<VV> Latest 0-60 times - G-tech Pro

[Bruce Schug]

Several years ago when I first got my G-Tech Pro, I ran some 
acceleration times. if you're not familiar with my car, here is a brief 
description:

'67 Monza coupe, 140, 4-speed, air-conditioning, Isky 280 cam, step 
milled out of the heads with 9.0:1 compression, MSD 6AL with 6,600 rpm 
chip, stock exhaust and Rochesters, 16 x 8" IROC wheels with 225/50-16 
rear tires (24.7" diameter); weight with 1/2 tank of gas, 2,760.

At the time my clutch needed replacement and I got some slip during 
hard acceleration runs. This may have been a good thing as the car came 
out pretty well, no wheel spin, just a little clutch slip and it was 
off.

After getting used to the G-Tech Pro I ran a best of 0-60: 7.48 sec. 
(with a passenger), 1/4 mile: 15.92 sec., 88.9 mph.

I actually ran a 15.97 @ 90.3, but later realized the road where I ran 
that had a slight drop to it so I discounted that run as not being 
accurate. It's almost impossible to find a flat, straight road around 
here that you can run a quarter mile run on! Testing has shown the 
G-Tech to be pretty accurate in measuring time, and a little optimistic 
measuring mph, as compared to a drag strip.

I always wondered what the car would run with my little 225/45-13 
autocross tires (20.8" diameter). It runs like a rocket at an autocross 
with these tires which change the gearing quite a bit. Yesterday I 
changed the tires and generally set the car up as I autocross it. It's 
weight is probably closer to 2,700 pounds like this. Early this 
morning, while it was reasonably "cool" - about 75 degrees - and before 
there got to be too much traffic, I set out to see if I could run 0-60 
in the sixes.

Because of the distance it takes to run a quarter mile, plus the speeds 
involved, I didn't run quarter mile times, just 0-60. I put 25 pounds 
of air in the rear tires to get some traction. On the first run I 
realized I had more than I needed. I made three runs at increasingly 
high initial starting rpm's, finally revving to 4,500 and letting the 
clutch out pretty quickly. Still, the car only chirped the tire(s). It 
didn't bog too badly, but didn't come out real well. Part of that has 
to do with the lightweight clutch assembly which revs quickly once you 
get going but has no mass to help start off. To really get out quickly 
I'd have to try higher rpms which I wasn't willing to do. The 6,600 rpm 
chip in the MSD came up pretty quickly in first and second gears.

I got two good 0-60 runs: 7.70 and 7.69.

I was obviously disappointed. On the way back home, with nary a police 
car in sight, I thought about why the car wasn't faster. Part of it was 
the slow launch. I probably should have put about 35 pounds of air in 
the rear tires. The second thing was the fact that I had to make two 
shifts, getting into third gear with the small tires before hitting 
sixty, whereas the larger tires would do it in second.

I did get to smell the Source, Street Kevlar clutch disc for the first 
time, and was happy that the two-spider differential was fine.

If I had the opportunity to play on a good stretch of deserted asphalt, 
I think I'd just concentrate on the start until I could get out better, 
then see what she'd do. But for now, I can still claim that it went 
7.48 in full street trim at 2,760 pounds.

Bruce

Bruce W. Schug
CORSA South Carolina
Greenville, SC
bwschug at charter.net

CORSA member since 1981

'67 Monza. "67AC140"