I understand I should be looking for 25Hg, I've got 15Hg
07-18-2016, 09:54 PM
#1
Racer
Thread Starter
Join Date: Jul 2012
Location: Parker, CO
Posts: 273
Likes: 0
Received 0 Likes
on
0 Posts
I understand I should be looking for 25Hg, I've got 15Hg
I've been hunting everywhere and I just can't find a vacuum leak. Anyone have any ideas? Could low compression cause this?
07-19-2016, 10:59 AM
#2
Racer
Thread Starter
Join Date: Jul 2012
Location: Parker, CO
Posts: 273
Likes: 0
Received 0 Likes
on
0 Posts
Actually, talking to a local it sounds like at this altitude 17Hg is about the best you can expect and I've seen as good as 16, so I'm calling that good for now.
07-19-2016, 11:05 AM
#3
Rennlist Member
15Hg is normal on that motor here Chuck. Even on my newer Audi with much higher compression motors I'd be lucky to see 17-17Hg.
My old 951's would see 15-16Hg, sometimes less. You're right in the wheel house...
My old 951's would see 15-16Hg, sometimes less. You're right in the wheel house...
07-25-2016, 09:19 PM
#7
Burning Brakes
I just purchased a 1986 951 , and tidy up so vacuum lines I get like 14 inches to 12 inches of vacuum at times. But I'm pretty sure I have bad valve guides and seals . Blue smoke on decel and at idle. I'm wondering is 135 psi across the board good for compression ? At 135 psi should I just remove head and inspect or pull motor and do rebuild?