How mutch vacuum you guys makin'

[RobDET]

My car when it's cold makes about -22psi. When it warms up it can't manage more than -12 to -15psi. Also if i touch the throttle at all it goes to zero and sputters. As soon as the manafold pressure goes positive the car runs great.

I'm pretty sure i have a vacuum leak but i was wondering how mutch vacuum to shoot for.

[unfrgivn]

My car makes about 20psi vac after boosting hard and normaly around 15psi.

[forsaken]

I have 20 pretty much all the time at idle.

[240_Keyy]

yep, right at 20 to 22 vac while idling...

[RobDET]

What about crusing at 50 in 5th gear?

[vwluv10338]

Off the top of my head I dont know about 50mph. At idle or low rpm crusing about -20. On the highway 70mph = ~300rpm which I believe is about -10 vac.

Eric

[RobDET]

So if my vacuum is low are there any causes except a leak?

[Samabra]

Not really, unless you have cams

[edisapimp]

i pull 14 inches vaccum at idle - but my head is flowed.

most SR people i know pull 18-20 inches.

[S13240]

-.59 kg/cm2

[Zaxx84]

Same here...about -20-22 psi, warmed up or not.

[SRBURG13]

Mine stays at like -13in/hg or "psi" as your saying. This is while at cruising speed.

[nrcooled]

I run about 20-22 vacuum. When I had my SMIC it was more, normally about 25

[unfrgivn]

Mine stays at like -13in/hg or "psi" as your saying. This is while at cruising speed.

Yea that was me not paying attention, I meant in/hg.