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

DISCUSSION => Engine + Driveline => Topic started by: sbarton on June 06, 2011, 12:21:31 PM

Title: Crank Scraper worth it in M42?
Post by: sbarton on June 06, 2011, 12:21:31 PM

The M20 guys that track their cars recommend getting a crank scraper (http://www.crank-scrapers.com/bmw_m42.html). Is it needed for the M42?
What is the benifit?  

-Scott

Title: Crank Scraper worth it in M42?
Post by: DesktopDave on June 07, 2011, 07:35:25 AM

The scraper pulls oil mist from the crankcase, cutting down on the crank's aerodynamic drag and oil foaming.  I'm pretty sure it'd pick up a little power, but I suspect it'd be difficult to find one.  Fabricating one wouldn't be that hard.

From what I recall, M50's had one from the factory, cast integrally with the crankcase.

I stand corrected...here's one for $60:
http://www.crank-scrapers.com/bmw_m42.html

Title: Crank Scraper worth it in M42?
Post by: rob_e30 on June 07, 2011, 08:01:31 AM

We run one in the race engine.  If you've got it apart, it's tough to beat for $70.