Topics

1

Maintenance / 1969 Rear Spring Rates?

« on: January 20, 2010, 03:09:18 PM »

I may have this all wrong- but in looking at spring rates (rear) the Z28 shows a rate of 103, while other base models have up to 126 Lbs, while the 427 CI option shows a 4 leaf 126 Lb spring. I used the MOOG 6308 in my Z28 as a replacement, and additionally Mr. Pozzi recommends 125-150 rear rates- so why did GM choose to use such a "light" spring on the "HD" model(s), which would seem to make the car prone to oversteer?

2

Maintenance / Holley 4053 DZ Carb accelerator pump diaphram

« on: January 14, 2010, 04:13:42 AM »

I need to replace the accelerator diaphram on my Carb DZ 4150/ 4053.

Summit shows two- a 30 cc and 50 cc- anyone know which is correct OEM Spec?

Thanks!

3

General Discussion / 302- Finally!

« on: September 25, 2007, 03:56:24 AM »

I purchased my 1969 Z28 back in 1984, and promptly put it into storage- for a long time after driving it once ( the motor was basically dead, Etc). Finally, after a career ending injury ( paid firefighter), marriage, a couple of moves and some other "stuff", I got the thing running and was actually able to drive the car again yesterday. Only 23 years, right!!! 11:1 302, Mech cam, 2.20 Muncie with 4.10:1 rear- what a wait it has been after all the posts here and there...anyway, I want to thank Jerry MacNeish for the excellent work on my DZ Holley, and for rebuilding and recurving my distributor. Its not all about parts looking good- which they do- but also the performance potential of having these important parts blueprinted and optimized for the 302. I am running pump premium, no additives- no problem.  Jerry, JohnZ, PDQ and many others offer great advice Ref setting these cars up. For now, until I get some more shake down runs done and get it licensed again, I am impressed with the little 302- and I feel pretty confident I will be happy with its ultimate performance. Thanks again to those who take the time to help others realize their dreams by posting here ( and there), offering essential services, and a friendly chat as needed. If your building a 302, follow the posts from these guys and you should be smiling too. 

4

Restoration / metallic factory paint

« on: September 18, 2007, 06:04:11 PM »

When the cars were painted at the factory- were the metallic paints like Silver or Gold clear coated as part of the process? I am not under the impression that this was done, but have a friend who believes it was- no problem just want to pin down the actual process for metallics in 1969.

Thanks!

5

Originality / 12 bolt brake line

« on: March 19, 2007, 03:41:10 AM »

Could someone be so kind as to snap a photo of the bracket which holds the flex brake line to the rear end lines, and bolts to the rear end ( 1969 12 bolt)- and post it here? I am not sure of the configuration, as mine has been apart for over 20 years!

Thanks-

Rob

6

General Discussion / 302 replacement piston options

« on: February 17, 2007, 06:28:44 AM »

As I move forward on my project, I have narrowed down the options for 302 pistons to those made by Wiseco ( Pro Tru forged), the TRW L2210 forged option, and the hypereutectic pistons offered by Rick's First Gen. I am a little intrigued by these, as I understand the hyperutectic design can offer some advantages, and the salesperson said that Jerry M. recommends them. I would love to have opinions/ personal experience, particularly from Jerry MacNeish. BTW, the car will run stock manifold, headers, and stock carb rebuilt and Dist recurved for 302/ pump gas by JM.

Thanks