Comparo of the LS9 flywheel and standard LS1 flywheel.



LS1:


LS9:



I'm going to a local guy tomorrow to see if he can weld/redrill the ls9 flywheel for a standard 6 bolt pattern.

EDIT: Anyone have pictures/measurements of an LS2 flywheel to see if maybe it can be used?

 

Awesome pictures. I have an LS2 flywheel/LS7 clutch combo in my car. From the looks of it, the LS9 disks are a smaller diameter. This makes sense since it is a dual disk clutch. I bet it will not take long for an after market company to come out with a hybrid flywheel. One that can accommodate the LS9 clutch and bolt to a standard 6 bolt LS1/2/3/6/7 crank.

Andrew

 

Assuming one overcame the flywheel incompatibility...Do the clutch disks themselves have compatible splines for a T56 input shaft?

 

I would assume so, but that remains to be confirmed.

Andrew

 

Another thought. What about the '09 CTS-v LSA twin clutch? It's not as stout as the LS9, but the press release claims the LSA uses a "less exotic forged crank". Maybe the LSA uses a 6-bolt crank...googling.... ;-)

Edit: Nevermind -> "steel crankshaft w/ 8-bolt flange"

 

I wish there was a picture of the actual clutch components floating around somewhere.

Andrew

 

9-bolt flange

Andrew

 

I'm ordering the dual disc clutch as we speak. Should be in, in a few days.

 

Excellent!

Mind posting the part numbers and approximate cost?

Andrew

 

LS9 Flywheel -- 12598613 -- $257
LS9 Clutch -- 24237568 -- $625

From: http://www.teamzr1.com/ubbthreads/ub...at&Number=2799

 

Did you get your parts iansane?

 

damn, thatd be a big $$ maker for GMPP. but there are twin discs out now you can buy.

i think all the zr1 parts should be in a sticky. people have asked about the blower, now the clutch/flywheel, so whats next? +1 for the sticky.

 

I didn't. I cancelled the order after talking to the guy that was going to redrill the flywheel. He said he didn't want to attempt it on cast iron. So I just went with the ls7 setup. Now I stock an LS9 flywheel. Haha.

 

Click links for high resolution.

http://gm.wieck.com/forms/gm/previewpage?049060



http://gm.wieck.com/forms/gm/previewpage?049059



http://gm.wieck.com/forms/gm/previewpage?049058



http://gm.wieck.com/forms/gm/previewpage?049057

 

Beautiful clutch.

Andrew

 

I must be blind; I see only one clutch disc. Good chance for someone interested to count the splines on the disc.

 

There are two disks. See attached picture. I have not counted the splines, but I would be very surprised if it is anything besides 26 spline. All that would be needed to use this clutch on an LS1/2/3/4/6/7 would be a custom flywheel that has the proper crank bolt pattern and the ZR1 clutch bolt pattern. The problem I see for companies like Spec, Ram or Centerforce is that developing such a flywheel would hurt their clutch sales. Perhaps Fidanza can step up to the plate.

Andrew

 

Fidanza makes clutches too.

 

Fidanza sells clutches. It would be a stretch to say that them make clutches. I would also bet that their clutch business is a fraction of their flywheel business.

Andrew

 

what of they are able to make an adapter from 6 bolt to 9 bolt and make a slightly recessed flywheel in that area and thinner in some areas so the flywheel teeth still contact the starter?