Pulley size?
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Pulley size? I am trying to figure out how much boost will I make with a 3.90 pulley.
Engine is a 408 with 9.0:1 CR, AFR 225 72cc, Fast 90/90, FMIC, F1C, ARH LTs, 8 Rib 8.25 kit from EPP.
Engine is a 408 with 9.0:1 CR, AFR 225 72cc, Fast 90/90, FMIC, F1C, ARH LTs, 8 Rib 8.25 kit from EPP.
Last edited by dixonk; Oct 9, 2007 at 03:06 PM.
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I am building right now. I have both a 4.10 and a 3.90 with a F1C blower. Never ran it yet just need to know because I am selling the D1 head unit and the guy needs a pulley for it.
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Well I suppose with my higher step up ratio on the blower and the larger crank pulley I had probably better use the 4.10. I am trying to get in the 18 to 20 psi area for now. How long have you been running the FAST intake at those boost levels. It is about the only thing I am unsure of in my build and can't seem to find a clear answer on that or people that have actually tested it for that matter.
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