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Spec 3+. Do I need a new flywheel?

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Old Jan 22, 2010 | 07:31 PM
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Default Spec 3+. Do I need a new flywheel?

Hello,

Was wondering if a spec flywheel is needed when installing a spec 3+ clutch. Or can I use a stock flywheel?

Thanks!
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Old Jan 22, 2010 | 07:39 PM
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I myself wouldnt use the stock flywheel.
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Old Jan 22, 2010 | 07:48 PM
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Originally Posted by 69dodgecharger
Hello,

Was wondering if a spec flywheel is needed when installing a spec 3+ clutch. Or can I use a stock flywheel?

Thanks!
Use the stock flywheel, but get it surfaced by a shop before you put it in. I personally bought a new flywheel and hit it and my cltuch disc with a DA(hand sander) with 500 grit. I would also go ahead and buy some ARP flywheel and pressure plate bolts because they are neccessary and cheap, trust me... Also replace everything that the kit comes with, TO bearing, Pilot bearing, and make sure you use the shim that the kit comes with.

All of this comes from experience.
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Old Jan 22, 2010 | 07:52 PM
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Originally Posted by Blown 346
I myself wouldnt use the stock flywheel.
Why exactly? Is it a strength issue?
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Old Jan 22, 2010 | 07:53 PM
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Originally Posted by Roger Z06
Use the stock flywheel, but get it surfaced by a shop before you put it in. I personally bought a new flywheel and hit it and my cltuch disc with a DA(hand sander) with 500 grit. I would also go ahead and buy some ARP flywheel and pressure plate bolts because they are neccessary and cheap, trust me... Also replace everything that the kit comes with, TO bearing, Pilot bearing, and make sure you use the shim that the kit comes with.

All of this comes from experience.
Ya I am aware of replacing all of the parts, and getting the ARP bolts ect... However, I thought that the shim was only needed on F-bodys and twin disk specs
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Old Jan 22, 2010 | 08:01 PM
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Originally Posted by 69dodgecharger
Ya I am aware of replacing all of the parts, and getting the ARP bolts ect... However, I thought that the shim was only needed on F-bodys and twin disk specs
Well I put the shim on my car and it works great, I am pretty sure there was a thread about this, search and see what you come up with. But all in all use the stock flywheel and get it resurfaced/buy a new stock one and sand it a bit.
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Old Jan 22, 2010 | 08:12 PM
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Originally Posted by Roger Z06
Well I put the shim on my car and it works great, I am pretty sure there was a thread about this, search and see what you come up with. But all in all use the stock flywheel and get it resurfaced/buy a new stock one and sand it a bit.
Ya there was, I was reading it, I need to read the rest of it LOL.
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Old Jan 22, 2010 | 08:13 PM
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http://www.ls1tech.com/forums/manual...need-shim.html
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Old Jan 22, 2010 | 08:18 PM
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Old Jan 22, 2010 | 10:39 PM
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Originally Posted by 69dodgecharger
Why exactly? Is it a strength issue?


Strength could play a part depending on how much HP your car makes. I have noticed a stock flywheel cant take the abuse a aftermarket one can. They are made to be more durable and handle and dissapate heat faster than a stock one.
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Old Jan 23, 2010 | 12:51 AM
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I installed a Spec stage 2 and Flywheel on my 98 Coupe a few months ago,and didn't use the shim-I used the ls1Tech link in the posts above to take the proper measurements,and it worked out sweet-
Right at first,the engagement was a little close to the floor,but after about 600 miles,it ended up at the middle of pedal travel,which is right where I want it.
If you use the shim and you don't need it,your clutch is going to slip after it gets broken in,so take those measurements carefully,or you'll be back in there to pull out the shim.
I was "back in there" after 2 months,but only because I fubared the pilot bearing while reinstalling the drivetrain,so be careful with that thing,too.
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Old Jan 23, 2010 | 08:45 AM
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Originally Posted by Blown 346
Strength could play a part depending on how much HP your car makes. I have noticed a stock flywheel cant take the abuse a aftermarket one can. They are made to be more durable and handle and dissapate heat faster than a stock one.
Could you explain a bit more about that "dissipate heat faster than a stock one" point?
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Old Jan 23, 2010 | 04:49 PM
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Originally Posted by ipuig
Could you explain a bit more about that "dissipate heat faster than a stock one" point?


After doing research with my setup, I was told by several clutch manufacturers, that the stock flywheel cant take as much heat as the aftermerket flywheels can. They are made to withstand more heat and less chance of the flywheel getting hot spots, or blueing.

This is what the textrailia told me when I was looking into a new Z06 clutch setup. Not sure if they were just blowing smoke to get me to purchase the setup or what. It sounded right and made sense.
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Old Jan 23, 2010 | 05:38 PM
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Well with the shim mine catches right at the top, exactly where i want for racing.
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