04-09-2004, 01:09 PM
Generic understanding.
Yeah, the intake generates the vacuum (as the air gets sucked in from the outside through the engine). The breather line from the valve cover is just to vent the vapors, which ingeniously are vented back into the intake after the filter, so hot, greasy air goes into the engine and can build up in the combustion chambers and whatever (see how greasy your TB/intake boot are). It basically does vent the crankcase though. M3's came with a vapor collector though, which would be a cool thing to retrofit.
I can't really see how diesel's wouldn't have a vacuum. Maybe something wierd with the super high compression ratios or something? It still has to suck in air...
It's not used for cruise control, AFAIK.
Just do a 2002 motor conversion. No crappy vacuum advance, just a filter on the valve cover...good times.
Yeah, the intake generates the vacuum (as the air gets sucked in from the outside through the engine). The breather line from the valve cover is just to vent the vapors, which ingeniously are vented back into the intake after the filter, so hot, greasy air goes into the engine and can build up in the combustion chambers and whatever (see how greasy your TB/intake boot are). It basically does vent the crankcase though. M3's came with a vapor collector though, which would be a cool thing to retrofit.
I can't really see how diesel's wouldn't have a vacuum. Maybe something wierd with the super high compression ratios or something? It still has to suck in air...
It's not used for cruise control, AFAIK.
Just do a 2002 motor conversion. No crappy vacuum advance, just a filter on the valve cover...good times.