Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

Getting rid of the stupid dual mass flywheel

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Old 02-12-2012, 03:53 PM
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Who says the aluminum is too light? My whole clutch weighs 35lbs and it's moment of inertia is closer to center than an LS7 and it drives just fine.
Old 02-12-2012, 04:56 PM
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Originally Posted by BudRacing
I'll vouch for the LS7 setup working well without a spacer. The engagement may be closer to the floor while breaking it in, but after about 1000k miles it should be right in the middle.
I think I'd go insane before ever hitting the "1000k mile" break in lol

I get what you're saying though

Also, thanks to 54inches for being a stand up guy and posting links and prices for the LS7 clutch kits.

That's good info for the future, I certainly appreciate it!

-meaty
Old 02-12-2012, 09:24 PM
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Originally Posted by raven154
Who says the aluminum is too light? My whole clutch weighs 35lbs and it's moment of inertia is closer to center than an LS7 and it drives just fine.
Me. There is some truth to the fact that a stock V needs some weight in the flywheel to get it moving. I think most of us agree that the factory over=engineered this area and with that extra weight comes some trade-offs that we all know about.

Lightening it is great, but a flywheel that is TOO light is a bad idea.

My statement was regarding STOCKish cars with stockish power, not a Maggied V. Apples and Oranges my friend.

Originally Posted by meatyCTS-V
I think I'd go insane before ever hitting the "1000k mile" break in lol

I get what you're saying though

Also, thanks to 54inches for being a stand up guy and posting links and prices for the LS7 clutch kits.

That's good info for the future, I certainly appreciate it!

-meaty

Anytime meaty! After scouring both forums forever, I thought it would be better to put it down in one place to help for the future.....

As soon as I get my supplies in, I am going to HOPEFULLY post install photos of everything....
Old 02-12-2012, 10:23 PM
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I used to work with a bunch of old hill-billy ex dirt track guys (they used to run around with Morgan Shepard back in the day) and they swore up and down that anything heavier than what the engine needed to idle was too much. Not saying that this is right or wrong, but funny how things have changed.
Old 02-13-2012, 03:26 PM
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Originally Posted by raven154
Who says the aluminum is too light? My whole clutch weighs 35lbs and it's moment of inertia is closer to center than an LS7 and it drives just fine.
Just wondering If I do plan to do FI should I go with the lighter flywheel for the ls7 clutch setup? (think its the RAM wheel they use or something like that)
Old 02-13-2012, 03:35 PM
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I ran a Fidanza 12.5lbs aluminum flywheel and LS7 when I was still N/A and I loved it. No drivability issues at all.
Old 02-13-2012, 04:02 PM
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I've encountered the same story about "aluminum flywheels are too light for street cars" with each of my cars. My torque-monster N/A Subaru has a 9.5# Fidanza (stock was ~22#), and my Mustang has an 11.5# Fidanza (not sure what that stocker weighed). I've never had any drivability issues with either.

I just ordered the Scoggins-Dickey LS7 kit with the RAM aluminum flywheel. I debated doing the LS9X setup from Katech, but I really don't need it. I might change my mind, though.
Old 02-13-2012, 05:05 PM
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Originally Posted by AAIIIC
I've encountered the same story about "aluminum flywheels are too light for street cars" with each of my cars. My torque-monster N/A Subaru has a 9.5# Fidanza (stock was ~22#), and my Mustang has an 11.5# Fidanza (not sure what that stocker weighed). I've never had any drivability issues with either.

I just ordered the Scoggins-Dickey LS7 kit with the RAM aluminum flywheel. I debated doing the LS9X setup from Katech, but I really don't need it. I might change my mind, though.
Definitely let us know how it works out. I have been following these clutch/flywheels threads for a while now seems to be conflicting info on the lw flywheel and if the fw and clutch need to be balanced.
Old 02-13-2012, 10:11 PM
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Me too! I am thinking the lightweight flywheel MAY wear out the disc quicker, but that is just a hunch.

I am merely going off what GM intended fornthe vette and using that as a basis for our car. There are no definites in this swap, so I think all the info we can get in one thread is going ton help; as long as it pertains to the V.
Old 02-14-2012, 08:24 AM
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Thanks for all the help guys. I'm going to have to hold off on changing the flywheel for a little bit longer because I just picked up a 5 speed transmission for my Corvette. I can live with the vibrations in the V a little longer, but I can't take driving the Corvette another season with that damn 3 speed auto.
Old 02-14-2012, 11:56 AM
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Are they any viable solutions for those of us don't need the peformance upgrade, but would JUST like to dump the dual mass flywheel?

It seems like GTO parts or G8 GXP parts would be compatible. Second hand parts seem plentiful and it doesn't look like they get hit with the Caddi tax.
Old 02-14-2012, 01:20 PM
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just hope someone throws this ls7 lightweight setup in before the sale ends so I can grab me one 2 if all is well.
Old 02-14-2012, 01:20 PM
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Originally Posted by CarbonCrew
Are they any viable solutions for those of us don't need the peformance upgrade, but would JUST like to dump the dual mass flywheel?

It seems like GTO parts or G8 GXP parts would be compatible. Second hand parts seem plentiful and it doesn't look like they get hit with the Caddi tax.
LS7 Clutch and flywheel.
Old 02-14-2012, 03:48 PM
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My ls7 kit from lindsay just showed up today ,shooting for a Sunday install
Old 02-14-2012, 05:21 PM
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Originally Posted by kl2onik
just hope someone throws this ls7 lightweight setup in before the sale ends so I can grab me one 2 if all is well.
are you talking about the sale from east coast corvettes?
Old 02-14-2012, 09:07 PM
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What sale?
Old 02-14-2012, 10:27 PM
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East coast corvettes has a sale on ls7 setups for $435
Old 02-15-2012, 10:44 AM
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I installed a LAPD bleeder when I replaced my clutch with the Monster stage 3 and can't imagine going back to bleeding the slave next to the bell housing. Been there, hated every second of it. Get a bleeder!!

I also have a 18 lb flywheel and LOVE it. Highly recommended.

Also, a clutch job should cost closer to $300.
Old 02-15-2012, 10:48 AM
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Originally Posted by wcryan
East coast corvettes has a sale on ls7 setups for $435
I cannot find the link anywhere, so can you help a brother out.

I swear I searched, but obviously not in the right area.
Old 02-15-2012, 10:55 AM
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https://ls1tech.com/forums/corvette-...l#post14184634

If you scroll to the end, A couple days ago it was mentioned that the sale was still going on


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