Thread: TKO600 clutch
View Single Post
  #17 (permalink)  
Old 09-09-2009, 07:36 PM
RodgerH RodgerH is offline
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Nov 2006
Location: Charleston, WV
Cobra Make, Engine: SPF 2592, Shelby alum. 527
Posts: 325
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
But where are you going to get them? They're almost custom now. -- I agree using the ARP OEM shouldered bolts are not going to give you a safe amount of threads.
That's what bugs me. I know I'm not the only person using McLeod's aluminum flywheel, and I can't believe others haven't checked the bolt length...and been concerned.

The guy at ARP was real helpful and took some time to look at the engineering data on their computer, and made a couple of trips to the warehouse to look at bolts.

One possibility we came up: Use their 5/16-18 x 1-1/4" ARP2000 (225,000 lb. tensile strength) 12-point bolt, which has a shoulder length of 0.425". Used in combination with one of their 0.120" thick washers, this would put the bottom of the bolt shoulder 0.075" above the bottom of the counterbore in the flywheel, while providing the same thread length I have now.

Another option I found today is to use these Mr. Gasket fasteners:

http://www.summitracing.com/parts/MRG-911/

The overal length is 1/4" shorter, so I would have that much less thread engagement, but if the shoulder length is adequate they should work.

Rodger
Reply With Quote