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FAQ / REFERENCE => M42 Reference => Topic started by: 16v of E30 on October 24, 2008, 03:10:54 AM

Title: Adjustable timing on M42 engine?
Post by: 16v of E30 on October 24, 2008, 03:10:54 AM

According to this info:
http://http://www.r3vlimited.com/tech/318is/318is.htm (http://www.r3vlimited.com/tech/318is/318is.htm)

you can adjust the timing of the m42 engine +/- 6 degrees.

anyone know where i can find some info on doing this?

Title: Adjustable timing on M42 engine?
Post by: christophbmw on October 25, 2008, 11:07:34 AM

if you are talking about the cam timing i have done it (link does not work for me). you cannot go more than +/- 5 degrees otherwise the ecu will see this (via cam, crank sensors) and de-tune the engine, put the redline at 4500rpm. if you go less, say +/- 3 degrees it is pointless. all you are doing is moving the powerband either lower in the revs, or higher. no real gain, the best setting is the factory setting. search it in the forum here, i did a good writeup on the subject a couple of years ago.

Title: Adjustable timing on M42 engine?
Post by: 16v of E30 on November 03, 2008, 02:41:39 AM

cool thanks...

Title: Adjustable timing on M42 engine?
Post by: roundel318 on November 17, 2008, 04:47:28 PM

no wonder the factory left it that way:)