Mile Run Question!


I wonder what would happen if you went from 1st to third? I mean the car would be at a high rpm at the top of 1st and it has enough torque to pull third pretty hard, you might end up saving time and momentum on the shift.

One of my runs at Mojave I planned to just do an road dyno pull in 4th. I started in 1st to redline and then shifted to 4th to redline, then 5th and 6th. My speed was the fastest of the day at 188.5.
 
That doesn't surprise me. Turbo cars would see even more benefit without the boost dump. One of you TT guys should do a 1st, 3rd, 5th pull and see what the data looks like.
 
Stormcat,

My first thought from the replies was what you alluded to, I thought the stock rev-limiter was set at 6500. So that would make those shifting above that have had some type of mods. I have a Gen 2 whipple so was very interested in the 4th or 5th gear discussion. Seems like everyone thinks around 180-185 you must shift to 5th so that is determined by Horsepower=Speed. Brakes are also an interesting difference. Seems like as Chip said, we are all OK untill you get around the 200+ then that exercise becomes much more important!!:rofl
Next event for me is the Big Bend Open Road Race, Looks like time to go practice Heel / Toe Braking.:banana:banana

Good Answers Guys,

Thanks

Larry

My rev limiter is set at 6700 rpm. I try to shift at 6500 .. The Miami airstrip is much longer than the Goliad strip so braking is less of an issue unless you are running more that 1 mile.
 
That doesn't surprise me. Turbo cars would see even more benefit without the boost dump. One of you TT guys should do a 1st, 3rd, 5th pull and see what the data looks like.

im guessing the car would do around 175 instead of 220.

shifting to 3rd after redlining 1st would put me around 3300-3400 rpm. i make about 290hp at 3300rpm.

when i shift to 2nd, im at 4500rpm and make 600hp

cant wait to rev this thing to 8000. shifting to 2nd would put me at 5300rpm and over 900hp :banana
 
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As several others have mentioned everyone has their own "style" and method of piloting these extremely capable rocket ships down the runway... My driving style for the Texas Mile was dictated by the setup we had at that event.

Car was not tuned to launch, had NO ABS, no traction control, no idle control motor or tuning, and was set up with stock transmission, gearing etc...

Here is what I did...


1. How to start (first gear, none spin) - easy launch of the line, rolling in the throttle so you don't spin the tires... spinning the tires will waste distance without maximum acceleration...
2. What shift points (Stock and modified) - short shifted 1st and 2nd in order to minimize wheel spin as much as possible and get into third, then 4th and 5th as soon as possible to let her run out the back door... shifted at 5500 - 6000 in early gears and 7000 in 3rd, 4th and run through the traps in 5th...
3. What gear to run thru the mile point (I was told 5th)
4. When thru the lights, stopping (This is where I am confused, do you immediately push in clutch and start braking, or let the engine help decelerate you as you brake) -
once you are through the mile marker (make sure you pull all the way through as Cody was letting out at the mile marker or so he thought but you have to go through the second set of beams like a drag strip and he was losing 5 mph)... let off the throttle leaving it in gear, let the car settle and then apply the brakes leaving it in gear to help slow down.. if you want to heel toe then go for it but honestly 5th gear won't lug the motor at 70 mph and you can make the turn at 60 mph if you have to so don't worry about shifting if you don't want to... leaving it in gear helps slow the car down immensely as well as the drag...

5. At what speed does Peak use the Chute? - CARBON BRAKES ROCK HAHA never needed the chute although we will test in Miami just incase...

That is just what worked for me... Hope that helps

:cheers