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Ls7 clutch

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Old 06-27-2006, 02:07 PM   #1
jbusmc1986
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Default Ls7 clutch

What is the max hp/tq for an ls7 clutch and what parts are needed for the swap... I will be making about 440/460 na with a 150 shot...Wil the ls7 clutch hold up?
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Old 06-27-2006, 02:15 PM   #2
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Quote:
Originally Posted by jbusmc1986
What is the max hp/tq for an ls7 clutch and what parts are needed for the swap... I will be making about 440/460 na with a 150 shot...Wil the ls7 clutch hold up?
You probably ought to do a search as there are a bazillion recent posts on this subject.
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Old 06-27-2006, 02:16 PM   #3
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150 shot on top of 460? No way it will hold that for very long.

I'd say a safe bet would be ~550 fwhp. Beyond that and you'll need something stronger.
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Old 06-27-2006, 02:43 PM   #4
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Default yikes

That was what I had figured but I hoped that I would be ok... any one know of any alternatives that arent sooo expensive that will hold about 600 rwhp?
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Old 06-27-2006, 05:54 PM   #5
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are you running DR's?
if not the 06 Zo6 clutch should be fine.



I'm not running DR's but I have found the clutch to be great and hard to tell from a stock part when driving. BTW TQ is what kills clutches not HP (well that and how you use it)


More Than Zero
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Old 06-27-2006, 11:06 PM   #6
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I have 33 passes on an LS7 clutch and the news is not favorable.

Of the dozen or so C6Z owners that I been to the track with, not one has good things to say about the LS7 clutch.

It should be fine for guys who like to drive on the street. But it hates launches and will glaze at a launch rpm over 3500 and it won't tolerate any slip even at 2500. The pedal gets hung on launch at least 25% of the time.

In contrast, I had 500 launches on C5Z with a stock LS6 clutch and it glazed twice and the pedal stuck once.

So, I don't recommend the LS7 clutch...to anyone that ever intends to launch the car.

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Old 06-28-2006, 10:52 AM   #7
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Default ooh

well that was kinda what I was expecting and with the hp and torque that I'll have that just wont hold up... I run bfg drags and love the track so I am going to be buying lots of expensive parts soon... to keep up with the go fast parts.
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Old 07-18-2006, 11:05 AM   #8
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Quote:
Originally Posted by Ranger
I have 33 passes on an LS7 clutch and the news is not favorable.

Of the dozen or so C6Z owners that I been to the track with, not one has good things to say about the LS7 clutch.

It should be fine for guys who like to drive on the street. But it hates launches and will glaze at a launch rpm over 3500 and it won't tolerate any slip even at 2500. The pedal gets hung on launch at least 25% of the time.

In contrast, I had 500 launches on C5Z with a stock LS6 clutch and it glazed twice and the pedal stuck once.

So, I don't recommend the LS7 clutch...to anyone that ever intends to launch the car.

Ranger
Bump, are there others with the LS7 clutch? I was thinking it would be a good choice until I read Ranger's critique.

I use my car for everything - daily driving, auto cross, and drag racing (in that order) so I need a clutch that can wear many hats as they say I don't plan on making but 400hp if that, and I want to stay away from SPEC because of the horror stories.
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Old 07-22-2006, 04:19 PM   #9
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Hi there,
Here is all the recent part number and pricing info!

||--Genuine GM C6 Z06 Clutch Components--||

24237690 LS7 Clutch
12571611 LS7 Flywheel

Both LS7 Clutch and LS7 flywheel are 533.30 shipped.
For both clutch and flywheel on our website, use part number ls7clutchkit under Chevrolet make.

89059282 - LS6 Slave Cylinder 101.83
12564455 - LS6 Master Cylinder 103.86
14061685 Pilot Bearing 9.53

*Clutch does work in any LS1/LS6 drivetrain but must also have ls7 flywheel. Also, can only use LS1/LS6 hydraulics.
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Old 07-22-2006, 04:37 PM   #10
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I don't recommend the LS7 clutch for any car with more than stock power. There's also a lot of post about sticking pedals with the LS7 clutch.
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Old 07-23-2006, 03:00 AM   #11
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Quote:
Originally Posted by Ranger
It should be fine for guys who like to drive on the street. But it hates launches and will glaze at a launch rpm over 3500 and it won't tolerate any slip even at 2500. The pedal gets hung on launch at least 25% of the time.

Ranger
Ouch, I'm going in next week for H/C & LS7 clutch on my '02 C5 vert.

Will only be making around 400rwhp after the upgrades and plan to run the 1/4 mile only a couple times for curiousity and bragging rights.

Wanted to do the textrilla, but the installer feels for mostly street driving where slipping the clutch is a regular occurance racing clutches aren't the way to go.

Sound's like you rev up to over 3500 rpm then drop the hammer on launch. That's certainly aggessive driving... plus adding in 33 launches... that's some serious demands from a clutch - any clutch. Just courious, if your that serious a racer... why did you ever choose the LS7 clutch in the first place?

I've heard the pedal hang up thing is a master/slave issue... isn't it fixable?

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Old 07-23-2006, 06:16 AM   #12
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Quote:
Originally Posted by SultansDiamond
...Sound's like you rev up to over 3500 rpm then drop the hammer on launch. That's certainly aggessive driving... plus adding in 33 launches... that's some serious demands from a clutch - any clutch. Just courious, if your that serious a racer... why did you ever choose the LS7 clutch in the first place?

I've heard the pedal hang up thing is a master/slave issue... isn't it fixable?....
Every clutch has its own characteristics. Clutches made by LUK have a tendency toward pedal issues, with the LS7 version being the worst offender.

The LS7 clutch is just the most finicky i've experienced, and it comes stock on the C6 Z06, so I didn't havve a choice.

The C5 Z06 clutches gave me 150-175 launches at rpm of 4000-5200. So the LS7 clutch is definitely weaker, proportionately.

Hope it works OK for you.

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Old 07-23-2006, 06:37 AM   #13
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I've got about 5k on my LS7 clutch with no problems whatsoever. I'm at 460-470RWHP and drive the pi$$ out of it but no track time.
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Old 07-23-2006, 06:54 AM   #14
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Quote:
Originally Posted by WKMCD
I've got about 5k on my LS7 clutch with no problems whatsoever. I'm at 460-470RWHP and drive the pi$$ out of it but no track time.
If you ever do take your car to the drag strip and launch with that LS7 clutch, then suggest you
(1) make a very fast release of the clutch pedal, e.g. almost no slip
(2) ensure a launch rpm <3500

That doesn't make for a good 60', but it will keep the clutch from glazing and the pedal from hanging.

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Old 07-23-2006, 08:35 AM   #15
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Quote:
Originally Posted by SultansDiamond
Ouch, I'm going in next week for H/C & LS7 clutch on my '02 C5 vert.

Will only be making around 400rwhp after the upgrades and plan to run the 1/4 mile only a couple times for curiousity and bragging rights.

Wanted to do the textrilla, but the installer feels for mostly street driving where slipping the clutch is a regular occurance racing clutches aren't the way to go.

Sound's like you rev up to over 3500 rpm then drop the hammer on launch. That's certainly aggessive driving... plus adding in 33 launches... that's some serious demands from a clutch - any clutch. Just courious, if your that serious a racer... why did you ever choose the LS7 clutch in the first place?


I've heard the pedal hang up thing is a master/slave issue... isn't it fixable?

At your power level the Spec Stage II will be fine. I"ve run mine since 2003, including 20 or more 1/4 mile runs, with drag radials. Still works fine.
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