What pulley sizes for F1R?
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From: Indianapolis Area
What pulley sizes for F1R? I am in the process of building a 402/408 iron motor with a F1R kit for my Firebird. I have a set of Patriot Stage 2 LS6 Heads, about 8.7:1 CR, Speed Inc. SC2 camshaft, and Kook Headers. I need some suggestion on both the supercharger and crank pulleys. I want to run one pulley on pump gas and another for race gas. I remember MMS made a larger crank pulley to reduce slippage at higher boost level. Do anyone else make it? Can I go larger on the crank pulley? My idea is to swap the crank pulley to change between the two boost levels. Also, I think I have an 8-rib pulley system. I don't know because my kit is in Indy and I am in Germany. Will this due for let's say 20psi of boost or 1.92:1 overdrive on the belts? I am trying to get a zero issue setup on this combo.
Here some psi amounts I have heard about:
408 : 224/228 cam : 7" crank , 4.1" blower = 11 psi
414 : 229/236 cam : 7" crank , 3.85" blower = 13 psi
402 : 236/245 cam : 7" crank , 3.7" blower = 15 psi
Mostly C5 setups.
Keith
408 : 224/228 cam : 7" crank , 4.1" blower = 11 psi
414 : 229/236 cam : 7" crank , 3.85" blower = 13 psi
402 : 236/245 cam : 7" crank , 3.7" blower = 15 psi
Mostly C5 setups.
Keith
Originally Posted by Gold Phoenix
OK, where do I get a 7" dia. crank pulley? How many rib belt were used?
Keith
