It's to heavy.....like way to heavy. Like dump truck clutch type of heavy. They are junk if you are trying to get your car to accelerate.

I like 3.90 gears. But you really need to gear it for the rpm/weight/mph/tire height you are trying to pull. On your graph i seen no layout for rpm. .....that is a must. So more info is needed and what rpm you are shifting at.

 

The answer is yes.

It is too heavy, and that adds drag to your drivetrain. Also adds load to your synchros.

It is not clamping enough.

Best recommendation is a light, multidisc clutch. Reduce your MOI and increase power transfer /reduce slippage via increased friction surface area.

 

Iv had personal experience with him... I went to him when i was young and stupid... Go to texas section and ask about em ....

 

I would recommend 4.11's or even 4.30's. You have a six speed so cruising won't be bad at all. And it sounds like the ls7 is just done. They're not known for holding up in a heavy f body with much more than stock power. They're made for a 3100lb car making 460ish rwhp.

 

+1

Ls7 clutch is poop

 

Try checking out post #2. It's a better pic of the chart. Starts at 3K or so and goes to 6800 or so. Since power is flat up there I generally shift at 6600.

Any particular ideas for another clutch? It's normally fine but after a couple gears of WOT it starts to just barely slip. The Tick master helped shifting a lot!

 

Any recommendations? Trying not to spend a whole lot as the motor ordeal took up a lot of cash. Also this clutch is barely a year old and the car sat from November to April with no motor so I need something that'll last.

 

Correct me if I'm wrong, I very well may be wrong, but isn't the same clutch used in the much heavier LS3 5th gens?

 

Not sure. But if it is, they put down what, 360ish stock?

 

It really depends on your budget. I did a RPS Carbon twin. $2k+, weighs 31 pounds, extremely reliable. I've seen guys run 19 pound clutches.

At the very least I'd go with like a McLeod street twin, monster LT1-S, or a centerforce DYAD.

Hio runs a really small tilton unit that he says his wife can drive pretty well. There's also a very light spec D clutch that I've seen handle well optimized bolt on LS1's.

A lot of these multidisc units though have very good life and also are cheap to rebuild so you never need to buy a whole clutch ever again. Mine is $400 to rebuild. Others will run as cheap as 250 to rebuild.

 

Would these clutches make up for the low numbers?

 

It can on a dyno jet.

I had an ls7 clutch in my car. I swear it slowed it down a bit, then it took out the Trans.

 

Hell even just a good single disc clutch with an aluminum flywheel will help. I like the Spec stage 3+ myself.

 

Like he said. You'll see it on a dyno jet. May or may not on a loaded dyno,

The car will rev quicker. Lighter the clutch, quicker the rev.

 

The aluminum flywheel won't decrease longevity will it?

 

Ok i checked that out. With power carrying like that you shoukd probably be shifting at 7k+
Not really

You still on a ls6 intake?
Yea they are better than nothing......the ls7 clutch being nothing. Some company makes a light aluminum housed single disc that is cost effective.
Nope

Don't be scared to drop some dime on a good light clutch. You'll thank us later.

In the end a good clutch will actually save you money.

 

Yeah it's still on the LS6 intake. It's got 55k on the motor with stock lifters. It's got titanium retainers and dual .660 springs. Would you rev it to 7k? The power flat lines doesn't it?

 

I rev my 90k ls6 with a stock cam to 7k.....and I'm about to twist on it a little harder. So yea i would . I don't like dual springs much, i woukda rather seen a good beehive or conical on it.

Just cause the power flat lines don't mean you can't take advantage of staying in a lower gear longer.

A ported fast intake would likely pick you up around 25whp. That could be why your numbers are low comparativly. What headers?

 

The car has 1-3/4 tsp stainless headers, ory, and slp loudmouth II

 

Ok....now we are getting somewhere. I suspected you had 1 3/4 headers. 1 7/8 are much better. I bet you would pick up 30whp or maybe more between the fast and larger headers

Combine that with a nice light clutch and your car is a completely different animal.