Time for new clutch, recommendations ?
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2020 Corvette of the Year Finalist (performance mods)
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because in my first post I mentioned the ls7 clutch and it ended up being a good fit for what you have
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personally I would go with a lightened (but not too light) steel flywheel, aluminum is more prone to warping... the reason you don't want to go too light is because it may dip below idle when coming to a stop and make the car want to die, may take a little more gas to get it going smoothly taking off at a light, or buck and surge while driving slowly like in a parking lot or traffic (even worse if you have a cam)
Racer
Joined: Apr 2013
Posts: 422
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From: Cypress TX
I learn so much when I read these posts,
Unfortunately I don't post up in them until I've already dropped my bundle.
I needed a clutch so I went to the local speed shop(they had cleaned up a tune for me so I figured they must be okay). We talked about my plans for the car(just for fun)and I told them I was looking at heads, cam and intake(already has LTs and vararam). Better safe than sorry so we went with 650 hp.
I'm still in the break in and my left knee feels all tingly after driving.
What next?
Thanks.
I needed a clutch so I went to the local speed shop(they had cleaned up a tune for me so I figured they must be okay). We talked about my plans for the car(just for fun)and I told them I was looking at heads, cam and intake(already has LTs and vararam). Better safe than sorry so we went with 650 hp.
I'm still in the break in and my left knee feels all tingly after driving.
What next?
Thanks.
Acct Suspended APR 2026 by request
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2020 Corvette of the Year Finalist (performance mods)
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act makes a billet steel flywheel, it came as a package with my twin setup but I'm not sure if it will work with a factory type clutch, you might give them a call and ask... I believe it weighs 15lbs
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Thread Starter
Le Mans Master
Joined: May 2008
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From: Helotes TEXAS
Drifting
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From: East Aurora NY
Safety Car
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From: Orlando FL
My son has a SPEC stage 1 clutch in his Z06, light mods - Honker cold air, shorties, B&B PRT's, ported MAF and a tune. It has been in around 5000 miles and at this point, the car is undrivable. We do not know if it is defective clutch/hydraulics or defective install. The clutch took near 4X the effort an is essentially an on/off switch. Very uncomfortable to drive in any kind of traffic. Again, the car is at a different shop awaiting rack time to determine who/what is screwed up. But it is all coming out and an LSx GM unit will be going back in. Will know more of the cause next week.
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 5,892
Likes: 47
From: Helotes TEXAS
My son has a SPEC stage 1 clutch in his Z06, light mods - Honker cold air, shorties, B&B PRT's, ported MAF and a tune. It has been in around 5000 miles and at this point, the car is undrivable. We do not know if it is defective clutch/hydraulics or defective install. The clutch took near 4X the effort an is essentially an on/off switch. Very uncomfortable to drive in any kind of traffic. Again, the car is at a different shop awaiting rack time to determine who/what is screwed up. But it is all coming out and an LSx GM unit will be going back in. Will know more of the cause next week.
By chance did you buy the SPEC super clamp pressure plate ??
My clutch kit should be here this weekend. I'm planning having it done in the next 2 weeks or so...
Keep me (us) posted on your findings, please !
And GOOD LUCK !
Safety Car
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From: Orlando FL
Will find out on the pressure plate.
Instructor
Joined: Feb 2014
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From: Lees Summit Missouri
an ls7 probably would be the cheapest and would be fine at your power level and give you a little room to grow... I would stay away from a stock ls1/ls6 replacement as they are known to cause shifting issues at higher rpms, surely you have experienced this before if you drive the car hard... if you don't want to spend a grand then you can pretty much count out a twin disc... a good aftermarket single disc would probably run in the $600-$700 range... also depends how much power you want to add in the future, if you plan on boosting it then I would go ahead and get a good twin disc now, a clutch is not a job I would want to do twice if it can be avoided
That is what I have now, and I use it for both HPDE and daily driver.
Enjoy
Thread Starter
Le Mans Master
Joined: May 2008
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From: Helotes TEXAS
Racer
Joined: Apr 2013
Posts: 422
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From: Cypress TX
I'm getting more used to mine since I started hitting the leg extension machine we have in our warehouse at work. That and deep knee bends!
Oh, and I gave $900 for my no name clutch parts
.
Thread Starter
Le Mans Master
Joined: May 2008
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From: Helotes TEXAS
But per the comment above I'm not so sure iwant to use it now....
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2020 Corvette of the Year Finalist (performance mods)
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I think you will be fine with it, I have a 15lb flywheel and I have no issues slowing down or taking off... it will buck a little bit when driving really slow in a parking lot, basically in situations when you have your foot off the gas and letting the car pull itself... I do have a cam also, if you don't have a cam I don't think you would have this issue... another thing to take into account is the overall clutch weight with the flywheel... my whole assembly is only about 10lbs less than the factory setup... if you have a 10lb lighter flywheel but 10lbs heavier on the pressure plate/disc then it will end up being just like the stock unit and you shouldn't have any issues