Cog pullies
Cog drive
Have had Vortech Cog Drive system on my 95 GT for 2 years now. Drive it at least once a week to work and out on the town. Have never had a problem with it Belt never slips like it use to with the serpentine belt....Just max boost all the time no lost boost because of slippage. Hope I can get my L down to a 7.20 1/8 mile.
That is a good point Spiro, but what if someone (me) is looking for 20+psi. of boost. I have been wondering about the cog belt drive also. I know our trucks are loosing some boost up in the high rpm range and when it shifts. That can add up to a big difference in e.t.
J.D. ,I think you and I are on the same page. It would be nice if their was an adjustable upper COG & a lower standard size COG sliperage would not be a problem.With an aftermarket rev-limeter over reving would'nt be a problem! I think it is time to call ASP. Thanx for chimming in BL
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Cog belts are not used on the street for a reason. You can cause severe damage with cogs. It's ok to drive a cog car once a week around town, but even then it's suseptable to damage.
When you are doing 5000rpm and you take your foot off the gas, two things happen. One, the throttle closes, and two the by pass opens. The by pass opens to relieve the pressure from a blower that's still turning high rpms. If the by pass happens to fail, you are no longer venting boost and the pressure backs up in the motor and tries to rip everything apart. I have seen cogged Vortechs get thier impeller blades ripped right off on hard decel with a failed by pass.
Street driven blower cars use serpentine drive belts because in the case of a failed by pass, the blower tries to lock up and the belt slips instead of the blower destroying itself. If you put cogs on the Lightning, and the by pass fails, there is no doubt the pressure backup would flex the rotors to where they contact each other and the case. That would not be good
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When you are doing 5000rpm and you take your foot off the gas, two things happen. One, the throttle closes, and two the by pass opens. The by pass opens to relieve the pressure from a blower that's still turning high rpms. If the by pass happens to fail, you are no longer venting boost and the pressure backs up in the motor and tries to rip everything apart. I have seen cogged Vortechs get thier impeller blades ripped right off on hard decel with a failed by pass.
Street driven blower cars use serpentine drive belts because in the case of a failed by pass, the blower tries to lock up and the belt slips instead of the blower destroying itself. If you put cogs on the Lightning, and the by pass fails, there is no doubt the pressure backup would flex the rotors to where they contact each other and the case. That would not be good
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