I took my 2002 out tonight, and ran a couple of G-tech 0-60 tests on it. Temperature was 61 F. Humidity was very very high. It was really foggy, and the pavement was starting to get slick. As you can imagine, traction was an issue. I started out on a long straigh backroad, and did a couple of runs. The first was something awful like a 5.2, because the tires spun like mad. Then I ran a 5.0, followed by a couple of 4.9's. Then the reserve fuel light came on, so I went to the gas station and filled up, and decided to try a few more, because the better weight distribution might help. I got on the highway, and pulled over. That time I ran a 4.8. Traction was still an issue, and I was working on getting control over the wheel spin, without bogging. I did a couple more runs, but didn't beat 4.89. So then I went back to the backroad I had been on before, because the road surface was cleaner there. This time, I revved to about 2500, and let the clutch out to just before the point where it engages. I hadn't been doing this before, and it made it much easier for me to control wheelspin with the clutch. Buy the time the clutch was maybe halfway engaged, I started adding more throttle. This run had just a hint of wheel spin for the first 15 feet or so. 0-60 was 4.70. I called it a night with that one and went home so as to avoid getting reported to the police. Anyway, I think on a dryer night, I could do significantly better. Traction really was the limiting factor. I also had a full tank of gas, some stuff in the trunk, and I'm not a light guy. On a cool day, on good pavement, with nothing in the car, half a tank of gas, and a light, talented driver, I have no doubt that the factory 3.9 second time would be attainable. I just thought I'd share my results with you all to use for comparison. Oh...I also scored consistant 110 ft 60-0 stopping distances. Considering the pavement (damp, and with lots of patched cracks) I think thats very very impressive.

Scott

 

I managed a 4.13 a few months ago before I had the Heads done. I'll do more tests next week when I get my G-Tech back from my friend. It's a fun tool to toy around with, but nothing beats going to the track. :)


[Modified by levrac68, 8:17 AM 10/24/2001]

 

I've heard that the way GM got their 3.9 0-60 times and their 1/4 times was by feathering the clutch and throttle to minimize wheel spin. I'd bet this is the way to get it done, but you might want to consider joining the 'Clutch of the Month Club'. :)

 

You may be right. But at this summer's Carlisle show, Dave Hill told me that they got their best acceleration times by side-stepping the clutch pedal at the "proper" rpm. I expressed some skepticism but he affirmed that side-stepping is what they did.

I've tried it. Doesn't work for me.

Ranger

 

Thanks for posting the results. I haven't timed my 02 ZO6 yet but my 99 coupe with Halltech TRIC, Bassani exhaust, Powerloaded did a 4.8 best. Hoping my Z will cream that.

- Charley

 

FYI. Some computer simulation done earlier this year yielded the following:

Sub-4.0 0-60 mph on the drag strip equates to 60' time of 1.85 seconds or lower and 330' of 5.2 or lower.

Ranger

 

I got a 5.2 in my 01 with traction control on, just letting out the clutch, bogging and flooring it. Then tried in comp mode, and got a 4.8, popped the clutch out at 1500 rpm and floored it. Then tried starting out in second gear from a stop for fun and got 6.4. Not bad, still beats alot of rustangs starting out in second.

 

Oh, come on guys! My bone stock 2001 coupe managed a 4.6 with only 2500 miles on the clock! First time was around 500 miles with 89 octane in it - they were out of 92. Best was a 5.0. Next was at 1500 miles...got a 4.8. Next was at 2500...rattled off several sub 4.7 times with my best being a 4.61. I have more miles on the car now, plus a vortex, so it should be even faster. I haven't run one in a while cause the g-tech was venom lover's and I moved to N CA from S CA. By the way, he managed numerouos 4.3's in his and a best of 4.15 (or so he says...but the damn thing never ran better than a 12.8 in the 1/4...fishy if you ask me).

Some of you Z06 guys want me to give you a driving lesson? :p:

 

As was implied, road surface makes a big difference.. Do the SC's hook best on concrete or asphalt?

