833 hold up to 500hp RB

BadBee said

Back in the Day the only clutch that took my beatings was a Webber 3600 lb, I used on the track/street, Hitched to an 18Spline Hemi 4Speed hooked to a '67/440 x 6 in a '69 Bee dynoed out at 585 H.P That clutch stayed together when others SH-t the bed!! I stayed
With that set up till I sold it, but I did break a FEW other things, Now I'm starting all
Over again so Im ALL EARS!!!

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And that is why stuff broke. There is no reason to EVER run that kind of base pressure. All it does is crack the firewall, bend the clutch linkage and flex the cover itself.

Today, if you want a rag disc, you can use 2200 pounds and not break parts. The best way is a sintered iron disc and 600-700 pounds of base. The pressure is what breaks parts. It's no different than a hammer. If you consider RPM as the speed you swing the hammer it becomes clear. At the same RPM, 3600 pounds hits way harder than 2200 pounds and that hits harder than 600 pounds.

Don't beat the car to death with a high pressure clutch or a metallic disc.