What do you guys think is more accurate, a g-tech or craig moates's "g-tech"? Tomorrow I will make a run with both running to compare but what do you guys think?

 

Run both, then go to the track and see which is closer to the 'real' time.. then you can tell us too..................

 

Hell, I'll have all 3 timers going, but I want to get my CAI put on before I go back to the track, week or so. Anyone have personal experiece?

 

Track time ET should be very close to the same but track MPH will be slower. The MPH on a time slip is a calculated number. The finish line MPH is calculated from the time it takes to go the last 66 feet of the 1/4 mile.

If you take the MPH from the timeslip and multiply that by 1.0072, it should be very close to the g-tech 1/4 mile MPH. That's the factored MPH that the car should be crossing the finish line at since it's still accellerating during that last 66 feet.

 

I got some numbers. Gtech and moates going at the same time. I let off a bit after the 0-60 test and just held a steady speed until the end, night and many cars around(not too many if I could stop in the middle of the road and launch).
moates
60ft 1.89
0-60 5.75
1/8 9.08
1/8mph 75.17
1/4 14.82
1/4mph 64.22
1/4rpm 1775

gtech
0-60 6.10
1/4 14.82
1/4mph 72.8

Exact same 1/4 time. I was hookin also, my best gtech 0-60 since my flowmast catback w/ cutout closed.

 

Steven, is that 1.0072 mult factor correct? I ran 114.2 MPH on a G-Tech but would expect a 109-110 MPH at the track, although I have not made it to the track yet.

 

It's about as correct as the 1000 foot ET multiplied by 1.19 to calculate a 1/4 mile ET or 1/8 mile ET multiplied by 1.56 to figure out 1/4 mile.

Since there are variables affecting the car no formula is 100% accurate. That number was given to me by hardcore drag racers with sub 9 second vehicles. They say over the years of collecting data from their data recorders, that's the closest number they can come up with.

I have no access to a G-tech to test the theory. The actual speed at the 1/4 mile doesn't affect me anyway. It's only that number on the timeslip that I can use.

Your math is wrong somewhere. If G-tech says you did 114.2 then a timeslip will say around 113.4

 

I wasn't using a formula to estimate my track MPH, just what a friend has told me about his differences between G-Tech and Track MPH, which is around 5 MPH for him, running 13.5's @ 102 at the track and 13.5's @ 106-107 on the G-Tech. That's why I was curious about the 1.0072 factor. I hope to find out for myself next week, I NEED to get to the track.

 

The g-tech accounts for tire spin. The moates does not. I would assume that the faster your car is, the less accurate the moates becomes. And BTW, that 1.0072 factor is crap.

Plant, tell us about your car. Sounds fast to run 14.8 @ 64mph.

 

I talked with Craig and he also said wheel spin will introduce error. I also tried a run that I blatently(sp?) spun the hell outta my tires and still got a 1.9 60ft so I don't think that reading is accurate at all. I went to the track with a bone stock L98, my 2800stall, and headers with open ypipe and ran a 14.53@96 with a 2.18 60ft time...not taking advantage of the stall. My posted times are with full 3in exhaust and Firestone ss20s which hook decently even on the street. That 14.82 run seemed a bit fast to me also but I went with it because both timers got it. I hope to have a track compare soon.

 

The moates software is a good tool to detect tire spin..

Something a 14 second car would notice, but sometimes we don't .. (unless of course it's obviously bad)..

-- Joe

 

no traction in 3 gears? is that neutral, first and reverse?

 

How do these units work? Do you have to install them on the car or does it just detect forward motion or what?

 

Thats first, second and third, with 26" slicks.. I run a manual tranny.

I'll run 11's if I ever make it up there _BEFORE_ someone drops oil and antifreeze all over the track..

-- Joe

 

I have no clue what the moates is, but the G-Tech plugs into your cig lighter in the car, and you mount it on the windshield like a radar detector. Works off of satelittes I guess.

 

The moates software is used on a laptop and connects to your car using a aldl cable. It uses speed, time, drag, and weight to calculate all the info. The g-tech is a standalone device needing only power and its calculations are all done using sensed gforces.

 

I have some track times to compare to G-Tech. Since I had to drive to a suitable spot out in the country to G-Tech my car, I will give you my track time when my car was hot, just as it would be by the time I G-Teched it. My best G-Tech time was 12.65 @ 114.2 MPH. At the track with a hot car, I ran 12.656 @ 106.90 MPH. Although I did end up running 12.395 @ 109.53 MPH when the car was cooled off. I would say the G-Tech is pretty accurate ET-wise.

 

First, second and third!!!!! Ha

 

Yeah, I don't see that combo spinnin slicks thru 3 gears.