Hi, I have almost completed a supercharger and EFI installation. My question is how exactly does the crankcase get it's vacuum?? and what purpose does the brass tube under the fuel distributor serve in relation to this (if any. I have removed all the old EGR system so do i still require the hose off the brass tube to the small tube on the filler cap?? The large tube on the filler cap i have connected to the intake before the throttle plate. I didnt want to blow the oil cap off the first time i start it! Is the brass tube under the fuel distributor feeding off the manifold or does it go right through and feed into or off the valley (crankcase) How would this function now the manifold will be under preasure and not vacuum?? I also have a blow off valve that will re-circulate the boost back into the intake at idle. All advice is greatly appreciated. (hope i have explained what i was trying to ok!) Cheers, Nick - Sydney To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/