Classic Engine Tech 1967 - 1981 Engine Related

Dyno of 67-69 Z/28

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Old Jan 21, 2004 | 01:52 PM
  #1  
FiefSS's Avatar
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From: Chicago Burbs
Dyno of 67-69 Z/28

I was just wondering since I still have yet to find one... If anyone has ever seen or has a link or some knowledege of what a stock 67-69 302 would put out at the crank or at the wheels. Hp and Tq if anyone even knows anymore. I get such a wide range of answers, and the only dyno runs I have seen were from the Trans Am engines and they were in the upwards of 425-470hp 350ft/lbs of torque...

If anyone knows what a street one made, or has any idea where to find that it would be so nice to share When my cars back together im getting it dyno'd but I would like to know what it was when stock.
Old Jan 21, 2004 | 04:15 PM
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From: BURLESON, TEXAS
Mine made around 269 rwhp.........but I have a 350 ci. Solid flat tappet. THat .490 lift cam I have is a mean one....LOL.


On the flip side.......I run 8.33 in the eigth mile. Not bad considering the 1969 suspension.
Old Jan 23, 2004 | 07:12 PM
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My bone stock original DZ302 69 Z/28 with 45,000 original miles put 277 rwhp on a chassis dynometer. I've heard of them putting even greater numbers but this car sat for 18 years.
Old Jan 23, 2004 | 08:38 PM
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thx, finnaly someone 277 is a really good number for stock Im hoping at least 350hp on mine. Any idea how much torque it made?
Old Jan 23, 2004 | 10:31 PM
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I don't have torque numbers off hand. I'll dig up my dyno sheets and see when I get home tomarrow.
Old Jan 23, 2004 | 10:40 PM
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cool, thx dude
Old Jan 24, 2004 | 11:36 PM
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From September 87 Muscle Car Review build of a DZ 302 to stock specs (.030" over bore):

With a 3927140 off road cam: 347 hp @ 6750, 306 tq @ 5250.

With a 3849346 stock replacement cam: 327 hp @ 6750, 305 tq @ 5000.

At 3500 the bigger cam made 180 hp, 270 tq; the stock cam made 186 hp, 279 tq.

That's why I only do 400's now.
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