Will an LS7 clutch hold cam+nitrous in a 2600lbs car?
12-21-2007, 04:30 PM
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Will an LS7 clutch hold cam+nitrous in a 2600lbs car? Im looking at getting the LS7 clutch setup for my RX-7. The actual weight will be right around 2600lbs(with full interior). Ill be running 241 heads 150shot on a built motor. I plan on brining it to the track 2 times a month during the summer..will this clutch hold it? The car has an IRS rear end so hard launches wont be happening..im lookin for around a 1.7 60'. Again the car is 2600lbs.(not sure if that makes a difference) DO you think this clutch will hold up for the summer? Thanks-Mark
12-21-2007, 04:57 PM
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I would say yes it will. It held up behind my full weight(around 3800) TA that had H/C/I/N2O and I never had a single problem with it
12-21-2007, 10:48 PM
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Good. I don't plan on KILLING it at the track but I will be killing it on the street. I will be using drag slicks on the stock 16" wheels and maybe giving it a couple of good dumps at the track. For the price its worth seeing how it goes.
12-22-2007, 09:47 AM
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Ok. And when they say 01-02 upgraded hydraulics which parts are they actually talking about? I have a new US brake upgraded clutch master cyl.(required in the conversion)(its 3 times the size of the stock one) and I have the old slave off of the 2000 TA that the tranny came with...
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12-22-2007, 10:03 AM
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Ok. And when they say 01-02 upgraded hydraulics which parts are they actually talking about? I have a new US brake upgraded clutch master cyl.(required in the conversion)(its 3 times the size of the stock one) and I have the old slave off of the 2000 TA that the tranny came with...
12-22-2007, 05:31 PM
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FWIW, last night I went a 1.655 sixty foot in my Z06 and my race weight was right around 3,370'ish. I'd suggest some quick/smooth clutch engagement instead of a dump. It's not the best drag race clutch, but IMHO it holds GREAT and the street manners are awesome. If/when I upgrade it will be to a twin disc.
12-22-2007, 05:53 PM
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I have heard of a few guys running the LS7 clutch in FDs, but a couple of people have had issues at the drag strip after repeated passes when the clutch heats up and starts to slip badly. I have a Trex cammed forged LSx in my car and plan on using nitrous and decided to run a Spec stage 3+ in it since I have had good results in 400+ whp f-bodies with the same clutch, and my car, like yours weighs in under 2700lbs. In the end the decision is completely up to you, I just don't trust a clutch rated for a 505 fwhp engine to hold in a car planning to run over 500whp, especially a car that is going to be drag raced. IMO I would run a better aftermarket clutch like I did and not have to worry about it. My car has very smooth engagement and holds anything I can throw at it. I'm not doubting the LS7 clutch, but it is a factory clutch and wasn't made for drag racing.
12-23-2007, 01:04 AM
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I have heard of a few guys running the LS7 clutch in FDs, but a couple of people have had issues at the drag strip after repeated passes when the clutch heats up and starts to slip badly. I have a Trex cammed forged LSx in my car and plan on using nitrous and decided to run a Spec stage 3+ in it since I have had good results in 400+ whp f-bodies with the same clutch, and my car, like yours weighs in under 2700lbs. In the end the decision is completely up to you, I just don't trust a clutch rated for a 505 fwhp engine to hold in a car planning to run over 500whp, especially a car that is going to be drag raced. IMO I would run a better aftermarket clutch like I did and not have to worry about it. My car has very smooth engagement and holds anything I can throw at it. I'm not doubting the LS7 clutch, but it is a factory clutch and wasn't made for drag racing.
I know what you mean. I only plan on having the clutch last one summer..and at the track I dont hotlap...ill get maybe 3-4 runs in max then I go home. The car will mainly be driven on the street this year and its just something I dont want to have to worry about.
12-23-2007, 12:09 PM
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Yeah I cant wait. The motor will handle a 250 shot..but I want to make sure the car is 100% before I do that plus the clutch won't hold it. I might even swap the clutch out mid-season..I kinda just want to get it running now. Its got stock 243 heads/MS3 cam, forged rods/pistons,studs and a few other little things...so im hoping for at least 400rw on motor then with the 150 or two stage 200/250 shot it should really move.
12-23-2007, 12:20 PM
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It should hold that kind of power fine. My Z06 is making ~500 to the wheels on the motor and ~600+ to the wheels on the bottle and has ~9,600 miles on it with zero issues. Putting heat into any clutch will kill it pretty quick. A 250 shot won't be an issue if the on/off points are tuned and you back off the throttle during shifts. Of course, I wouldn't recommend bolting on a set of slicks and launching on the bottle, but you said you'd be happy with 1.7 sixty foots. You'll be able to do that with a bogged launch on drag radials.
You're gonna have one sick little ride.
You're gonna have one sick little ride.
12-23-2007, 12:58 PM
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It should hold that kind of power fine. My Z06 is making ~500 to the wheels on the motor and ~600+ to the wheels on the bottle and has ~9,600 miles on it with zero issues. Putting heat into any clutch will kill it pretty quick. A 250 shot won't be an issue if the on/off points are tuned and you back off the throttle during shifts. Of course, I wouldn't recommend bolting on a set of slicks and launching on the bottle, but you said you'd be happy with 1.7 sixty foots. You'll be able to do that with a bogged launch on drag radials.
You're gonna have one sick little ride.
You're gonna have one sick little ride.
12-23-2007, 10:58 PM
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