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G-tech Pro

Munna

By Munna,
in Engines & Forced Induction

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R32 Zilla Community Regular

R32 Zilla

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My g-tech times ..... 12.2 0-400m and 4.0 0-100 (did this twice)

Drag strip times ..... 11.9 0-400m (did this twice)

The g-tech times were done on a road surface with much less grip than the wsid surface, so i think the g-tech is fairly acurate.

Car is R32 GTR.

Some mods include:

PFC

R34 N1 Turbos

Twin plate clutch

Tim.

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djr81 Grand Master

djr81

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Just brought a G-tech off e-bay and test my car it could manage 0-100 in 4.9 and 0-400m in 13.4. Who else has one of these? how acurate have you found it compared to the drag strip ect? Whats results did you get? (please include mods)

cheers

GTechs are quite repeatable and hence, if set up correctly, accurate.

Some things to consider:

The GTech will make a correction to your start time/reaction time when logging quarter mile times. It does this also for 0 - 100 runs. Check up in the manual to see how it works. If you remove the correction the 0 - 100 times will be more accurate.

If the rpm's are calculated correctly you can cross check the timing from the acceleromter with the engine revs. All you need to do is work out how many revs in second/third gear equates to 100km/h.

Best bet to help you understand what is going on is to export the data as a csv file & plot it yourself.

Lastly, set it up as level as possible & then make sure you do a calibration run.

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Munna Rising Star

Munna

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Just brought a G-tech off e-bay and test my car it could manage 0-100 in 4.9 and 0-400m in 13.4. Who else has one of these? how acurate have you found it compared to the drag strip ect? Whats results did you get? (please include mods)

cheers

Thanks guys. I seem to have a high MPH around 109 -110 does that sound about right for the times I am getting.

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R32 Zilla Community Regular

R32 Zilla

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As far as I know, mph readings on a g-tech are the speed that you are doing at the end of the 400m, where as on a drag strip I think it is an average speed between a certain point on the strip (not sure where exactly, but close to the end) and the finish line. So the mph will be a bit higher on the g-tech.

Tim.

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Lithium Grand Master

Lithium

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Posted
Just brought a G-tech off e-bay and test my car it could manage 0-100 in 4.9 and 0-400m in 13.4. Who else has one of these? how acurate have you found it compared to the drag strip ect? Whats results did you get? (please include mods)

cheers

Thats really really interesting, I used a Passport GTimer before and after my S-AFC (which when I got, I tuned to ~10.5psi as well). Before hand I ran a 14.0 @ 101mph (0-60mph in about 5.6s) and backed that up at the dragstrip with a 14.1 @ 103mph... poor track condition the day I raced. The GTimer btw, seems to try and give a trap speed more indicative of the strip.... I used to have a GTech, and that would give on average 4mph higher trap speeds than were realistic in my experience.

After I got the car tuned, I ran 4.9s 0-60mph and 1/4 in 13.4 @106mph on the GTimer.... and my car dynod at 190rwkw on a local dyno. As much as anything

I just thought it was quite cool how close all the results were.

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Munna Rising Star

Munna

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Had another couple of goes last night managed 13.3's this time @ 112.8 and 111.5 MPH (im slowly getting better). My car was tuned @ 195rwkw since then ive added r32 actuator so it now holds 11psi to redline where as it used to trail off to 9psi with the bleeder. I have also added a partitioned apexi pod and a cold air feed. Would be interesting to see what its makes on a dyno now after those small changes. It is certainly very inerseting to see how similar our results are.

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djr81 Grand Master

djr81

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Had another couple of goes last night managed 13.3's this time @ 112.8 and 111.5 MPH (im slowly getting better). My car was tuned @ 195rwkw since then ive added r32 actuator so it now holds 11psi to redline where as it used to trail off to 9psi with the bleeder. I have also added a partitioned apexi pod and a cold air feed. Would be interesting to see what its makes on a dyno now after those small changes. It is certainly very inerseting to see how similar our results are.

Munna,

Best thing about the later model GTech's is the ability to download the runs from the GTech to you computer. You can then analyse the runs & work out how to go quicker, eg launch better, change gear at certain rpm etc etc.

Do you have any files? If you want to post 'em I'm sure people would be interested.

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