M20 afm swapp fro m30

[E30_fiend]

I am running an 027 AFM from an 86 535i, 17.5lb injectors from an M50 and the Mark D 17/19lb chip. The car runs hella rich when its cold but as soon as you're out of the blue it runs great. Idle is very lumpy when cold though. I'm pretty sure it runs pretty rich even when warm but pulls hard! i heard maybe playing with the spring inside the AFM? i'd like to get a wideband o2 and get it on the dyno then play with the spring. overall i'm happy with the mod.

First off, the M30 AFM won't effect the richness of your fuel mixture. In fact it should lean it out because its the same internals as the stock AFM but with a bigger inlet and outlet opening. I.E. more air.

And about the spring inside. DO NOT MESS WITH IT. Its calibrated perfectly. If you think the calibration is off then swap out the internals from your stock AFM. If you still have rich issues then the problem is elsewhere.

[CrazyB]

Great thanks for the info. i guess now I can keep my eyes out for the right afm to do this mod once my suspension is done.

[E30_fiend]

Ha ha ha.

I have one for sale nukka.

PM me if you're interested.



Taylor

[ADEN]

my injectors are green and i have m20b20.i need to put m30 afm alone is that gonna speed my ride?