Quote:
Originally Posted by MspiredM3
Yea, that's what I meant, with the Gintani kit... How did your car do at Famoso and Sacramento on the Vbox compared to your actual slips?
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Here you go for both, Robert analyzed the data for me. "NHRA" mode was my idea, but Robert deserves full credit for doing the Math / Formula, etc. I can't find my slip for the best run from Famoso when we went together, going by memory my best trap was 127, and ET was 11.7, 60' was 2.1. But looking at the one slip you posted when we ran against each other at Famoso, the trap speed was approx 1mph difference (slip vs vbox) so it's consistent at Famoso then and now, Warren confirms this as well with his results. I'd rather use the best run, even if one of the slips is by memory, cause I didn't do very well against you on that head to head run, lol, regardless the Vbox data is consistent with that one run as well as others, and should apply here.
ESS @ Famoso:
____________ 60-Ft. | 1/8-ET _ 1/8-TP _ 1/4-ET _ 1/4-TP _ D.A.
vBox Raw: _________ | 07.524 @ 103.53 _ 11.337 @ 130.54 _ 0680
vBox NHRA: _ 2.040 __ 07.524 @ 101.89 _ 11.337 @ 129.50 _ 0680
Time Slip: _ 1.976 __ 07.487 @ 101.48 _ 11.308 @ 129.34 _ 0680
Gintani @ Famoso:
____________ 60-Ft. _ 1/8-ET _ 1/8-TP _ 1/4-ET _ 1/4-TP _ D.A.
vBox Raw: ___________ 07.809 @ 101.21 _ 11.717 @ 127.97 _ 1896
vBox NHRA: _ 2.176 __ 07.809 @ 099.70 _ 11.717 @ 127.05 _ 1896
Time Slip: _ 2.1x ____________________ 11.7X @ 126.?? _ 1896 *(Can't locate the actual slip, going by memory and the Vbox files, car did trap 128 on the Vbox in another run)
Gintani @ Sacramento:
____________ 60-Ft. _ 1/8-ET _ 1/8-TP _ 1/4-ET _ 1/4-TP _ D.A.
vBox Raw: ___________ 07.591 @ 103.10 _ 11.416 @ 130.41 _ 1166
vBox NHRA: _ 2.059 __ 07.591 @ 101.43 _ 11.416 @ 129.34 _ 1166
Time Slip: _ 2.064 ____ 7.635 @ 102.84 _ 11.459 @ 131.67 _ 1166
As you can see, when you compare the RAW vBox data to the actual timeslip, the 1/8 and 1/4 mile trap speeds are higher. Sacramento actually reads higher on the slip for the 1/4 mile trap, but the ET appears to be accurate . It looks as if the Vbox inflates the 1/8th mile traps a bit more than the 1/4 mile traps, but when recalculating in NHRA Mode you can figure out what an actual track would read for both traps. Once you view the vBox data in "NHRA mode," then you can see it lines up very well with the actual time slip.
The Drag Times calculator allows you to reasonably compare changes in density altitude. It normalizes the results to sea level. Since I don't have all 3 timeslips, I used the vBox NHRA results with the Drag Times calculator to adjust for density altitude. These are the results when normalized to each other.
ESS Adjusted ET/Trap: 11.375 @ 129.536 (Famoso)
Gintani Adj. ET/Trap: 11.629 @ 128.013 (Famoso)
Gintani Adj. ET/Trap: 11.381 @ 129.753 (Sacramento)