M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine management => Topic started by: El-Kanal on May 03, 2009, 01:25:32 PM

Title: AFM Question
Post by: El-Kanal on May 03, 2009, 01:25:32 PM

Hi, I´m curently tuning my engine, leaving it N/A though and also trying to keep the stock ECU. Curently I´m working on the COPs and want to move on o the intake and exhaust. Now I know the main restriction on the M42 is the AFM on the intake.
Deleting it, or doing the MAF conversion is prety problematic in my book, but has someone tryed using two AFMs? I know the R34 Skylines use two MAFs f.e. but they are twincharged on the other hand.
If im not  mistaken, the AFMs are baffle door type, so it should be only a matter of wiring two pots in serries and changing the resistance values?
Is someone here into electronics LOL?
Here are some pics of the skyline:
(http://www.pro-imports.ie/images/bnr32-028.jpg)
(http://www.pro-imports.ie/images/bnr32-027.jpg)

Title: AFM Question
Post by: Danny707 on May 03, 2009, 02:47:43 PM

Why would you want to use 2 afms?

I don't understand how that would free up any airflow at all.

Title: AFM Question
Post by: fiftytakedowns on May 03, 2009, 02:54:11 PM

looks like a atight squeeze in there

Title: afm
Post by: roundel318 on May 03, 2009, 07:31:20 PM

metric mechanics 2.1L stroker M42 uses the stock AFM, is N/A, and makes 205hp.
The AFM can't be that bad, can it?

Title: AFM Question
Post by: BraveUlysses on May 04, 2009, 09:48:09 AM

MM is hardly the authority for high performance engines.

Title: AFM Question
Post by: roundel318 on May 04, 2009, 10:34:05 PM

I suppose I used them as an example :P

Title: AFM Question
Post by: naika on May 11, 2009, 04:55:46 AM

what about swappint a e36 afm?, aren't they better?

Title: AFM Question
Post by: El-Kanal on May 11, 2009, 07:11:06 AM

I have an E36, and acording to ETK There was no change in the AFM between e30 and e36 M42s, but maybe you mean the M44 AFM?

Title: AFM Question
Post by: naika on May 12, 2009, 11:34:05 AM

wel, I'm in Europe and it seems like some of us here swap the e36 afm, it is a different one it seems like. But maybe in the US it happened on the M44's, if anybody can confirm?