Does this mean the 66 is now totally finished Steve? 

Stevo wrote:

Does this mean the 66 is now totally finished Steve?

Maybe for today!!!
 

TKOPerformance wrote:

Yeah, Centerforce is still making basically the same clutches they've made for decades.  There's something to be said for the "if its ain't broke.." mentality, but I've gone away from Centerforce years ago for the same issues you mention.  I think they came up with a gimmick about those centrifugal weights years ago and no one really bothered to question if that was worth anything or not.  I'm thinking not for two reasons.  First, when their patent expired why did other manufacturers not both copying it?  Second, why do none of the other clutches I've run that don't have them not slip at high RPM?

Today I'd rather use RAM, MCLeod, or SPEC (depending on the application).  There's an old school company called Clutch Masters that also gets great reviews.  No website, no email,  you actually have to call them and speak to a real living person.  They build clutches basically to order, and its not expensive like it sounds. 

The main reason I tried the centerforce clutch was those weights were supposed to help the clutch return at high rpm. With my old King Cobra clutch, shifts done at 6,000 or over resulted in the clutch pedal staying on the floor. That problem went away with the centerforce.  Hopefully that problem does not reappear with the McLeod clutch. With my milder cam I have now, hopefully that never even comes up.

Also, I did have the McLeod balanced before installing it. It was about 6 grams off.

Gary, I will try to find my receipt to get the part number. It was the basic dual friction clutch for 10.5” 26 spline.

I installed a McLeod in mine too. This is the one I used. G-Force recommended it.

https://www.summitracing.com/parts/MCL-75207

I don't have any miles on it at all yet, but clutch pedal effort feels very good moving it in the driveway.

Steve-
Did you have to modify your tunnel at all to fit the TKO?

Last edited by Chaplin (2/08/2020 3:57 PM)

This is my modified 67 floor support. I cut it into 21 pieces and welded it back together to fit as I wanted. Lots of work, but satisfied with the result.  My new tunnel, made from the side of an old five ton AC condenser frame, is about 1-1/2” taller than stock.  I custom made the lower crossmember as well. Everything was repositioned to align with the mount pad on the transmission.  Note custom notches for exhaust.
Shifter hole is cut to the side of the tunnel to allow wrench access to shifter bolts.  I used a modified Foxbody lower boot and steel boot frame.  5/16” nuts are welded below the floor to simplify installation.

I think its more that the King Cobra kind of is what it is.  Its a decent upgrade over a stock clutch, but a true high performance clutch it isn't.

I was banging gears at 7,000 yesterday in my WRX with an ACT clutch and it grabbed every time.  The ACT isn't anything spectacular, but its been a great balance of being smooth, having great grip, and living at least 60k.  AWD cars are a lot tougher to get right, because there's not much slip off the line, and the clutch is loaded a lot more (its the slip, because the tires generally don't).  Point being, just a regular diaphragm style clutch properly designed for the application.  The facings are nothing crazy either.  I had a Kevlar clutch in the thing at one point and pulled it after about 5k miles because it was WAY too aggressive.  Pretty sure ACT just does import stuff, but maybe one day they'll expand.