CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
April 18, 2014, 06:07:52 AM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
97148 Posts in 11687 Topics by 4578 Members
Latest Member: ronhill
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  General Discussion
| | |-+  Clutch recommendations for 1969 Z/28
« previous next »
Pages: [1] Print
Author Topic: Clutch recommendations for 1969 Z/28  (Read 2798 times)
sdkar
Hero Member
*****
Posts: 620



View Profile Email
« on: February 21, 2008, 06:11:24 PM »

Hey guys,

Looking to install a new clutch, pressure plate and bearing in a 69 Z/28.  Still has the original motor and tranny.  I want to get something that is a little tougher than OEM and will give me great performance but will not increase the pedal pressure or shifting east.  This car is not drag raced and sees only some slight mild street duty.  What do you guys recommend?  Also, Do I have to stay with a 10.4" clutch or can I go to an 11" with no problems?

Thanks.
Logged
Farm Boy
Member
***
Posts: 31



View Profile Email
« Reply #1 on: February 21, 2008, 07:04:55 PM »

I would get a brand name diaphragm clutch like Zoom, Hayes, or Centerforce.

If your clutch kit comes with a pilot bushing, do yourself a favor and check it with a magnet before you install it. If a magnet sticks to it don’t use it. Most of the pilot bushings in these kits as well as most of them for sale in the auto parts stores are made in China and adulterated with 40% iron. These cheap Chinese bushings don’t have the self lubricating properties of a 100% bronze oilite bushing. Worse yet many of them don’t even fit! When you pound one of these oversize bushings into your crankshaft you will either shave metal from the OD of the bushing or squeeze the ID of the bushing making a tight fit on the transmission input shaft. Often times the result is a spun pilot bushing after just a few thousand miles.

Napa stores carry a 100% bronze heavy duty pilot bushing. The part number is BK 6151161. Unlike the cheap pilot bushings the 100% bronze bushing is easy to install, won’t gall your transmission input shaft, and will last longer than the clutch. For only $3.29 it is good insurance. http://www.napaonline.com/MasterPages/NOLMaster.aspx?PageId=470&LineCode=BK&PartNumber=6151161&Description=Clutch+Pilot+Bushing

Napa also carries Chinese junk iron pilot bushing BK 6151014 for $1.69. Don’t buy this one.

If you want to install an 11 inch clutch in your Z28 you will need the following parts:

•   An 11 inch passenger car bellhousing (GM 3899621, 3872444 or 464697)
•   Bellhousing dust cover
•   168 tooth flywheel
•   Iron nosed, staggered bolt starter
•   Starter bolts
•   Starter brace
Logged

Steve
Jerry@CHP
CRG Member
*****
Posts: 1443



View Profile Email
« Reply #2 on: February 21, 2008, 09:10:57 PM »

There is a real nice HD Hays that we use at CHP.  More money (about $425 w/ t/o bearing) but good dependable unit at the drag strip and on the street.  Very similar to the GM 10.4" L88. 

We've been putting the Borg Warner Power Brute in the stock cars (about $150 for the kit) and that works well for them.  The Hays is a step up. 

Jerry

Logged
Jerry@CHP
CRG Member
*****
Posts: 1443



View Profile Email
« Reply #3 on: February 22, 2008, 08:59:34 AM »

I should also point out that bigger is not always better.  Stay away from the large diameter clutches.  Chevy's ultimate clutch was the L88 and that was 10.4".  All of the NHRA Stock eliminator race cars use a small clutch.  The one I run in Old Reliable is eight inches in diameter.  Bigger is heavier and that takes horsepower to turn it.  NHRA Pro Stock cars run a 6" dual disc clutch.  10.4" is good for just about any street performance car.

Just some food for thought.

Jerry 
Logged
L78 steve
Member
***
Posts: 357



View Profile Email
« Reply #4 on: February 26, 2008, 08:21:36 AM »

Years ago I owned a torque y El Camino ,I was replacing clutches once a year.I even tried the HD Corvette clutch with no improvment.When I upgraded to the 11" that solved the problem.
Logged

69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
firstgenaddict
Hero Member
*****
Posts: 1091



View Profile WWW
« Reply #5 on: February 27, 2008, 01:48:52 PM »

I went with a Centerforce dual friction 10.4" and couldn't ask for a better pedal feel or grip... it works excellent and came highly recommended from many other 302 Z28  owners.
Logged

James
Collectin' Camaro's since "Only Rednecks drove them"
 
Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://picasaweb.google.com/112392262205377424364/1969_Z28_Restoration
Pages: [1] Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.084 seconds with 18 queries.