Yenko demonstrator Camaro

[randy27]

Interesting articles back then. Thanks for sharing

[EZ Nova]

So reading through that stuff, it seems with headers and 8" slick, the camaro with 4.56's ran 11.94? That's pretty impressive back then. I'm comparing that to a buddy's '69 L78 4sp Nova. He had headers, jetted carb, recurved dist, slick but not sure what gear. Car would run 11.70's in that trim.

Now a Nova was 300 lbs less then a camaro, so could a stock-ish Yenko Nova back then run 11.40's???? With todays tech and tweaks, they should be pretty close to a 10 stock-ish car?

[Copo_Cartel]

Originally Posted by PeteLeathersac

'

Yep, triple Copo if a 9560 or 9561 car w/ 9737 and 9511 Rear.
Heard some exist/love to see real paperwork of one if anyone has.

~ Pete

.

I am aware of approximately five Copo Camaros with real 4.56 gears as sold from the dealership. The 2 that come to mind with documentation is the white car blue gut that raced and sold new out of Georgia . The second car is a green green car that sold new at Jack Maxton Chevrolet.

[William]

From the registry

N688295 Burgundy blk std
N693864 Burnished Brown/wht std

[PeteLeathersac]

'

Great info and thanks for the updates!
Expecting those mentioned are 9561 cars, are any w/ 9511 and 4:56 factory gears or dealer added?
Are any 9561's w/ 9511 also 9737 cars hence the true Triple Copo?
Also, are any 9561 cars known w/ 9511 equipped w/ 4:88 gears?
Lastly, were any 9560 cars known built w/ factory 9511?


~ Pete

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[William]

Here's an RS triple COPO. Too bad it didn't have 9511!

From Courtesy Chev, Sebring OH. Several of their ducted hood cars had the stripe.

[x33rs]

I'm not surprised at the times. Mike, a good friend of mine bought his COPO in 73. 20k original miles. The engine internally is a bone stocker, never bored or rebuilt. Mike bought the car with some day 2 mods and has kept it that way ever since. It does have 2" hooker headers on it and had 5.13 gears in it when Mike bought it (came with the original 4.10's in the trunk) and some slapper bars with cragars. Otherwise it's a very nice original car.

Around 1985 or so Mike decided to take it to the track for the first time. Bolted on 28x9 slicks and opened the headers. It ran 12.20 at 114 mph and was out of gear at the 1,000 ft mark, but he stayed in it. Too much gear for that stock engine combo, but it ran pretty darn good anyway. Boy that thing would scream!!

Sometime in the late 90's he decided to install 4.56's. He still drives the car around today but it leads a more cushy life now. He has no interest in going back to the track anymore. Pretty sure the 4.56's would have worked better at the track in his car but we'll never know.