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2.8, how much boost?

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Old Jun 8, 2009 | 01:03 PM
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From: Wading River, N.Y.
2.8, how much boost?
How much boost should i get with a 2.8 pulley?
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Old Jun 8, 2009 | 01:24 PM
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From: LaCrosse, WI
17 psi give or take...
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Old Jun 8, 2009 | 02:04 PM
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From: NEPA
depends what you have done to your car .... better flowing exhaust and intake will equate to lower boost numbers, but that isnt a bad thing. i would say on avg you will see 17 psi with a 2.8 pulley.
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Old Jun 8, 2009 | 05:51 PM
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according to the scanner i hit 17.5 - 18.1 usually
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Old Jun 8, 2009 | 05:59 PM
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yeah it all depens on ur car.. if u have a ported head( u drop psi), freer flowing exhaust( drop psi) , Ported sc( drop psi).. but on average a mechanical boost gauge will say 16-18
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Old Jun 8, 2009 | 06:05 PM
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i run stock exhaust 2.9 pulley and in summer and warmer weather i run 16-17. in winter like very cold weather i hit 18-19 in third gear.
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Old Jun 8, 2009 | 09:09 PM
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I see about 15psi, maybe 16 at redline.

Ported blower and a header. stock dp and exhaust. also right at sea level.
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Old Jul 17, 2009 | 11:23 PM
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im at 16-17 with 2.79
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Old Jul 29, 2009 | 12:43 AM
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I'm not sure on my pulley size, but I have stage 2 and it hits 16ish max
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Old Jul 29, 2009 | 07:30 AM
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Originally Posted by LilVette
I'm not sure on my pulley size, but I have stage 2 and it hits 16ish max
if you are a true GM Stage 2 car you have a 3.06 pulley.
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