger]

sssquid also do chips

[TobyB]

Me, I'd stick a wideband oxygen sensor on it, and see what's happening.

THEN go from there.

t

[Panici]

Me, I'd stick a wideband oxygen sensor on it, and see what's happening.

THEN go from there.

t

Not a bad idea. Maybe the factory WOT tune is sufficiently rich to handle the extra airflow?

[digger]

often the idle timing needs some fudging amongst other things when the cam is bigger so there is slightly more to it than the AFR are ok therefore GTG