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102447 Posts in 12090 Topics by 4668 Members
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16  Camaro Research Group Discussion / General Discussion / Re: 1969 z28 dz 302 compression results low? on: November 20, 2011, 02:12:53 PM
 Although it may seem unrelated, my z starts hard, runs very rough and spits and sputters for the first several minutes of warm up. Been thru several carbs and now have the  original back on after having it restored with slightly larger primary jets and squirters. After removing the intake we found the intake runners soaked with oil and found where the surfaces mate with the head weren't right (to tight at the bottom as compared with the top edge). Still sucking oil but better as my vacuum is up to a mere 7.5 ".
 Well it seems the manifold has been over worked so I just received another 472 in great shape to try. When I do this I will ck. the head angles to see if someone angle  milled them  like they used to
 Any way, thru the constant pondering we checked the cyl compression and I thought it to be low.
Bottom line... Low vacuum, sucking oil and starts very hard maybe because of oil on the plugs?
This car just finished a frame off resto. We changed the cam out and degreed thinking it was  the vac, issue
  Thanks Gary
17  Camaro Research Group Discussion / General Discussion / Re: 1969 z28 dz 302 compression results low? on: November 20, 2011, 08:39:46 AM
 I have seen that 190 psi figure too but it just seem s that a short stroker with a huge duration cam and lots of "bleed off" could develop such high Numbers. The only thing that is not stock are the pro magnum rockers. I guess I'll try some stock rockers next. Hasn't someone out there ever done a compression test on a 302?  Thanks, Gary
18  Camaro Research Group Discussion / General Discussion / Re: 1969 z28 dz 302 compression results low? on: November 18, 2011, 10:08:29 PM
 Oh yea, and the leak down test was good. Any one?
19  Camaro Research Group Discussion / General Discussion / 1969 z28 dz 302 compression results low? on: November 17, 2011, 10:33:17 AM
Ok guys, has anyone done a compression test on a dz302?  Mine average 125 to 130 after 3 turns of the motor and 150 to 155 after maxing out at 7 turns.  Is this in the ball park or a little low?  All plugs removed, throttle open, 11 to 1 pistons, comp 346 cam, rebuilt w new rings and broken in. Jerry, you there?  Thank you, Gary 
 
 
 
20  Camaro Research Group Discussion / Maintenance / Re: Compression test results... on: November 15, 2011, 08:05:57 PM
 Ok guys, has anyone done a compression test on a dz302?  Mine average 125 to 130 after 3 turns of the motor and 150 to 155 after maxing out at 7 turns.  Is this in the ball park or a little low?  All plugs removed, throttle open,11 to 1 pistons, comp 346 cam, rebuilt w new rings and broken in. Thank you, Gary
21  Camaro Research Group Discussion / General Discussion / Re: we need to stop the fraud on ebay - on: August 31, 2011, 09:33:36 AM
 Someone got me for 2500.00 down payment a few years back on a 69 z28. (overseas)  Angry
22  Camaro Research Group Discussion / General Discussion / Re: 69 Z28 on eBay for the 10th time...Is it the real deal?? on: April 01, 2011, 09:55:03 AM
Very nice looking car. If it is a real Z and you wanted to make it "correct" so that it could attain its' true value, you would be spending a lot of money. Even the strips are wrong!
23  Camaro Research Group Discussion / Originality / Re: 69 defogger grill on: March 24, 2011, 04:21:19 PM
 I guess I will just have to find the correct grill! It looks as though the motor assembly is the same. Thanks, Gary
24  Camaro Research Group Discussion / Originality / 69 defogger grill on: March 23, 2011, 10:12:55 AM
 I have seen JohnZ's pic. of his rectangle defogger grill but mine is shaped differently where as one of the 4 corners is more arched. If it is not correct then what is it supposed to fit?  Thank you! Gary
25  Camaro Research Group Discussion / General Discussion / Re: 69 DZ302 Casting 3956618 Stamped V0219DZ VIN 19L52XXXX on: November 17, 2010, 11:01:31 AM
 Looks to me the partial vin should be in the 59xxxx area not 52xxxx ? Gary
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