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Yes, but don't do it. (archive)

[ Follow Ups ] [ E30 M3 Message Board ] [ Msg. Board FAQ ]

Posted by JamesM on December 18, 2001 at 10:10:26:

In Reply to: Are there underdrive pullies for our cars? posted by Scott 325i on December 18, 2001 at 08:57:55:

For the S14? Yes. XP Engineering sells an aluminum front pulley, but it DOES AWAY WITH THE HARMONIC BALANCER!! Over time you will introduce cracks in the crankshaft, because the balancer dampens torsional vibrations at high RPMs. If you eliminate the balancer, you get nasty vibrations and higher stresses.

Also, if you drive your M3 on the street only, you won't be turning the alternator fast enough to effectively run the system, headlights, stereo, etc. This puts an extra strain on the voltage regulator, and it will burn up more quickly.

They're just not a good idea for the S14.


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