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How much boost am i going to make

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Old 07-26-2009, 07:00 PM
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Default How much boost am i going to make

I can not find any post that would help me but right now i have a stock ls1 all but a blower cam and 1 3/4 exhaust to 3 inch duals if that matters. A 7.65 and 4.38 pulleys how much boost would i be making. If there is a link for information of this kind of stuff please direct me to it.
Old 07-26-2009, 07:01 PM
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I am not positive but I would guess around 5lbs
Old 07-26-2009, 07:20 PM
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What would u think i would need to make 8 like i am supposed to be making
Old 07-26-2009, 09:19 PM
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My stock 346 made 7-8lbs at about 6400rpms with 7.65/4.5 pulleys
Old 07-27-2009, 07:38 AM
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Between 6 and 8lbs.
Old 07-27-2009, 07:53 AM
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He has a cam and headers so boost will be lower than a stock motor but will make more power. No one can know for sure. Your best bet it to install it and see what it makes, then change pulley if necessary.


What size cam is it?
Old 07-27-2009, 06:14 PM
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Originally Posted by AFASTYZFR1
He has a cam and headers so boost will be lower than a stock motor but will make more power. No one can know for sure. Your best bet it to install it and see what it makes, then change pulley if necessary.


What size cam is it?
+1
Old 07-27-2009, 09:22 PM
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thanks a fast for your help
Old 08-02-2009, 07:40 PM
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well about 5 lbs is what i made good job by procharger huh they told me that they were worried i would make 9 or more with my set up
Old 08-02-2009, 08:20 PM
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Originally Posted by AFASTYZFR1
I am not positive but I would guess around 5lbs
do I win a prize? haha
Old 08-02-2009, 08:36 PM
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so what size pulley would i need for 8 psi do u think and what is the rule of thumb each psi is 20 to 30 hp does that sound right?
Old 08-02-2009, 08:42 PM
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Maybe a 3.9-4.0" pulley for 8-9psi I would say 15-20hp per psi but it's going to be different for each set up
Old 08-03-2009, 05:06 AM
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I'd try a 4.0" pulley. http://www.exoticperformanceplus.com....html?item=970

http://www.exoticperformanceplus.com...html?item=1041
Belt size chart. Bob




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