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Old 09-07-2012, 10:33 AM   #1
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Launch/Shift techniques?

Anyone have any track time?

I have been hitting up the local T&T's and the best I can muster is a mid 14 and 98mph ish.

I am running the Goodyear F1 supercars on 07 GT500 rims, a pypes mid muffler exhaust. Everything else is stock.

I have tried launching at 2000 to 3500 and it blows the tires up with or without traction controll.

I have tried launching below 2000 and it falls on its face with or without traction controll...that throttle lag really pi$$es me off.

I can't really air down too much, there is no sidewall to speak of and I dont have the coin right now for drag radials.

I've power shifted and it blows up the tires and I have granny shifted without much better results

Anyone find a sweet spot or a good lauch technique? Where are you shifting? How are you shifting?


Thanks,

Junior
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Old 09-07-2012, 11:01 AM   #2
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Re: Launch/Shift techniques?

What are your 60 foot times? Describe your 'launch'?

I launch at 5500 RPM on street tires with an initial slip then dump.
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Old 09-07-2012, 11:14 AM   #3
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Re: Launch/Shift techniques?

So youre short shifting first?

Track prep at the track I run is suspect, guys with full on drag cars complain on a regular basis but on street tires its moot.

My 60's are in the 2.2 to 2.6 range, I've had horrible 3 + sec 60's too. I have played with a few launch techniques. I've rolled up to 2500 to 3000 and dumped it, done the same at lower RPMs, I've rode the clutch out a bit at various RPMs. I've short shifted off a 2200rpm launch, ran 1st out to about 4k and shift at about 5700rpm. Ive power shifted 2nd and 3rd but that puts me sideways...

The best time I had was with 30 psi, a 2500 launch, shift to 2nd at about 4500 then shift at 5800...ran a 14.4 at 3500ft elevation.

jsut trying to get a feel for what others are doing. A few of the guys out there with modded Mustangs are going off idle on street tires, I tried but she falls flat and I end up with 3 sec 60's.

What tires are you running?
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Old 09-07-2012, 11:26 AM   #4
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Re: Launch/Shift techniques?

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Originally Posted by JUNIORS08GT View Post
Anyone have any track time?

I have been hitting up the local T&T's and the best I can muster is a mid 14 and 98mph ish.

I am running the Goodyear F1 supercars on 07 GT500 rims, a pypes mid muffler exhaust. Everything else is stock.

I have tried launching at 2000 to 3500 and it blows the tires up with or without traction controll.

I have tried launching below 2000 and it falls on its face with or without traction controll...that throttle lag really pi$$es me off.

I can't really air down too much, there is no sidewall to speak of and I dont have the coin right now for drag radials.

I've power shifted and it blows up the tires and I have granny shifted without much better results

Anyone find a sweet spot or a good lauch technique? Where are you shifting? How are you shifting?


Thanks,

Junior
I couldnt get much better than that,,the best i got was 14.2,,thats with a sct tuner,,i acually thought i red light,,because it was such a delay that i punch it on the first light,,the rest of my times were 15.2 and 14.8,,i figure back to the drawing board for more power,,wasnt even fast enough for a helmet,,embarrasing..When i first got the car,,its been 20 years since i had anything fast,,i read it would do 13.8 so i figured hell with the tuner i should be in the mid 13s..and it felt like i was hauling ***,,then i found out reality it was a 15.2,,so i kept trying ,,but kinda left with my tail between my legs,,I almost traded her for the 5.0,,but i figured i could do some things later to improve
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Old 09-07-2012, 11:36 AM   #5
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Re: Launch/Shift techniques?

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Originally Posted by JUNIORS08GT View Post
So youre short shifting first?

Track prep at the track I run is suspect, guys with full on drag cars complain on a regular basis but on street tires its moot.

My 60's are in the 2.2 to 2.6 range, I've had horrible 3 + sec 60's too. I have played with a few launch techniques. I've rolled up to 2500 to 3000 and dumped it, done the same at lower RPMs, I've rode the clutch out a bit at various RPMs. I've short shifted off a 2200rpm launch, ran 1st out to about 4k and shift at about 5700rpm. Ive power shifted 2nd and 3rd but that puts me sideways...

