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Datalogging 2nd gear pull?
Hi all,
I know it's been said that best data is typically a 3rd gear pull but for those that want to respect the speed limit as best as they can, how off would a 2nd gear pull be? |
3rd or 4th gear gives you a lot more data to look at because they take longer to run out. You'll get the same data, but a smaller sample size.
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Note, you can't just do the run at lower throttle to get more data because it needs to be a WOT pull.
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you'll want to do runs in 3rd gear, so that the ramp rate allows sufficient time to gather data, especially with lower sampling rates (anything less than 16-18hz). i have to do my pulls in 4th for high boost now because it just spins all the way through 3rd, so i know what you mean about high speed being a bad thing. it gets hairy sometimes :).
also i believe you're na, but for anyone with FI you'll want to remember to turn traction control off before the pulls. it will close the throttle and ruin your run. |
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Any other tire with noticeably more grip= unsafe for street/rain conditions. |
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Reading direct RAM address = fast 20Hz or so Reading OBD parameters = slow |
So I did the 3rd gear pull and wow, my IAM was screwed up , and this was on vpower 91 (1.5 gallon remaining - immediately topped up with 94 E10) - started at .57 and slowly went up to .86 at end of drive.
I've documented my issues here on this thread if any of you would like to chime in, would greatly appreciate it! |
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