Radix Guys: How much boost???
#13
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Originally Posted by O3GMC
Stock airbox + K&N = 8.6 psi before the shift
I just ordered a 3.25 pulley to replace my 3.4, should see 9.5-10psi
I just ordered a 3.25 pulley to replace my 3.4, should see 9.5-10psi
#14
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Originally Posted by GMC_DUDE
I get 7 to 7.5 psi boost with the stock 3.7" pulley. My engine is a 4.8 so it needs less air.
[edit - brian just told me the 4.8 kits come with the 3.7 ]
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No, mine isn't a Joe Gibbs, just an aftermarket unit I bought from Magnacharger. I read somewhere that the JG trucks have a 3.9" pulley, sort of an extra safety net for their warranty I guess. Also I heard that the pulley is mounted using a proprietary method so that regular aftermarket pulleys can't be used. However, modders, always an ingenious lot, found a way around it by just swapping out the whole drive snout. (Try and stop US from modding our truck will ya??!!! LOL).
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Originally Posted by O3GMC
Stock airbox + K&N = 8.6 psi before the shift
I just ordered a 3.25 pulley to replace my 3.4, should see 9.5-10psi
I just ordered a 3.25 pulley to replace my 3.4, should see 9.5-10psi
So having a cold air intake lowers the boost on a radix setup. I always thoght it raised the boost a little. Might have to find me a stock air box with a drop in K&N. What made you want to try the stock box?
#17
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Originally Posted by vortec327
So having a cold air intake lowers the boost on a radix setup. I always thoght it raised the boost a little. Might have to find me a stock air box with a drop in K&N.
#18
Originally Posted by moregrip
losing any boost in this scenario is not a big deal. It's still moving the same cfm and has a more dense Air charge to boot.
There was also a thread awhile back about all boost being equal which most people disagreed with. They used the example of a big turbo at a certain psi and a small turbo at the same psi and how the cfm was different. Something like that I think.
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