with what you said 100%; however, I love my aluminum FW. 
Clutch Options???
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Wow thank you everyone for the great information. The more I learn the more questions i have.
1) what is the clutch spring for?
2) what is the "feel" difference between spring and no spring?
3) do i want the lightweight flywheel?
Joe G: If i put the car in 5th gear at a low speed the rpm's climb, the car does not "bog down" as it normally would. Also It smells like hot clutch when i get out.
1) what is the clutch spring for?
2) what is the "feel" difference between spring and no spring?
3) do i want the lightweight flywheel?
Joe G: If i put the car in 5th gear at a low speed the rpm's climb, the car does not "bog down" as it normally would. Also It smells like hot clutch when i get out.
You should clean the fluid as I linked above, it's possible your slave is stuck not releasing all the way and you might get it cleaned out.
I'm not optimistic but you have nothing to lose but a $4 bottle of Dot 4 and a few minutes of your time.
Burning Brakes
Joined: Nov 2009
Posts: 1,157
Likes: 1
From: Oxford Pa
Wow thank you everyone for the great information. The more I learn the more questions i have.
1) what is the clutch spring for?
2) what is the "feel" difference between spring and no spring?
3) do i want the lightweight flywheel?
Joe G: If i put the car in 5th gear at a low speed the rpm's climb, the car does not "bog down" as it normally would. Also It smells like hot clutch when i get out.
1) what is the clutch spring for?
2) what is the "feel" difference between spring and no spring?
3) do i want the lightweight flywheel?
Joe G: If i put the car in 5th gear at a low speed the rpm's climb, the car does not "bog down" as it normally would. Also It smells like hot clutch when i get out.
Typically people will recommend a steel flywheel over a light weight aluminum if you drag race and lighter for road coarse.. Steel will rev slower eat some HP compared to aluminum but the steel well help keep your rpms up on hard launches..(If someone feels I am wrong on this feel free to correct me)
Race Director
Joined: Apr 2005
Posts: 10,436
Likes: 4
From: Everett Wa
All Corvettes use the same 14" diameter flywheel 6 bolt EXCEPT for the LS9(ZR1) and LSa engines(Caddy and Camaro). They are also 14" but the LSa is a 8 bolt and the LS9 is a 9 bolt.
Z06 clutch will fit the LS2/3 with no new flywheel required.
If you want to use the twin disc clutch from the LS9, you must purchase a new flywheel that will match the twin disc pressure plate but has 6 holes to match the LS2/3/7 crankshaft. Using the LS9 clutch also requires using the LS9 slave cylinder.
Several aftermarket companies sell a complete package(clutch, flywheel, slave cylinder) to allow the LS2/3/7 owner to use the LS9 twin disc clutch. There are two different LS9 clutches, one has a little more clamping pressure. The LS9 clutch works perfect for street driving. No light bulb on/off or chatter.
Z06 clutch will fit the LS2/3 with no new flywheel required.
If you want to use the twin disc clutch from the LS9, you must purchase a new flywheel that will match the twin disc pressure plate but has 6 holes to match the LS2/3/7 crankshaft. Using the LS9 clutch also requires using the LS9 slave cylinder.
Several aftermarket companies sell a complete package(clutch, flywheel, slave cylinder) to allow the LS2/3/7 owner to use the LS9 twin disc clutch. There are two different LS9 clutches, one has a little more clamping pressure. The LS9 clutch works perfect for street driving. No light bulb on/off or chatter.
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Why would a LS9 clutch operate any different behind a LS3 or LS7 vs a LS9?
Race Director
Joined: Apr 2005
Posts: 10,436
Likes: 4
From: Everett Wa
As for why it is different I can't say because I have not driven a ZR1 or a Z06 with a LS9 clutch installed. I am just saying there is a diference between a stock LS3 clutch and the LS9 setup. Twin disk, lighter setup, more grabbing power or just my imagination.
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Le Mans Master
Joined: Nov 2005
Posts: 7,058
Likes: 365
From: Kendall Park NJ
Modulate refers to the ability to slip the clutch whether it is starting from a stop at a traffic light or launching at the drag strip. Some clutches can chatter due to their design and friction material. This would be unfriendly for street applications. In any event, you would not an On/Off switch type of clutch for your Vette.