Anti-slip pulley, where to get?
04-08-2013 | 12:44 PM
#21
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I don’t know why some of you guys have had so much trouble with belt slip and eating belts. Blows my mind. Maybe its been the hp/acceleration differences 
But I ran a custom 2.7" pulley on the stock 5.45 comptech novi 1000 kit for some time and never had an issue. I did cut lateral grooves in it with my dremel for insurance. Never was a problem. I think picking the right belt and making sure the blower and lower crank pulley is in perfect alignment and tension is the key, since the blower bracket is rubber mounted, it can and will shift.
Picking a long enough belt to get the most "wrap" around the SC pulley without running out of tightening adjustment is also crucial. Some guys for what ever reason think the smallest/tightest belt they can squeeze on is what your supposed to do, but its the opposite, you want the loosest/largest belt without running out of titening adjustment.
But I ran a custom 2.7" pulley on the stock 5.45 comptech novi 1000 kit for some time and never had an issue. I did cut lateral grooves in it with my dremel for insurance. Never was a problem. I think picking the right belt and making sure the blower and lower crank pulley is in perfect alignment and tension is the key, since the blower bracket is rubber mounted, it can and will shift. Picking a long enough belt to get the most "wrap" around the SC pulley without running out of tightening adjustment is also crucial. Some guys for what ever reason think the smallest/tightest belt they can squeeze on is what your supposed to do, but its the opposite, you want the loosest/largest belt without running out of titening adjustment.
I'm jealousAre you doing pulls or running continuous high RPM @ the track.
Also, the Novi 1200 will put more load on the belt and will require a higher demand for slip.
04-08-2013 | 02:13 PM
#24
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04-08-2013 | 06:55 PM
#27
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How long can you hold 7-8K RPM and not encounter belt slippage?
04-08-2013 | 07:27 PM
#28
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What causes belt slip is the differential acceleration speed from the motor spooling up faster then the belt can grip and pull the sc. Holding a high rpm should have no chance of slipping issues. If you mean dropping down to say 7k and then accelerating to 9k rpm then there is potential there of course because there is 2k rpm of acceleration potential and that's where peak engine power is made as well, where belt slip happens most. Holding a high rpm should not slip at all, because the sc and crank are "equalized". There is virtually no duty required from the belt at that point. Hope I'm making sense.
04-08-2013 | 07:32 PM
#29
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What causes belt slip is the differential acceleration speed from the motor spooling up faster then the belt can grip and pull the sc. Holding a high rpm should have no chance of slipping issues. If you mean dropping down to say 7k and then accelerating to 9k rpm then there is potential there of course because there is 2k rpm of acceleration potential and that's where peak engine power is made as well, where belt slip happens most. Holding a high rpm should not slip at all, because the sc and crank are "equalized". There is virtually no duty required from the belt at that point. Hope I'm making sense.
My 2.8", even 3.1 pulley had no chance when sustaining anything >6K RPM.
04-08-2013 | 07:40 PM
#30
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Originally Posted by s2000Junky' timestamp='1365478074' post='22460885
What causes belt slip is the differential acceleration speed from the motor spooling up faster then the belt can grip and pull the sc. Holding a high rpm should have no chance of slipping issues. If you mean dropping down to say 7k and then accelerating to 9k rpm then there is potential there of course because there is 2k rpm of acceleration potential and that's where peak engine power is made as well, where belt slip happens most. Holding a high rpm should not slip at all, because the sc and crank are "equalized". There is virtually no duty required from the belt at that point. Hope I'm making sense.
My 2.8", even 3.1 pulley had no chance when sustaining anything >6K RPM.