quick vaccum question in inches?
Thread Starter
Joined: Mar 2011
Posts: 6,287
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From: Northwest Ohio
Car: 1991 Camaro RS
Engine: Lq4 6.0 SBE s485 turbo E85
Transmission: Fsi th400 stage 4. TSI 5500 st
Axle/Gears: Strange S60 4:10s
quick vaccum question in inches?
I think i fixed the only vaccum leak i had and I am recording from 11.5 to 12 inches of Hg vaccum. Before i fixed the leak i was measureing 9.5-10 inches
This car has a delta 260 re-grind cam, ported/polished heads, and ported upper, mid, lower intakes.
Is this 10.5-11 inches ok? IIRC 14-18 inches is what a stock 3.1L or 2.8L will pull.
This car has a delta 260 re-grind cam, ported/polished heads, and ported upper, mid, lower intakes.
Is this 10.5-11 inches ok? IIRC 14-18 inches is what a stock 3.1L or 2.8L will pull.
Thread Starter
Joined: Mar 2011
Posts: 6,287
Likes: 41
From: Northwest Ohio
Car: 1991 Camaro RS
Engine: Lq4 6.0 SBE s485 turbo E85
Transmission: Fsi th400 stage 4. TSI 5500 st
Axle/Gears: Strange S60 4:10s
Re: quick vaccum question in inches?
forget this post i jsut messed up the conversion with my meter. I forgot KPA is adverse from inches of Hg vac. 100kpa=0 inches of vac 0kpa=19.5 inches of vac.
That statements correct right?? If so i got 19.2 inches of vac at idle when engine is up to temp.
Does those ##'s, the 19.2 look better? I also live about 600 Ft above sea level.
That statements correct right?? If so i got 19.2 inches of vac at idle when engine is up to temp.
Does those ##'s, the 19.2 look better? I also live about 600 Ft above sea level.
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From: Davenport, Iowa
Car: Still a 3rd Gen
Engine: 450HP 355
Transmission: TH350
Axle/Gears: 9" with 4.11's
Re: quick vaccum question in inches?
that's not too far off from stock, Mine idles at around 6" Hg 
Thread Starter
Joined: Mar 2011
Posts: 6,287
Likes: 41
From: Northwest Ohio
Car: 1991 Camaro RS
Engine: Lq4 6.0 SBE s485 turbo E85
Transmission: Fsi th400 stage 4. TSI 5500 st
Axle/Gears: Strange S60 4:10s
Re: quick vaccum question in inches?
wow 6"!!!! The reason i converted mine wrong is becasuse i was converting is without useing absolute pressure..14.7psi so it was like 10" when I was converting it wrong
Mine was 21" IIRC stock. But i live at almost sea level. now 19" so the cam didnt mess up the vac too bad, but it is just a little mild cam.
Mine was 21" IIRC stock. But i live at almost sea level. now 19" so the cam didnt mess up the vac too bad, but it is just a little mild cam.
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