I'm using Craig's software to datalog for tuning. Do any of you use the 0-60 and 1/4 mile functions? I've been using the 0-60 as a performance meter for tuning changes. Am I correct in assuming that I could be producing worse than "real life" times because of wheel spin, but could not produce faster than real life times? I'm down to 4.8 and even saw a 4.7. The car definately feels that strong, but that would put it in pretty good company according to the magazines.

------------------
'87 Formula WS6 - ZZ4 Crate TPI, ported heads, LT4 hot cam, 1.6RR, Accel runners, Accel lower, ported plenum, Edelbrock 58mm TB, pulleys, SLP cold air, headers and full exhaust, gutted cat, Walbro 255, Koni yellows, aftermarket panhard & LCA's.

 

Actually, I too use the software, but you will actually see quicker than real results the more you spin the wheels. The VSS sees any wheel rotation as distance travelled.
My fairly stock GTA shows high 4 second 0-60 with wild wheelspin, but in reality, "G-Tech pro" runs mid 6 second 0-60 times.
If you launched with no wheelspin at all, it would be fairly close.
Generally though, the rest of the software package is very good, although, I have made changes to my copy to tailor specific screens for specific areas to monitor in an attempt to reduce clutter, especially on page 4.

Cheers

Richard

 

How does distance traveled affect 0-60? Isn't it the amount of time it takes until it sees 60? My experience has been that my 0-60 is worse with wheelspin, so I try to launch with the least as possible. I can see distance traveled in the 1/4 being affected by wheelspin, however, at the end of a 1/4 it shouldn't be a big factor considering how many revolutions the wheel has made.

------------------
'87 Formula WS6 - ZZ4 Crate TPI, ported heads, LT4 hot cam, 1.6RR, Accel runners, Accel lower, ported plenum, Edelbrock 58mm TB, pulleys, SLP cold air, SLP headers, !cat, Summit exhaust cutout, Walbro 255, Koni yellows, aftermarket panhard & LCA's.

 

Steve,
If you use the software only for 0-60 times, the software looks at speed which it takes from the VSS, against time.
If you were (and I dont recommend this) to jack up the back of the vehicle and run a 0-60 mph run, using the software only, it might even see as low as 2 seconds to 60.
The same is, with excess wheelspin, if the wheels spin up to 60 mph, VSS speed, but the vehicle is only travelling 20 mph, due to spinning the wheels, it will give a very short time to 60, although you are not travelling that fast.
Consider a car on ice, you can accelerate, the trans will shift, and the speedo will show 60 or even 100 mph, but you may not physically be moving because the wheels are spinning on ice.
You may show a quick 0-60 time, but if you were to go to the drags, and spin the tires, Craigs software will show a quick 0-60, but the guy next to you who doesnt spin will leave you in the dust.

Hope this makes sense.

Cheers

Richard

 

If your launching like your racing, you shouldn't be registering 60 mph and stopping the timer. I can see doing that if I'm doing a smokey burnout, but not at launch. The scenario that happens is...launch pedaling the car (wheelspin~20-30 mph), car hooks and your doing ~15 mph, then accelerate to 60 and the timer stops. Thats why I say your consuming time with wheelspin because the timer has started, but unless your doing a burnout, the timer is waiting for you to get to 60.

------------------
'87 Formula WS6 - ZZ4 Crate TPI, ported heads, LT4 hot cam, 1.6RR, Accel runners, Accel lower, ported plenum, Edelbrock 58mm TB, pulleys, SLP cold air, SLP headers, !cat, Summit exhaust cutout, Walbro 255, Koni yellows, aftermarket panhard & LCA's.

 

Actually, the more I think about it, if you light the tires up on launch enough to reach 60 mph, your times would surely be like 2 sec. I can't see anybody having traction problems so bad that it would take 4 sec. Afterall, a 2.5 sec. 60ft. at the track is crap, and your getting some traction by then. Maybe I'm wrong, but it seems that you could have a very, very fast time because of wheelspin, or a very slow time due to wheelspin.

------------------
'87 Formula WS6 - ZZ4 Crate TPI, ported heads, LT4 hot cam, 1.6RR, Accel runners, Accel lower, ported plenum, Edelbrock 58mm TB, pulleys, SLP cold air, SLP headers, !cat, Summit exhaust cutout, Walbro 255, Koni yellows, aftermarket panhard & LCA's.