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SVTPerformance's Chain of Restaurants
The Blower Bistro
Is belt slip due to psi alone?
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<blockquote data-quote="Sluggie24" data-source="post: 15530726" data-attributes="member: 184003"><p>Currently my 04 GT is running the 3.33" 6 rib pulley with stock crank pulley on a Vortech V3 si. CX racing FMIC, PP, bolt ons and full exhaust on stock engine. No belt slip and getting 10-11psi at 6k rpm.</p><p></p><p>I'm planning a forged lower, porting the heads and blower cams. This should cause a boost loss as the engine breathes better. Once I do this I was thinking I should go to the 3.1" pulley or even the size below that to at least keep the boost at about the same level.</p><p></p><p>My question is if switch to a smaller pulley with the engine build will I develop belt slip? I'm not sure if slip is a factor of pulley size itself (surface area contact) or due to increased resistance turning the pulley due to higher boost pressure. I'd rather avoid having to upgrade to the 8 rib setup if I can. </p><p></p><p>Any insight or experience would be appreciated. Also curious what would be the best compression to use for a street car? Stock or a bit lower?</p></blockquote><p></p>
[QUOTE="Sluggie24, post: 15530726, member: 184003"] Currently my 04 GT is running the 3.33" 6 rib pulley with stock crank pulley on a Vortech V3 si. CX racing FMIC, PP, bolt ons and full exhaust on stock engine. No belt slip and getting 10-11psi at 6k rpm. I'm planning a forged lower, porting the heads and blower cams. This should cause a boost loss as the engine breathes better. Once I do this I was thinking I should go to the 3.1" pulley or even the size below that to at least keep the boost at about the same level. My question is if switch to a smaller pulley with the engine build will I develop belt slip? I'm not sure if slip is a factor of pulley size itself (surface area contact) or due to increased resistance turning the pulley due to higher boost pressure. I'd rather avoid having to upgrade to the 8 rib setup if I can. Any insight or experience would be appreciated. Also curious what would be the best compression to use for a street car? Stock or a bit lower? [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
Is belt slip due to psi alone?
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