High gear clutch slippage

Jeff Lee · 03-03-2012, 02:58 PM

When Rob rebuilds a clutch for about $900 it's new heat shields & disk. I hear others saying that's too much so they go elsewhere and somebody takes a grinder to the surfaces and sometimes to the disk or possibly a cast off from a fuel team or maybe even a new disk. Ask, don't assume.

Use this common gear spread:
3.19
1.95
1.40
1.00

Shift all gears at 7,000 RPM
1-2 shift = 38.87 % drop = 2,721 drop = 4,280 RPM
2-3 shift = 28.21% drop = 1,975 drop = 5,025 RPM
3-4 shift = 28.57% drop = 2,000 drop = 5,000 RPM

Not sure if that helps...

I had one of my best years ever last year and I'm already ahead of 1st quarter of last year. Since I made the decision to go back in Stock, i've been pushing all parties involved. Just found out the other day the wheels I had made are not right so Monday I'm having another pair made, it will be 2 weeks. Hopefully my new custom bell housing will be done this week. Cam just received last week. Heads are done except final cut to CC spec. Short block just needs rings & bearings to assemble.
My goal is engine dyno within 3 weeks. New floors in car & fix chassis issues within 1 weeks after that. Garrett Monde is building me a new set of headers. I want everything within 90% of track readiness by end of April.
I'm changing all fuel lines, a data logger and a few other things that need to get done. Test / tune summer (aargh!), NHRA event in the fall.

03-03-2012, 02:58 PM	#26
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: High gear clutch slippage When Rob rebuilds a clutch for about $900 it's new heat shields & disk. I hear others saying that's too much so they go elsewhere and somebody takes a grinder to the surfaces and sometimes to the disk or possibly a cast off from a fuel team or maybe even a new disk. Ask, don't assume. Use this common gear spread: 3.19 1.95 1.40 1.00 Shift all gears at 7,000 RPM 1-2 shift = 38.87 % drop = 2,721 drop = 4,280 RPM 2-3 shift = 28.21% drop = 1,975 drop = 5,025 RPM 3-4 shift = 28.57% drop = 2,000 drop = 5,000 RPM Not sure if that helps... I had one of my best years ever last year and I'm already ahead of 1st quarter of last year. Since I made the decision to go back in Stock, i've been pushing all parties involved. Just found out the other day the wheels I had made are not right so Monday I'm having another pair made, it will be 2 weeks. Hopefully my new custom bell housing will be done this week. Cam just received last week. Heads are done except final cut to CC spec. Short block just needs rings & bearings to assemble. My goal is engine dyno within 3 weeks. New floors in car & fix chassis issues within 1 weeks after that. Garrett Monde is building me a new set of headers. I want everything within 90% of track readiness by end of April. I'm changing all fuel lines, a data logger and a few other things that need to get done. Test / tune summer (aargh!), NHRA event in the fall. __________________ Jeff Lee 7494 D/S '70 AMX Last edited by Jeff Lee; 03-03-2012 at 03:01 PM.