Stock 1/4 Mile performance of ZL-1 or COPO

[J Rod]

Howdy,

I came to this fourm in search of a little help. There have been numerous threads posted recently regarding Supercar performance as of late on corvetteforum.com, z06vette.com, and suprafoum.com. The big argument has been over two things.

1 - With the change from Gross to Net HP ratings there are some who claim that a ZL-1 on made about 360RWHP and that any other numbers are grossly inflated.

2 - That no COPO Camaro or ZL-1 equipped vehicle in an "as delivered state" will run 10's in the 1/4 mile. Now let me qualify this by stating that everyone understands we are not talking about running on F70 polyglass tires. But lets say on a 9" slick. It is also my understanding that headers for these cars were delivered in the trunk, so I lets say with open headers and on slicks.

The only magazine article anyone could produce was on a car that had been balanced and blueprinted and was modified.

Since this seems to be the center of the supercar universe I figured if anyone had either done this in one of their cars, or had links to proof that we could put alot of the speculation to rest.

Thanks in advance for your responses...

[Stefano]

J Rod,
Is 11.04s close enough (eight inch slicks were used as well as open headers).

This was the 'Drag Times' Yenko article and thus used the lower performance L72,not ZL1.

[JoeC]

Dick Harrell tested a 1969 ZL1 Camaro with 4:10 gear and TH400 trans in Super Stock magazine May 1969. The car had open headers, rear spring clamps, and 6 1/2 inch slicks. The remainder of the car was stock. It ran a best of 11.64 @122.15. Harrell commented that the tires were completely inadequate.

[Chevy454]

Stefano:

I don't have our copy in front of me, so don't kill me if I'm worng, but I was thinking the Yenko L-72 ran an 11.94? Still, pretty quick for such few mods.

Harrell did test a "stock" ZL-1 somewhere...I will have to dig it up.

What a lot of people don't realize though, is that the slicks back then and the slicks today are light years apart. B-I-G difference.

[Charley Lillard]

My ZL1 was Tested when new and ran a 13.16 @110

[COPO PETE]

Sorry Charlie, but that reminds me of a VW commercial.....Drivers Wanted! Actually that is a prettty decent time!
Peter


[Edited by COPO PETE (05-10-2002 at 07:29 PM).]