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How much boost am i going to make

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How much boost am i going to make

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Old

Jul 26, 2009 | 07:00 PM

#1

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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

Jul 26, 2009 | 07:01 PM

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I am not positive but I would guess around 5lbs

Old

Jul 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

Jul 26, 2009 | 09:19 PM

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My stock 346 made 7-8lbs at about 6400rpms with 7.65/4.5 pulleys

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Jul 27, 2009 | 07:38 AM

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Between 6 and 8lbs.

Old

Jul 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

Jul 27, 2009 | 06:14 PM

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Quote:

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?

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Old

Jul 27, 2009 | 09:22 PM

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thanks a fast for your help

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Old

Aug 2, 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

Aug 2, 2009 | 08:20 PM

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Quote:

Originally Posted by AFASTYZFR1

I am not positive but I would guess around 5lbs

do I win a prize? haha

Old

Aug 2, 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

Aug 2, 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

Aug 3, 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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