Who runs a Mantic clutch?
08-30-2021, 02:44 PM
#21
08-30-2021, 03:28 PM
#22
going from 700ftlbs to 1000ftlbs changes you from organic to metallic. Is the triple still organic? It must cost the price of a new transmission. I've driven metallic disc clutches before and they aren't bad depending on which one. The Spec 5 sucked, but it was a single disc sintered iron something or other and was miserable. Brian Nutter has the metallic twin disc in his car. He chimes in from time to time as @Summitracing . I know he's said he's fine driving it in his vette.
08-30-2021, 04:06 PM
#24
Daily driver, drag strip maybe 3 or 6 passes per year. I still don't like the idea of sending a clutch out to be rebuilt. Have to have the car sitting for a month waiting on the clutch to get back, and there is a risk of the clutch rebuild not being correct.
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ddnspider (08-30-2021)
08-31-2021, 08:27 AM
#32
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Hey there, our associate Brian Nutter put the metallic disk 1000 Ft./Lb. SUM-700903 in his C5Z. Not because the car needed the torque holding capability, but we wanted to have a firm grasp on how the clutch behaved. Pressure plate pressure on the Summit Pro Twin's is 5% stiffer than the RXT he pulled out of the car. Summit's Tq. ratings are at the wheels rather than the crank (as McLeod states), so that makes sense. The Clutch/Flywheel is 50.5 lbs. but the MOI (Moment of inertia) is far more centered for quick reving. A lot of talks with the engineer that did the cad model went into the decision to what was needed. We have had hot-shoes drive the car to a series of mid-10 passes (autocross/trackday car with a LS7 based engine) on village-bicycle 17" hoosiers and the driver proclaimed it to be one of his favorites in terms of how slippable and linear it was. This was the behavior we were looking for when we created it. A triple sounds fun and has the torque holding, but they are not happy being slipped for very long...as in going up a trailer or something like that. The Summit Pro Twin (even the metalic) is happy to be slipped inching along through a 60 second car wash example with zero sign of getting grabby or smelling or anyting like that. It's by far the best value on the market with it's Made in USA-ness and we think you will be happy with the organic even more than the metallic.
Last edited by Summitracing; 08-31-2021 at 08:34 AM.