Shift times between gears?
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From: Covington WA, USA
In terms of using the datalogger for shifting evaluation, I have actually been more interested in looking at my downshifting. I thought that most of the time I was pretty smooth, but the accelerometers don't always agree. You can see every little jerk on the car, and it shows I have some work to do in terms of heel/toe technique.
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From: Santa Cruz, CA, US
Originally Posted by rlaifatt,Jan 12 2006, 03:59 PM
SOW, which is the shortest track at 1.5 I think, is 11-12 upshifts (plus similar number of downshifts!). I am usualy sore after a weekend.
CCW: 4>3>2>3>4>3>2>3>2>(3>2)>3>4 yeah damn 11 or 13 total shifts,
so not 12 upshifts as you said, still a lot in 1.5 miles
CW: 4>3>2>3>2>3>2>3>4>3>2>3>4 - 13 shifts
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From: Covington WA, USA
fencepost error: Rather than counting the numbers, count the carats (the actual shifts). otherwise you double count the "4" on either end. Unless you skip gears, the total number of shifts should be even....
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From: Encinitas (San Diego), CA
Originally Posted by krazik,Jan 13 2006, 04:58 PM
Thinking.. 11-12??? really??
CCW: 4>3>2>3>4>3>2>3>2>(3>2)>3>4 yeah damn 11 or 13 total shifts,
so not 12 upshifts as you said, still a lot in 1.5 miles
CW: 4>3>2>3>2>3>2>3>4>3>2>3>4 - 13 shifts
CCW: 4>3>2>3>4>3>2>3>2>(3>2)>3>4 yeah damn 11 or 13 total shifts,
so not 12 upshifts as you said, still a lot in 1.5 miles
CW: 4>3>2>3>2>3>2>3>4>3>2>3>4 - 13 shifts
CW: 4>3>2>3>2>3>2>3>4>3>2>3>4>3>2>3>2>3>4 (18)
CCW: 4>3>2>3>2>3>4>3>2>3>2(>3>2)>3>2>3>4 (14-16)
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From: Encinitas (San Diego), CA
[QUOTE=jzr,Jan 13 2006, 02:53 PM]This (incorrect) correlation between an increase in shift speeds and the decrease in lap times is often made.
The thing to note is that while person A may be shifting more quickly than person B, person B is not stopped while they are shifting - they are still moving along at their pre-shift speed.
The thing to note is that while person A may be shifting more quickly than person B, person B is not stopped while they are shifting - they are still moving along at their pre-shift speed.
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From: Covington WA, USA
Originally Posted by rlaifatt,Jan 13 2006, 08:35 PM
it is much more important to brake smoothly to settle and control the car for the corner than to brake harder late
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From: Dublin, OH
Originally Posted by jzr,Jan 13 2006, 05:53 PM
This (incorrect) correlation between an increase in shift speeds and the decrease in lap times is often made.
The thing to note is that while person A may be shifting more quickly than person B, person B is not stopped while they are shifting - they are still moving along at their pre-shift speed. What they're missing out on is that much extra moment of acceleration.
In most all cases, spending .x less time on shifts will not result in a .x quicker laptime, it will in fact be something smaller.
This often comes up as an argument against shorter gears, the argument being that the extra time spent shifting will negate the extra thrust, which usually isn't the case.
The thing to note is that while person A may be shifting more quickly than person B, person B is not stopped while they are shifting - they are still moving along at their pre-shift speed. What they're missing out on is that much extra moment of acceleration.
In most all cases, spending .x less time on shifts will not result in a .x quicker laptime, it will in fact be something smaller.
This often comes up as an argument against shorter gears, the argument being that the extra time spent shifting will negate the extra thrust, which usually isn't the case.
On a very long straight like the one at VIR, the Civic Si I was in was in 5th for what seemed like 10 seconds and you come out of a second gear corner (Oaktree) so your speed out of that corner and shifting times and points (how high you actually revved the engine) was a major factor in the lap time. This is unless you screwed up something else in the lap.
When Matt tries this at his next track day and posts data, you all can see.
I still maintain that this is still a worthwhile subject because you're not doing anything else on the straight as far as controlling the car than upshifting so you may as well try to optimize it!
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