Yeah I really can't comment because in the 60's my parents were in elementary/middle school.

But if you assume those numbers are SAE gross then that 4 barrel was making ~350HP net. I personally assume that the numbers of the factory 302 were probably not all that off, but that it was perhaps a bit corked up. Even small mods are mods, so if you touched anything it wasn't stock anymore and so a lot of the anecdotes might have to be disregarded.

 

Well I certainly can't tell you what they were doing as I was in my late teens back then. What I can tell you is that the book was published in 1991, the documents I pulled the HP numbers from were part of an Inter-Organization Letter (I assume that is an inter-office memo) signed by G.D.Thompson-Engineering Lab and J.R. Landis-Engine Developement Department Head and went to 14 different people, one of which was V.W. (Vince) Piggins who was behind many GM high performance projects. It lists a Z/28 four bolt case engine 19632-10A, service grind cam 0-304871 (.527"/.492" lift), Dynamometer headers 30" pipes to 3-1/2" collectors, cylinder heads 1.60"-2.02" valve sizes .050 milled. So, either the letter/results in the book were fabricated, or Chevy was blatantly lying in their test data/memos, or I completely fabricated all of the above, take your pick as you have stated that it is not possible. I did not attribute any HP numbers to the DZ 302 engine, I merely shared some data I found, take it for what it is worth (obviously you think it is worth nothing).
Clyde

 

I also own the same book and have others where it is referenced that in "race trim" they were getting just over 500hp, so in bone stock trim, those numbers appear realistic. Anyway you slice it, its still way more than the B.S. 290hp GM reported for insurance purposes.

 

302 DZ motor: (Purpose built)
4 bolt main(4"bore 3" stroke)
forged steel crank(large journal tuffrided)
"pink" rods (shot peened, full floating pins w/3/8 bolts)
forged 11:1 domed pistons with floating pins
186 heads with 2.02/1.60 valves("fuelies")
screw-in studs, heat-treated rocker arms
mechanical solid "30-30" (for Valve lash .030"/.030"),
452*/455*...485"/.485"lift
GM high-rise aluminum intake
780CFM vacuum-secondary Holley 4053 carb.
***Header came in the trunk, extended rpm to 8500!***
(Rumoured the 290hp rating was "NET" so as not to lie, running all accessories etc...for insurance purposes.)

396/375:
4 bolt main
forged steel crank
GM high rise intake,
Forged 11:1 domed pistons, full floating pins
mechanical solid 316*/302* dur...520"/.520"lift
291 heads with 2.19"/1.88" valves
780cfm carb vacuum secondary 4150 carb.

 

Screw you guys all its teh IROC that rocks lol.

Sorry had to.


But I happen to agree with some people in here, The SS could be anything, The Z28 is strictly Camaro.

Out of all my Camaros I have owned, None of them ever has had a SS on them.
RS, Z28, Type LT, Iroc, RS/Z28 But No SS.

(currently own)
71 RS/Z28
87 Iroc
89 RS
95 Z28 (Zhawk)

 

They do though! Made a big impact for a 6 model year car.

 

Only Camaro's could be Z/28's, and only Z/28's could be IROC's...
IROC-Z's...

 

SS
Because I don't want to change my plate, or e-mail address.

 

That would be contrary to the history of the Camaro as well as every other car GM has labeled with SS. SS is always the top of the line. I can't see them changing that, regardless of the wishful thinking of the Z28 badge fans.

 

No it's not.

 

http://www.chirpthird.com/vb/showthr...734#post128734
Fbodfather quote:

 

need to be registered, so I see nothing.

 

Well according to Scott the Camaro is 90% done. So I wonder do they a mule out there with the production lights and interior.

 

Scott, got any comment? How about a date when we can know some REAL info?

 

I can't read anything else either. We known for a long time the "top dog" won't be out at the start of production and neither will the ragtops, so far this thread is useless