Milkcow060

what should a 87' 951 pull for vacuum at idle? im trying to figure if i have a vacuum leak and my boost gauge is reading about 10

gregeast

Many threads on the this topic, consensus seems to be 16-18 at or around sea level. Up here in the Rockies it's more like 12-14.

I would venture to guess if you're seeing 10 at sea level you more than likely have a fairly sizable leak.

Milkcow060

I was looking for threads but I could not find a strait answer...But yeah...I guess it does look like I have a leak. Hmm...I just replaced all the vacuum lines so this is going to be interesting. Whats a good way for finding leaks?

Cra$h

https://rennlist.com/forums/showpost...31&postcount=7

Milkcow060

cool device...thanks for the link

mtnman82

Or, you could spring the $50 for SFR's 'smokenator'. I just got mine last week. Here's a link to the thread:

https://rennlist.com/forums/944-turbo-and-turbo-s-forum/298949-the-greatest-turbo-tool-ever.html

gregeast

My statement about 'many threads on this topic' was not intended to give you a hard time about searching, just meant that my answer was based on my interpretation of numerous threads that I've read.

The tools that the others gave you links to should lead you to the source in fairly short order, best of luck tracking it down!

SD Porsche Fan

I get about 16 at idle and about 21 in gear, off throttle. Pressure testing is a good idea.