Anyone know how accurate the g-tech data acquisition tool is that plugs into your cigarette lighter and you stick to you windshield?For those that dont know you put you vehicle weight in and accelerate your car from a stop,it supposed to tell you your horsepower.I came up with 212 hp for my car,but my car also has a partially plugged cat.

 

I dont have any personal experience, but I remember reading on here that it was pretty accurate give or take 2-3 tenths.

 

.2 or .3 is ALOT...

i'd be more concerned with consistency. that way you can use it to measure each mod. if it reads 10 different readings on 10 different runs that are all exactly the same car...there is something wrong...

but if it is within .05 or so on each run....i would think it would be good for finding how much you gain/lose from a mod.

i've also heard the ETs are good, but the mph are a bit high....but that it IS consistent

 

I heard the same on 1/10-2/10 off, but mph is high. As for hp range I haven't heard anything about it.

Vinny

 

I also have heard the mph is off on the 1/4 mile times but the times are close. I bought one hoping I wouldn't have to press so many buttons before getting my stats. They list a margin of error in the booklet.

 

Remember your first time at the track? How many inconsistant runs did you get, if you wanna check its accuracy take it to the track, I plan to take mine. When I first bought it I ran a 14.2 spinning, went to the track and ran the same thing, but after I practiced I got the times down, so it can be accurate if set up right.

 

It said I ran a 14.8 my first pass and a 15.1 on my second.212 hp was the highest reading I could get.My first pass was 197 hp.big difference.

 

The orginal g-tech is not very accurate at all. When my car was stock it gave me 336 rwhp and a 13.1 quarter mile @ 107. With the mods I have now it gives me 394 rwhp and 12.4 quarter mile @ 112.

Real dyno testing results:
stock: 291 rwhp
current : 313 rwph

stock 1/4 mile: 13.8 @102.5
current 1/4 mile : 13.5 @107.1 (very bad traction )

It is not very accurate. Usually 3-5 tenths off and about 5 mph off


The NEW g-tech pro (or whatever its called) is actually pretty accurate, I have not personally tested it but talked to many people who have and it is within 1-2 mph and 1-2 tenths.