Re: IS A LIGHTENED FLYWHEEL OK FOR A DAILY DRIVER? (archive)

The point I was making was that you can't lighten a BMW flywheel below 15 lbs or else you will run into problems. An Aluminum one is the only way you get lower. As for the idle, the 15 lbs one I have in my car keeps the stock idle of 650. It is dead on too, no surging.

Rob A
M535i SIG Chief Technical Advisor
www.m535i.org

I think that Top End performance is better. Even though they don't do a core charge, they only cost $150 and will do it to your specs. I agree with RA/Bob in the fact that a lightened flywheel is fine for a daily driver. I would suggest only going down to 15 lbs. Anything below that and you could start running into problems. At the same time I suggest the M5 clutch disk and pressure plate. The parts are listed on my pages of the M535i.org site. There is also a link to Top End Performance.

Rob A
M535i SIG Cheif Technical Advisor
www.M535i.org

JOSH
THX
COLORADO
535I TO m535IS

A lightened flywheel is fine for every day;adds faster throttle response.The best I know,and reasonably priced, is Jim Rowe's program at Metric Mechanic;he does an excellent job,often by sending the new flywheel and a core charge exchange,so the car isn't tied up.Loved mine.
Ask him about head work and a special exhaust;my '86 he did over with a Schrick cam was just plain scary.

You seem determined to build a single cam M5;not a bad goal.

I have installed a custom Paeco made 9 lb aluminium flywheel on my daily driver w/the sachs HD clutch.

I've had no problems in the last 4+ years of use with this setup and the car still idles at 750-850 rpm just fine.

The car is noticable quicker though.....

Cost?? $550 for flywheel and $400 for the clutch. So it's not cheap!

http://www.m535i.org

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