Well, since the tracks up here are closed, and i didn't get to them.. i'm kinda wondering what i run in the 1/4th and it looks like my alternative way to get a time is with a G-tech. Is the product accurate as they say it is on the site? I don't know if this has been posted b4, but any info would be helpful.
thx
-Abe

_____________________________________________1991 Z28 305 TPI.

Mods: Hypertech Airfoil, gutted airboxes, K&Ns,polished 91' rims (they turned pink!), and all rear end bushings & tranny mout are energy suspension poly ones now

MORE TO COME: Any suggestions on what to do next? I really want to try and make the 305 run 13s (i've mostly been doing basic repair to the car, but now most of its done i have money to mod!)e-mail me@ abraham_39@hotmail.com



[This message has been edited by Abe91Z28 (edited November 23, 2000).]

 

I don't have one, but the popular rumor is that they're within 3% to 5% accuracy. :/

 

I've had one for a few years now and have had it at the track with me a couple of times. It seems to be pretty accurate when it comes to ET's (.05) being slower every time on the G-tech when compared to the slip, but trap speed is always way off about 4-8mph high on the G-tech.

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89Camaro,ZZ4,ported heads,LT4 HOT CAM,Victor Jr,T56 6speed,3:73's

 

I have this unit and my runs in the 1/4 mile were within 1% of the timeslips.

My mph that I was reading off of the unit was always about 3-4mph higher than what the dragstip showed on the timeslip.

The manufacturer claims that this is due to how the unit determines the speed vs the how the mph is calculated at the drag strip.

The drag strip determines the mph based on time that it takes to cover the distance between the second last and last timing lights and therefore the mph that you typically see on the timeslip is based on the average mph. The unit is displaying the instantaneous mph at the end of the 1/4 mile and because of this the unit will usually display a much faster mph.

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355 Dart 2 iron heads 66cc ported and polished 9.5:1 compression, Harland Sharp 1.5:1 roller rockers, KB Hypereutectic pistons, 6" steel rods, Victor Jr, Holley 750 Vac Sec, Engle Solid cam .520"I/.536"E 108 LSA, MSD Digital 6, MSD 8461 dist, Hooker Super Comp long tube headers, 4" Mufflex - no cat, Spohn Torque Arm, LCA & Panhard Bar, welded SFC, 350 THM 3000 Stall, B&M Megashifter, Currie 9" 3.70, Mickey Thompson Sportsman 26X10.5 street tires

0-60ft 1.843 (with stock rear end and stock suspension - pre installation of Spohn equip)

1/4 mile 12.747 @ 109.9 (open headers - just installed 4"Mufflex system)

 

the reason G-tech is about 4-8 mph faster is because it measures the speed AT! 1/4 mile. the track is average. so ive heard. im planning on getting one soon..

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RED82TA5.7L

1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
Eldebrock Headers, 3" Hooker Cat-Back, duel outlet with quad tips.
Mods: 1.6 Proform Roller Rockers, electric fan.

Future mods: X-Ram( Aftermarket Cross-Fire Injection Manifold that proves to have as much power as TPI www.x-ram.com )
Cross-Fire Injection after market chip that says that it will proform like 90's injections.. http://www.turbocity.com/CorvetteCro...ECMUpgrade.htm

[This message has been edited by RED82TA5.7L (edited November 26, 2000).]

 

oops, 1983Z28 explained it. just saw it

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RED82TA5.7L

1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
Eldebrock Headers, 3" Hooker Cat-Back, duel outlet with quad tips.
Mods: 1.6 Proform Roller Rockers, electric fan.

Future mods: X-Ram( Aftermarket Cross-Fire Injection Manifold that proves to have as much power as TPI www.x-ram.com )
Cross-Fire Injection after market chip that says that it will proform like 90's injections.. http://www.turbocity.com/CorvetteCro...ECMUpgrade.htm