Z-28 1/4 Mile Times

[rsatz28]

Just curious. Has any one run their Z at the strip? I don't remember what mine ran last Sept at the Grove.

Last year I was running headers( 2 1/2" Flowmaster system), stock ignition except for a Pertronics points replacement kit. Ran on stock BFG Radial T/A's. 3500 RPM launch / 6500 RPM shift points

I will post my times/mph tonight.

[rsatz28]

Fastest ET [email protected]
Fastest MPH [email protected]

Made a total of 9 runs with my those two runs being the last of the day, in the above order.

[Chevy454]

It's GREAT to see you stretching the legs on that thing!

And while I don't have a Z28, in one of our old mags (Hot Rod or SS&DI?) they had a project Z28 that they built over time...early in the build they played with it in the stock configuration and whittled the ET down to mid-13s...it was a '68 Z I believe, they put some gear in it, and played with the timing/jetting, but left the exhaust manifolds and such on the car. It's a good read...

[Dave Rifkin]

I think I recall an old copy of Super Chevy where they messed with a '69 Z and got it into the 12's.

[rsatz28]

It may be the same article and I think they were close to breaking into the 11's. I'll have to look for that article.

[68TopStock]

I think my best time so far with "Little Hoss" is 13.01, which was last years first run at SYC?

This year at Kansas City, my best was 13.051 @ 106.60. So far my best 60' is 1.749, during my last run at Kansas. The temps where in the high 80's/low 90's, so I hope to go into the 12's soon, on a cooler day.

These times are with a stock motor, std/std (bore/comp), but of course help from the crossram, headers and slicks.

The second owner of my car used to run 11.50's with the crossram setup, but with an automatic. He won Bristol in '71 with that set-up, Stock Eliminator.

[rsatz28]

[ QUOTE ]
Fastest ET [email protected]
Fastest MPH [email protected]


Can some one explain why I have a higher speed on my slower run in this example?

[SamLBInj]

Either you let off the gas at the end or you had a slow reaction time but quicker run..

[SamLBInj]

I had a 78 Z28 back in high school, with L60-15's,Lakewood Traction Bars, Mr gasket air cleaner,Air shocks, Open headers, tarantula manifold and holly 780 carb I was running mid to low 14's and thats with the stock cam, heads, and clutch....Hard to belive this basically stock 175hp car with a few bolt ons was faster then the 302's....sometimes you just get a good motor. Eventually that stock cam expolded on a 5500 rpm shift into 5 pieces...

[Chevy454]

[ QUOTE ]
Can some one explain why I have a higher speed on my slower run in this example?

[/ QUOTE ]
Why? Physics...look at your time slip...I'm gonna guess you were slower to the 60' mark on the higher MPH run? A slower ET means *more* time to accellerate, thus a faster MPH...I've got a formula around here somewhere that shows the why/how, but I'm headed out the door. Anyway, it's not *always* the case, but holds true the majority of the time...it's usually more profound in faster cars...