#1  
Old 05-10-2021, 01:50 PM
70ra455's Avatar
70ra455 70ra455 is offline
Ultimate Warrior
 
Join Date: Sep 2004
Location: Canton, Michigan
Posts: 2,147
Default Clutch/PP Recommendation

I'm looking for a recommendation for clutch and pp for my 66 GP 421 tripower, Muncie m-20, about 470-500 lbs torque ...

a friend recommends the SPEC brand and I also looked at LUK and Centerforce ...

I'm looking for street ability and longitivity ... I drive fairly quick but I'm not pounding the clutch very much or racing.

The one that was in the car ... Viteon ... was working great but I've got putting on it in only 500 miles and it was brand new at the time.

My engine leaked oil and wet the clutch and flywheel. Pitting on the PP and hot spots on the clutch. I'm going to have the flywheel lightly recut again. I was told that getting PP recut is hard to find guys today.

I just want to get this right and get "carefree" deriving time.

Thanks in advance

P.S. just spoke to Centerforce and they don't have anything spec'd for the 421 ... they buy the Viteon and upgrade it and call it a Centerforce ... kit # CF523516

I'm attaching pictures of what my current stuff looks like.
Attached Thumbnails
Click image for larger version

Name:	20210508_094340.jpg
Views:	89
Size:	80.6 KB
ID:	566320   Click image for larger version

Name:	20210508_094627.jpg
Views:	82
Size:	72.3 KB
ID:	566321   Click image for larger version

Name:	20210510_134607.jpg
Views:	90
Size:	98.7 KB
ID:	566322   Click image for larger version

Name:	20210510_134619.jpg
Views:	64
Size:	99.3 KB
ID:	566323  

__________________
1970 GTO Convertible 455 Ram Air M-21, Atoll/Blue/Black, Hood Tach, 3:31 12-Bolt Posi, A/C, Console

1966 Grand Prix 421 Tripower 4spd, Marina Turquoise/Turquoise, a/c, console, posi, reverb. pa, pb, ps, remote mirror, mats

2010 Dodge Challenger R/T Classic, 6spd Hemi, Detonator Yellow, black stripe, black leather
  #2  
Old 05-11-2021, 07:09 AM
barrierblue66's Avatar
barrierblue66 barrierblue66 is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Location: Wake Forest, NC
Posts: 906
Default

Phil, interesting Centerforce told you that. You running the 11" flywheel I'm guessing? I have the 10.4" in my Safari and run Centerforce II PP and disc. Thats what was in the car when I bought it so I replaced it 2 years back when I did my 100K rebuild on the car, Has worked well for the 18K miles I've driven so far.

__________________
'63 Catalina Safari, Silverleaf Green / Cameo Ivory, nice options, 4 speed
'66 Grand Prix, Marina Turquoise, 421 HO, many options, 4 speed

My Garage
Tarheel Tigers Pontiac Club of Raleigh, NC
  #3  
Old 05-11-2021, 08:32 AM
70ra455's Avatar
70ra455 70ra455 is offline
Ultimate Warrior
 
Join Date: Sep 2004
Location: Canton, Michigan
Posts: 2,147
Default

I was surprised as well. Yes, I'm running an 11" clutch.

__________________
1970 GTO Convertible 455 Ram Air M-21, Atoll/Blue/Black, Hood Tach, 3:31 12-Bolt Posi, A/C, Console

1966 Grand Prix 421 Tripower 4spd, Marina Turquoise/Turquoise, a/c, console, posi, reverb. pa, pb, ps, remote mirror, mats

2010 Dodge Challenger R/T Classic, 6spd Hemi, Detonator Yellow, black stripe, black leather
  #4  
Old 05-11-2021, 09:22 AM
mgarblik mgarblik is offline
Ultimate Warrior
 
Join Date: Mar 2005
Posts: 6,035
Default

The pics show a clutch set-up that was probably adequate and working fine until oil got on the disc. Whoever surfaced the flywheel produced a good finish and the wear-in pattern looks pretty good and even except where it was slipping due to the oil and loss of grip. Same for the pressure plate. You could probably go back with what you have there, fresh disc of course, and be fine. Most clutch and joint specialty shops can take a skim cut on the PP and Flywheel to get you a fresh surface. My town of 100,000 residents has 2 such shops. Now if you were unhappy with the feel, chatter, or pedal height and pressure before the oil got on the disc, then you may need something with a little more holding power.

  #5  
Old 05-11-2021, 02:02 PM
70ra455's Avatar
70ra455 70ra455 is offline
Ultimate Warrior
 
Join Date: Sep 2004
Location: Canton, Michigan
Posts: 2,147
Default

Just got a great deal on a new clutch kit and cutting the flywheel.

Hopefully all installed by this weekend ... with no more leaking oil!!

We'll see soon enough!

__________________
1970 GTO Convertible 455 Ram Air M-21, Atoll/Blue/Black, Hood Tach, 3:31 12-Bolt Posi, A/C, Console

1966 Grand Prix 421 Tripower 4spd, Marina Turquoise/Turquoise, a/c, console, posi, reverb. pa, pb, ps, remote mirror, mats

2010 Dodge Challenger R/T Classic, 6spd Hemi, Detonator Yellow, black stripe, black leather
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:46 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017