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      04-11-2010, 01:57 PM   #3
Bob MG
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United Arab Emirates

Drives: like a muppet
Join Date: Oct 2009
Location: Dubai

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Originally Posted by e.n335 View Post
A supercharger does not provide absolute boost like a turbocharger, it provides relative boost due to the fact that the speed of the compressor is directly related to the engines rpm. So at 5000 feet your stock car has -2.5 psi "boost pressure" compared to sea level ( 0 psi ). To get out 5.5 psi @ 5000 feet your SC kit needs to make 8 psi boost at sea level. How do you manage those 8 psi once you really leave your altitude ?
I know altitude scrubs off boost pressure, but I don't believe it to be that much??

I will not go to sea level, I live in the moutains.
If I decide to, I will put a bigger 100mm pulley on.

Based on what you are saying, I would need a 7psi pulley?

Roman I would love a comment...