I know the Z28's had a 302 but are the HP ratings higher than the 396? If not, did the Z28 out perform the SS396 in any other paramters? TIA!

The 302 was rated by GM at 290 hp and the 396 came in 325,350 and 375 hp in '69.

Key word is "rated." I think with minor tweaking, the actual HP for the 302 was closer to 400. Also, the L-78 375hp 396 was under-rated, but I don't know by how much...I'd guess 50hp. Basically the same motor in the Corvette was rated at 425hp, although I think the Vette had better flowing exhaust.

I know the Z28's had a 302 but are the HP ratings higher than the 396? If not, did the Z28 out perform the SS396 in any other paramters? TIA!


Lets see..

69 L-78 X 69 Z/28 = 69 Z/28 in the L-78's rear view mirror. ;):D

Lets see..

69 L-78 X 69 Z/28 = 69 Z/28 in the L-78's rear view mirror. ;):D



:eek::eek::eek::eek:

Blasphemy!!!!!

alan

Performance:
(Z-28) 302/290bhp: 0-60 in 7.4 sec, 1/4 mile in 15.12 sec @ 94.8mph.
(SS396) 396/375bhp: 0-60 in 6.8 sec, 1/4 mile in 14.7 sec @ 98.7mph.
(COPO 9561) 427/425bhp: 0-60 in 5.4 sec, 1/4 mile in 13.5 sec @ 102mph.
(COPO 9560) 427/430bhp: 0-60 in 5.3 sec, 1/4 mile in 13.16 sec @ 110 mph.

Nikke

:eek::eek::eek::eek:

Blasphemy!!!!!

alan

But so TRUE !

I have read in some magazine that z28 turned a 14.50 and a 68 Nova with 396-375 hp turned 13.87. I do agree with the COPO numbers. Again those times depend on many variables at the time of testing. But I would say the big block is faster.

I guess at the end of the day there simply is no substitution for cubic inches.

alan

There is no replacement for displacement!

I guess at the end of the day there simply is no substitution for cubic inches.

alan
:yes: And porcupine heads!

You guys have left out the fact that these cars can and were ordered with factory race parts.
My L78 turned into a L79 in .0000001 seconds after I took delivery. Those heavy heads had to go. Why didn't I order a L79? Us kids had no idea they were an RPO! Good thing my parts-man/racer buddy had a set ready to trade for my iron heads. Those heads are still running around town.

Hey, we're talking performance! OK, brand new, 1800 miles, Mickey Thompson Super Scavenger Headers (from the same parts-buddy) But not the aluminum heads yet, (Hey, I had to make some money first) ;), on original Tiger Paws, same rear gears as today (4:10's), and the original low stall converter on my TH400, (still have it), engine crapping out at 2000rpm because of 100 octane leaded gas, so much wheel hop that the battery fell out of it's tray, no ducted hood yet, best I recall that day was 14.4 @100????? something. Hey, it was nearly 40 years ago and I had my mind on women!
The next weekend I changed the plugs and installed 'traction bars' (yeah, right:() 13.44 @ 108.88. The same basic setup today is good for 11.89 @ 114 ish. Got lotsa ideas. ET's should be at least a half second lower. (never met a muscle car owner who doesn't say that.):D

My dad rode in all of these cars new and tells me stories of all of the cool cars he's rode in/drove in the day. A good friend of his bought a lemans blue 1969 Z in 1970 that had the factory headers. He said they would make many high speed trips in it on I-85 and he said that it had no problems hanging with a 375 hp 396 Camaro and would walk away from it up top. Gotta love a high rpm 302 :D

"My L78 turned into a L79 in .0000001 seconds after I took delivery. Those heavy heads had to go. Why didn't I order a L79? "

Hey Fred, didn't you mean to say "L89"? L89 was the aluminum head motor - L79 was a 350 CI offered in the vette's, I think.

"My L78 turned into a L79 in .0000001 seconds after I took delivery. Those heavy heads had to go. Why didn't I order a L79? "

Hey Fred, didn't you mean to say "L89"? L89 was the aluminum head motor - L79 was a 350 CI offered in the vette's, I think.

L79 was a 350, 365, or 375 HP 327 depending on what vehicle it came in and the year. I bet he probably meant L89 too. BBC iron heads are very heavy, lol.

I would take the 396 for 1/4 mile & streight in line racing and the 302 for a rally road course.

Charlie 69 Camaro RS
70 Challenger

I bought the 302 (+0.030") engine from a '67 Z28 drag car (running F stock) in 1971. That engine pushed the '67 Camaro in stock form right at the national record of 11.6 in the quarter.. coming off the line at 10,200 rpm, and shifting at 9,600 rpms....
I don't recall the gearing, but probably was 4.56...

A friend of mine ( I worked some on his car) bought a new '69 Z28 and immediately converted it for SCCA road racing.. He ran it for years on all the big tracks, including the 12 hrs at Sebring, 24 hrs of Daytona. He told me he would be running close to 190 on the highbanked part of daytona.

How long do you think the 396 engine would last at those tasks? :)
(He did run 427 ci engines later in a '73 body in IMSA GT).

I don't remember what I meant. But it had something to do with silver colored heads on a BBC.:p

Just to follow up with what a couple of other posters mentioned. Chevrolet built the L78 Camaro SS and the Z/28 Camaro for 2 entirely different purposes. The SS was meant for drag racing. The Z/28 was meant for road racing. We all know individuals did drag race Z/28's and were quite successful. I would guess in a quarter mile competition more often than not the SS would leave the Z/28 behind. Put both of them on a road racing course though and the Z/28 would leave the SS even further behind. It's like the old apples vs. oranges analogy. You cannot really compare them as they were designed and built by the factory for 2 entirely different purposes. Anyway I love them both.

Vince, maybe you just hit on the reason the ZL1 was invented.

L79 was a 350, 365, or 375 HP 327 depending on what vehicle it came in and the year. I bet he probably meant L89 too. BBC iron heads are very heavy, lol.
Yep L89. ;)
Heavy!? Your front end is "heavy" when you buy a car brand new and take it to a shop for alignment. (my dealer refused to align it. Jerks) Then the technician looks at it and says he can't work on it because the springs are FLAT!:( Same springs as today, but now the car sits too high in front.
http://epitomesrebuild.com/images/248.JPG