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Dual Mass Machining Scheme

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Old May 24, 2008 | 04:38 AM
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Default Dual Mass Machining Scheme

I've got a machining scheme for the Dual Mass flywheel that I am having a local Machine Shop try. It involves 3/8-16 X 5/8 set screws (Lowes) used to lock the 2 halves of the dual mass together. I'm using the pressure plate holes and have the machinist using a small end mill in 2 of the 6 holes to create a pocket for the set screws spaced 180 degrees apart to clock the two halves. The 4 other set screws provide additional points of contact to allow the machinist to get both plates parallel. The set screws are tightened to apply tension between the 2 halves. He's to use the 6 pressure plate mounting tabs to index the two halves and will use a dial indicator to "zero out" the distance between the two plates. Then He'll chuck it up and cut the surface. He thinks my idea might work. If it does I'll post my sucess. His shop is very busy so I gave him a few weeks time to try my "science project".

Larry
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Old May 24, 2008 | 03:24 PM
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good luck
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Old May 24, 2008 | 05:41 PM
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A local shop had a jig he used and was able to machine my Dual mass the only problem I had is after 120K the cushions were worn out and it made a ton of noise.
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Old May 24, 2008 | 05:48 PM
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and if it doesn't work, you have to yank the tranny again
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Old May 24, 2008 | 05:54 PM
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There was a guy in Kansas City that used to do that. I was told they are machined on a taper, not just level across. Don't know if that is true or not.
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Old May 30, 2008 | 11:04 PM
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Default The machinist was sucessfull !!!

I just picked up the flywheel from the machinist. He was able to get it to work using the set screws to stabilize the two surfaces and he used a dial indicator at the center and each of the 6 tabs to zero out the flywheel for machining. He did wind up with a 4 thousandths taper because of how the flywheel reacts when being machined. But all in all the flywheel looks great. The cost was $85 dollars. That plus the core and shipping which was $91 from a fellow forum member and I have alot less into the flywheel than a new one. I also won't get the gear noise like the Camaro or Aluminum 1 piece setups get when coupled to a ZF transmission.

For those near Corpus Christi who want to try to resurface a dual mass Corvette flywheel here is the contact data:

Harbor Engine & Grinding, Inc.
2845 Agnes Street
Corpus Christi Texas, 78405

phone (361) 882-1571 or 1-800-256-7637

Larry
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Old May 31, 2008 | 12:25 AM
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Originally Posted by SPD KILS
There was a guy in Kansas City that used to do that. I was told they are machined on a taper, not just level across. Don't know if that is true or not.

Any clue who?
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