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Ls7 Clutch Hold 6K CLutch Dumps on Occasion?

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Old 03-30-2008, 09:28 AM
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Default Ls7 Clutch Hold 6K CLutch Dumps on Occasion?

I have a h/c/i ls1 and im trying to figure out if the ls7 clutch is for me. I wanna hear from people who know not just guessing. The car will see the drag strip maybe 1 weekend a month and will be taking off at about 6k with 4.10s or 4.30s on a 26 inch drag radial. The car makes 460 rwhp n/a and will have a 150 shot on it one day.
Old 03-30-2008, 11:15 AM
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Mine holds fine. I have hoosier qtp's and I dump it at 6200 and above.
Old 03-30-2008, 11:21 AM
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mine i slipping with about 3000 miles and maby 10 passes at the track. I should be around 430 rwhp.
Old 03-30-2008, 07:44 PM
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Originally Posted by ss2000
Mine holds fine. I have hoosier qtp's and I dump it at 6200 and above.
What 60 ft are you cutting? How many miles on your clutch?
Old 03-30-2008, 07:46 PM
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probably not for long. i am worried about doing that here soon...
Old 03-30-2008, 08:16 PM
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Well what would be better a spec 3 or ls7 for the track?
Old 03-30-2008, 08:20 PM
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Originally Posted by ss2000
Mine holds fine. I have hoosier qtp's and I dump it at 6200 and above.
hey im curious about your times...with 4.30s and ms4 hc car making 460whp , shouldnt you be in the 10s? I also have the same LS7 clutch with aluminum FW...
Old 03-31-2008, 02:30 AM
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Originally Posted by 96lt1ss
I have a h/c/i ls1 and im trying to figure out if the ls7 clutch is for me. I wanna hear from people who know not just guessing. The car will see the drag strip maybe 1 weekend a month and will be taking off at about 6k with 4.10s or 4.30s on a 26 inch drag radial. The car makes 460 rwhp n/a and will have a 150 shot on it one day.
I dont think thats the right clutch for you, the LS7 clutch is not good for launches above 4k especially with DR's. You will be around ~600 rwhp with the 150 shot and thats way over what they are rated at. Spend the extra few 100 bucks and get a better known clutch to handle the power
Old 03-31-2008, 06:30 AM
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Originally Posted by 96lt1ss
What 60 ft are you cutting? How many miles on your clutch?
my best last year was a 1.600. tires were pretty much shot.
Old 03-31-2008, 06:33 AM
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Originally Posted by LSGunZ28
hey im curious about your times...with 4.30s and ms4 hc car making 460whp , shouldnt you be in the 10s? I also have the same LS7 clutch with aluminum FW...
yeah, i should be in the 10's. hopefully with new tires and sorting out my suspension will get me there.
Old 03-31-2008, 07:22 AM
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I would not suggest it. Sure some might be doin it but this clutch is just a OEM GM clutch. Not a aftermarket upgraded clutch built for racing. Yes, it is a upgrade over our stock LS1 clutch set-up, but I would say invest in a good aftermarket unit made for racing & your demands.

The LS7 clutch is ideal for street driving & some track useage. But if your gonna put it thru heavy track duty, you really need to spend a little more. If you want great pedal feel & all the holding power your gonna need spend the money on a Twin disc set-up & don't look back.
Old 03-31-2008, 07:46 AM
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Its a matter of time before it blows.

Do not expect it to last forever.
Old 03-31-2008, 08:18 AM
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Originally Posted by BlackScreaminMachine
Its a matter of time before it blows.

Do not expect it to last forever.
When I put my ls7 clutch in, I was cam only (f13). I also only put about 600 miles on a year. When this one goes I will step up to a better clutch. It does still seem fine though, but when it grenades, my Mcloud bell housing better pay off.
Old 03-31-2008, 09:29 AM
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So would the spec 3 be better at the track?
Old 03-31-2008, 06:58 PM
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it will hold but put significant wear on the clutch after only a few dumps.
i hope you don't have a 10 bolt
Old 04-01-2008, 06:51 PM
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Originally Posted by hndakilr
it will hold but put significant wear on the clutch after only a few dumps.
i hope you don't have a 10 bolt
Nice avatar

Hey Btw, Ive probably done almost 50+ clutch dumps above 5500 rpms on the LS7 clutch and aluminum FW when I was 360ish rwhp.... through 3.73s and a 3350 - 3400lb car without driver weight included (250lb) and It doesnt slip yet and has around 10,000 miles on it Im assuming. I cant remember really when I installed it, RO is in the car, which isnt by me now... But all I know is after my 432whp after H/C my clutch pedal was sinking halfway, but Im sure thats from air getting in my hydraulic system after I did the H/C I didnt bleed it...
Old 04-02-2008, 10:17 AM
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im not 100% on this but the fact that you have an aluminum fw might have helped you out.
less f/w inertia= easier for the clutch to grab

gotta love the hillbilly avatars
Old 04-02-2008, 12:10 PM
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Originally Posted by ss2000
When I put my ls7 clutch in, I was cam only (f13). I also only put about 600 miles on a year. When this one goes I will step up to a better clutch. It does still seem fine though, but when it grenades, my Mcloud bell housing better pay off.
LOL. I hope it does too.
Old 04-02-2008, 12:12 PM
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I dont know from experience but I wouldnt think the LS7 clutch would stand up to that kind of abuse. Textralia is expensive but I have heard good things, but I dont have first hand exp. with either. My LS7 clutch is going in next week.
Old 04-03-2008, 10:18 PM
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11 passes and mine is fried.



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