LS7 Clutch Heavy slow revs?
10-17-2016, 01:06 PM
#1
LS7 Clutch Heavy slow revs?
Getting a clutch replaced because of a leaking slave cylinder. Anyway trying to decide which clutch. Probably going to have the blocker synchro's changed too. Piece of crap 97 rings!
Only have a K&N cold air on it now. All stock. The most may be a cat back exhaust later. So I don't need a 1000ft lb. clutch. I see a lot of people going to the LS7. However I have also read that they weigh 8-10lbs heavier. I have used lightened crank pulleys on other cars and know that this helps add performance or quickens the revs. So why put this much more weight on the rotating mass making an LS1 lazier than stock?
Would the LS6 (ZO6) stock clutch work and with less weight? That one was to hold up to 385ft lbs torque for the LS6. I am stock 345hp (1997) so maybe 350 hp at best (K&N Mentioned) and probably no change in torque at 350ft lbs.
Is the LS2 the same clutch as the LS6?
Only have a K&N cold air on it now. All stock. The most may be a cat back exhaust later. So I don't need a 1000ft lb. clutch. I see a lot of people going to the LS7. However I have also read that they weigh 8-10lbs heavier. I have used lightened crank pulleys on other cars and know that this helps add performance or quickens the revs. So why put this much more weight on the rotating mass making an LS1 lazier than stock?
Would the LS6 (ZO6) stock clutch work and with less weight? That one was to hold up to 385ft lbs torque for the LS6. I am stock 345hp (1997) so maybe 350 hp at best (K&N Mentioned) and probably no change in torque at 350ft lbs.
Is the LS2 the same clutch as the LS6?
Last edited by jarnold; 10-17-2016 at 01:08 PM.
10-18-2016, 12:20 PM
#2
No one has any idea of the weight differences?
No response? No one has experience with the LS7 clutch weight. Also wondering if the LUK Pro Gold 04-905 is the same clutch so the same weight?
10-18-2016, 12:49 PM
#3
Team Owner
I just put in an LS7 clutch but with the aluminum flywheel. I wasn't aware you could put it on the stock steel flywheel but I'm not up on such things. Mine certainly isn't lazy, and iirc, the LS7 weighs less (w/proper alum flywheel) than stock.
10-18-2016, 01:48 PM
#4
Aluminum Flywheel
They have a kit with the stock type flywheel and that makes it heavier than original. C6 or LS2 would be good compromise I would think? They are 400 ft lbs and 400hp where as my 97 is 50 less on both ends.
Last edited by jarnold; 10-18-2016 at 01:50 PM.
10-18-2016, 02:32 PM
#5
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personally I wouldn't use an aluminum flywheel, the weight savings is an advantage but aluminum is more prone to warping under high heat which the clutch will see if you drive the car hard... now if you don't drive the car very hard then you would probably be fine since it won't ever get that hot... I would rather use a lightened billet steel flywheel if it were going in my car
10-18-2016, 08:12 PM
#6
Team Owner
Yes I know about the Aluminum flywheel with the LS7 Clutch. Was yours the Fidanza and was their modifications and or a different Slave cylinder needed? Not going to go crazy with any power adders and want to keep it priced on the down low. Don't want the extra weight which they say will make it a bit lazy.
They have a kit with the stock type flywheel and that makes it heavier than original. C6 or LS2 would be good compromise I would think? They are 400 ft lbs and 400hp where as my 97 is 50 less on both ends.
They have a kit with the stock type flywheel and that makes it heavier than original. C6 or LS2 would be good compromise I would think? They are 400 ft lbs and 400hp where as my 97 is 50 less on both ends.
@Neutron,
I'm not sure what you mean by using it hard. I should think you'd need to slip it a TON in order to get it hot. My last 6 spd car, bought new and w/155k miles on it, did not have so much as a wear mark on the flywheel (and I own a machine shop and resurface flywheels regularly). I would go out on a limb and say I don't slip my clutches much.
