Rear end advice for racing with a 4 speed
I have a 22lb McLeod lightweight steel flywheel and McLeod Super Street Pro clutch.
As far as the abuse I throw at it I’m launching at 4500 and shifting at 6500 when racing.
Good evening,
I have recently been discussing clutches with some very knowledgeable stick racers. My learnings as of recent are that clutch companies want to overclutch every car out there, hence dual disc clutches being sold in large numbers. I notice you have 440hp, and a 550 HP rated clutch. Clutch companies are not wanting their clutch to slip, so high base pressures and discs with very high coefficients of friction are being spec'd. I myself fell to this kind of thinking, not knowing any better. As we speak I have pulled my rxt dual disc out of my Dart and replaced with a Borg Beck and Long PP with 2400lb static base, which will be paired with an aluminum flywheel and organic disc.
After speaking with very successful racers, the realization is that clutches have to slip, or parts break, hence soft lok full race slipper clutches. In fact I'm learning that 60 foot and ET's actually improve with some slippage, while also being much easier on mechanical parts. While I certainly don't imply you need a soft lok, perhaps re evaluate your clutch vs output.
Please be aware, I have no direct experience with these setups yet as I am in the install process currently. I simply express to you the idea to reach out to people actually running this stuff. I find it most interesting that you can call any clutch company you want, you will likely get over spec'd from every one, and likely get a different answer from various techs within the same company.
My suspicion is your parts breakage is more a clutch issue, rather than 8 3/4 weakness.