 

Heck My 66 smallblock will do a 4.56 0-60 on 225 street tires. Sure hope the new Z06 (currently be shipped) does better than that! Oh I can't wait for it to get here!

 

I tryed the clutch drop at proper rpm idea a few month's ago after reading that post. The best 60' it would yeald was 2.0's. It is a simpler way to go but just will not get 4.0 times. I do have a gtec never used it, I will read the manual and take it to the track on fri night. Any tips on it's use? Ric

 

Ric, set the G-Tech up directly undr the RV mirror.......has to be dead on center.
Also, make sure it is setting a 0.00...........MUST be absolutely level.........
Turn it on, and move switch to far left position........ACCEl, GFORCE will alternately flash.......PRESS ACCEL, and hold for a second.........then SWITCH the sitch to the center position.......
Press the switch, it will set it self to a FLASHING "GO", mode.......
You can roll forward or rearwards, and it will not start......but, as soon as you HIT the throttle it will start..............if you DO NOT let off the gas, once past 60mph, it will record 1/4 mile time automatically............time for each will flash, (as you have used it)......either 0-60, or 1/4 mile.............

 

So if used at the track it will do 1/4mi only? I am not going to get enough run's to let off for the 0-60. Guess it will sit on the table unused. Ric

 

It will only show either 0-60 or 1/4 mile time.It will not show both.I have used it at the track many many times.

 

No, it should also record the 0-60 times.

Oops...Gary corrected me. Count me as one of the misinformed. I've only ridden in friends' cars who have G-techs. I do not use one myself.

I'm not sold on the accuracy of the G-tech. I know I'll get flamed for saying that, but there is a reason true accelerometers are expensive. The G-tech is a decent tool, but far from optimum. If its not perfectly level, times get thrown way off. Trap speeds are consistently 3-5mph higher than reality.

Z06LS6, since we live pretty close, you're welcome to borrow my Vericom 2000. It puts the G-tech to shame.


[Modified by WA 2 FST, 5:41 PM 10/24/2001]

 

Not flaimin’ ya at all, but….
I must’ve run G-Tech ~20 times at the strip and it’s always ~.1 slower than the ET from the slip (most likely due to some car squat during hard acceleration). Trap speed is higher by 3-4MPH, because it is the actuall trap speed (drag strip averages last 60’ before & after the finish line)
Point is, it’s extremely accurate and consistent too! :yesnod:
Of course you have to make sure it’s level, but I don’t see what the problem with that…

 

Thank's Gary, I just looked the manual over, it will flash the 0-60,but only record 1/4 and mph if you don't lift. I don't know if it's possible to take my eye off the tach on the run to see it. I will give it a try. Ric

 

Wes, where do you get the Vericom.........I never heard of it??
The G-Tech, will do a LOT better......IF, the 3 prong rubber bumpers are firmly against the windshield...........
This will not be possible w/out adding length to them.
If it is very ridgid, it does amazingly well, for a $140.00 tool......
Especially, for guy's that don't have access to a track within a 100 miles or more.........
Wes, thanks for the offer....i saw another BLK/BLK Z today around Allen, and also, have seen a TR/Blk.......but no Silver yet........... :seeya

 

I've found the GTech to be consistent, but different from the track. read 4-5 mph higher than the trap speed on my time slip and 1 tenth of a second slower on the et. For the 0-60, my Z06 has yet to come even close to my 87 Turbo Buick's 3.85 sec run...

 

Vericom's web address:
http://www.dragfactor.com

Not a cheap accelerometer, but the best out there. If you guys are able to get times that are right in line with the strip from your G-Tech Pro, then go with it. More than anything, being consistent on the road you choose to test on as well as proper calibration procedure on the unit itself will make it as accurate as it can possibly be.

The Vericom has a lot more features which some may not feel are necessary, but its "cool" stuff nonetheless. I have an older VC 2000. They have a newer model out now.