08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Vacuum while cruising?

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Old Sep 16, 2011 | 05:31 PM
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From: Norf Cakalacky
Vacuum while cruising?

Jus wonderin What everybody's vacuum is at while jus cruisin..
Not when you're gettin on it or nuthin, jus cruisin like highway speeds or watever..

I'm trifecta Tuned with that Forge BPV an Green spring an usually I'm around 15hg an 20-21hg when im on the clutch,18 when the clutch is in. When I had the yellow spring, it seemed like i was usually sittin around 16-18 hg while off the clutch

Last edited by MastaShaKe_88; Sep 16, 2011 at 05:37 PM.
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Old Sep 16, 2011 | 05:43 PM
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From: NY
crusing im at 8hg
no forge bpv
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Old Sep 16, 2011 | 05:44 PM
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From: Norf Cakalacky
really? I mean like jus cruisin.. jus keepin a steady speed
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Old Sep 16, 2011 | 05:50 PM
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i cruise at 11.5 psi lol
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Old Sep 16, 2011 | 05:51 PM
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From: NY
yea steady speed i am usually at 8hg]

i only cruise now your seems low but then again idk if mine is high

we need more input
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Old Sep 16, 2011 | 05:56 PM
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From: Rochester, NY
12-15hg with forge green spring
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Old Sep 16, 2011 | 05:58 PM
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From: Norf Cakalacky
Originally Posted by riceburner
i cruise at 11.5 psi lol
lol werd


an ya i wanna see some more people's stuff
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Old Sep 16, 2011 | 06:21 PM
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From: Oshkosh, WI
10 hg at freeway speeds
15 hg at city speeds
20-21 hg when coasting (no throttle but still in gear)

20-21 hg when stopped with clutch in or idling
18 hg when stopped with a/c on
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Old Sep 16, 2011 | 06:36 PM
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From: Norf Cakalacky
Originally Posted by AaronJ
10 hg at freeway speeds
15 hg at city speeds
20-21 hg when coasting (no throttle but still in gear)

20-21 hg when stopped with clutch in or idling
18 hg when stopped with a/c on
hmmm ima see if mine changes the more i blast my a/C lol
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Old Sep 16, 2011 | 06:40 PM
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From: TN
6-8 cruising
18 idling and coasting with the a/c
20 idling and coasting without a/c
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Old Sep 16, 2011 | 07:23 PM
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I'm pretty much same as miller
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Old Sep 16, 2011 | 07:33 PM
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From: Wheh ah we? MA.
30 PSI


But really, I sit right around 10 in/hg while cruising steady. Sometimes at higher highway speed while just cruising on a really flat piece of road and really light on the throttle I see 15ish.

Idle warmed up is 20 in/hg

Decel in gear is about 21-21 in/hg

AC on is about 17-18 in/hg
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Old Sep 16, 2011 | 10:44 PM
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From: Norf Cakalacky
Originally Posted by Gremlin85
30 PSI


But really, I sit right around 10 in/hg while cruising steady. Sometimes at higher highway speed while just cruising on a really flat piece of road and really light on the throttle I see 15ish.

Idle warmed up is 20 in/hg

Decel in gear is about 21-21 in/hg

AC on is about 17-18 in/hg
That sounds about where I'm at.. cept I'm round 15hg when cruisin.. verrrry light throttle
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Old Sep 16, 2011 | 11:55 PM
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From: Bradenton, FL.
Originally Posted by AaronJ
10 hg at freeway speeds
15 hg at city speeds
20-21 hg when coasting (no throttle but still in gear)

20-21 hg when stopped with clutch in or idling
18 hg when stopped with a/c on
same here^^^

18psi when i punch it
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Old Sep 17, 2011 | 01:38 AM
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From: NY
Definitely getting the forge
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Old Sep 17, 2011 | 02:23 AM
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I'd say 15-11
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Old Sep 17, 2011 | 06:13 PM
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where's the cheapest place to get the forge bpv?
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Old Sep 17, 2011 | 10:31 PM
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From: Norf Cakalacky
I dont even remember where I got mine from

For the guys with the forge tho.. Which spring are you usin? and are you tuned or not, wat PSI an bla blabla...
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Old Sep 18, 2011 | 12:31 AM
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From: NY
modern performance has it

im getting it and putting yellow in
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Old Sep 18, 2011 | 01:22 PM
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From: Norf Cakalacky
Bump
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Old Sep 19, 2011 | 11:09 AM
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From: the north
I run 10psi of vacuum in my tires

for real though, tried a new restaurant last night, good food.

Last edited by guitarenvy; Sep 19, 2011 at 04:06 PM.
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Old Sep 24, 2011 | 10:59 PM
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cool story bro
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Old Sep 24, 2011 | 11:09 PM
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What if it sits at 14-16 when at idle
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Old Sep 24, 2011 | 11:34 PM
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Originally Posted by steven2008ss
What if it sits at 14-16 when at idle
is that with the engine up to temp?
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Old Sep 24, 2011 | 11:44 PM
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Yup it does it ti me sometimes
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