The best time I had was with 30 psi, a 2500 launch, shift to 2nd at about 4500 then shift at 5800...ran a 14.4 at 3500ft elevation.

jsut trying to get a feel for what others are doing. A few of the guys out there with modded Mustangs are going off idle on street tires, I tried but she falls flat and I end up with 3 sec 60's.

What tires are you running?
I am running nitto 555 275/40/18 and no I do not short shift. Just launch at 5500. I shift 1-4 at 6800. 35 PSI to the tune of a 1.812 60'.

Shift at cut off. 6200. Try rolling out like a light, no launch. Sounds like tires. My tires grip just as well on the street, not at 5500 launching though lol. Try 1800 RPM or even leaving at idle. Are you lowered? With proper suspension, you won't go sideways, just forward.

The track hurts feelings lol
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Old 09-07-2012, 12:39 PM   #6
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Re: Launch/Shift techniques?

It sure does hurt feelings, I feel the car has more in it but who knows.

I am not lowered, my next trip out I will try to see what I can do, dumping is not an option at any RPM, the tires just blow up..hell, I have pulled 2nd and 3rd and they break out and put me cockeyed. Pucker factor of 10 when you hit 3rd and the centerline is now your lane...


I know a lot of it is driver skill, and I will get better with time. I have a feeling this is really realted to my skill and the tires. I have talked to a few friends who are old racers from way back and they are in agreement. I just hate to drop a bunch of money for drag radials. If I can find a set used I may pop. I have some 10" centerlines at my disposal if I can find a set of tires.

A buddy is a solid 13.5 with street tires, tune, intake and long tubes and offroad h-pipe. his is an auto. I am thinking I am not too bad at mid 14's in a stock car...
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Old 09-07-2012, 12:47 PM   #7
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Re: Launch/Shift techniques?

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Originally Posted by JUNIORS08GT View Post
It sure does hurt feelings, I feel the car has more in it but who knows.

I am not lowered, my next trip out I will try to see what I can do, dumping is not an option at any RPM, the tires just blow up..hell, I have pulled 2nd and 3rd and they break out and put me cockeyed. Pucker factor of 10 when you hit 3rd and the centerline is now your lane...


I know a lot of it is driver skill, and I will get better with time. I have a feeling this is really realted to my skill and the tires. I have talked to a few friends who are old racers from way back and they are in agreement. I just hate to drop a bunch of money for drag radials. If I can find a set used I may pop. I have some 10" centerlines at my disposal if I can find a set of tires.

A buddy is a solid 13.5 with street tires, tune, intake and long tubes and offroad h-pipe. his is an auto. I am thinking I am not too bad at mid 14's in a stock car...
You have plenty left. the s197 will run mid to high 13s. Your friend is not doing too well lol.

Your tires are the culprit it seems, I have every bolt on short of a s/c an I don't twist in any gear unless super cold out or wet.
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Old 09-07-2012, 01:14 PM   #8
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Re: Launch/Shift techniques?

What elevation you at, we are over 3500ft here, plays a huge roll in the numbers. Lots of guys at the strip run lover numbers here than at a few other stips in the state.

I do agree that the car has more in it. I just need to hone my skill and get some tires that will stick to find its true potential.

how well do the Nittos you have wear? The last set of Nitto tires I had were on my truck and didnt last 25K...I need to find a balance.
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Old 09-07-2012, 01:19 PM   #9
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Re: Launch/Shift techniques?

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Originally Posted by JUNIORS08GT View Post
What elevation you at, we are over 3500ft here, plays a huge roll in the numbers. Lots of guys at the strip run lover numbers here than at a few other stips in the state.

I do agree that the car has more in it. I just need to hone my skill and get some tires that will stick to find its true potential.

how well do the Nittos you have wear? The last set of Nitto tires I had were on my truck and didnt last 25K...I need to find a balance.
The sticker the tire the less the life.

Nitto for 25k would be awesome actually lol. I am hoping for 15k with light driving haha.

Well elevation does matter. Plus temps. 3500ft is a major detail to leave out lol.
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Old 09-07-2012, 01:35 PM   #10
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Re: Launch/Shift techniques?

yeah, I am in Tucson and its always hot and the elevation is not ideal. My buddys BB, blown 55 Chevy will run low 10s all day long in the mid west during drag week but when he T&T's here he is only good for mid 11's
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Old 09-07-2012, 01:56 PM   #11
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Re: Launch/Shift techniques?

Have you used dragtimes.com elevation conversion? It will tell you what you could have run in ideal conditions.
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Old 09-07-2012, 02:05 PM   #12
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Re: Launch/Shift techniques?

no, but I will check it out, thanks!
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Old 09-07-2012, 02:18 PM   #13
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Re: Launch/Shift techniques?

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Originally Posted by JUNIORS08GT View Post
no, but I will check it out, thanks!
Easiest way to do it is to select the actual track and date and the approximate time you ran and it will have the exact barometer, humidity and temperature for that time of day.
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Old 09-08-2012, 02:57 AM   #14
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I have nitto drag radials with a few mods such as cam, CAI, full exhaust, pulleys and a mild Dyno tune and I can get out of twelves lol I can't run a 12.4 to save my life. I have ran 12.5 4 different times but can't get that 100th of a second down. Trust me elevation matters. I run at beech bend drag way in bowling green KY(where the NMRA's are held each year)
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Old 09-08-2012, 07:43 AM   #15
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Quote:
Originally Posted by Graham1992
I have nitto drag radials with a few mods such as cam, CAI, full exhaust, pulleys and a mild Dyno tune and I can get out of twelves lol I can't run a 12.4 to save my life. I have ran 12.5 4 different times but can't get that 100th of a second down. Trust me elevation matters. I run at beech bend drag way in bowling green KY(where the NMRA's are held each year)
That's a good time. I've raced there many times over the years with AMRA, very well preped track. We always ran faster there, due to the lower elevation.
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Old 09-08-2012, 02:45 PM   #16
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Re: Launch/Shift techniques?

My 07 GT is pretty much stock except CAI, Straight exhaust, street tires, and Bama tuned. My best run, and believe me I'm slow on reaction times, .458, but still ran a 14.0073 at 100.78mph. I know the car is faster, and should be a mid 13's car the way it is. I did lower the tire pressure to 15lbs, and that helped somewhat...
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Old 09-09-2012, 09:18 AM   #17
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Re: Launch/Shift techniques?

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Originally Posted by banditleader View Post
My 07 GT is pretty much stock except CAI, Straight exhaust, street tires, and Bama tuned. My best run, and believe me I'm slow on reaction times, .458, but still ran a 14.0073 at 100.78mph. I know the car is faster, and should be a mid 13's car the way it is. I did lower the tire pressure to 15lbs, and that helped somewhat...
Reaction time has ZERO bearing on your 1/4 mile time. So don't sweat it

Lowering PSI on street tires is a wash. CAI & Tune is good for low 13s.
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Old 09-11-2012, 11:11 AM   #18
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Originally Posted by Borii

You have plenty left. the s197 will run mid to high 13s. Your friend is not doing too well lol.

Your tires are the culprit it seems, I have every bolt on short of a s/c an I don't twist in any gear unless super cold out or wet.
X2 a stock gt were high 13s in the quarter mile which is only a second behind the new 5.0
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Old 09-11-2012, 02:29 PM   #19
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Re: Launch/Shift techniques?

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X2 a stock gt were high 13s in the quarter mile which is only a second behind the new 5.0
While I agree on the estimates, I must 1 second is not "only" 1 second. 1 second is a lifetime in the 1/4. Stock for stock 12.8 vs 13.8 is murder. A 5.0 will obliterate a 4.6 stock for stock. when cars are 1 second apart in the 1/4, they are not even close.
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Old 09-11-2012, 03:11 PM   #20
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While I agree on the estimates, I must 1 second is not "only" 1 second. 1 second is a lifetime in the 1/4. Stock for stock 12.8 vs 13.8 is murder. A 5.0 will obliterate a 4.6 stock for stock. when cars are 1 second apart in the 1/4, they are not even close.
Iam not disagreeing with you their
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Old 09-11-2012, 03:28 PM   #21
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Re: Launch/Shift techniques?

You need to get rid of the Goodyear F1's. They are too hard, and the gt500 guys that i know say they are junk.
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Old 09-11-2012, 04:55 PM   #22
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Re: Launch/Shift techniques?

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You need to get rid of the Goodyear F1's. They are too hard, and the gt500 guys that i know say they are junk.


they are awful...if you've never run them on a track...dont. It is a$$ puckering. The old timers at the track have been hounding me about the tires too...the suck in the rain too...day to day driving tho...not a bad tire
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