1/4 and 1/8 Mile RacingTalk about track times, launch techniques, strategies, etc. Check out the "Timeslips" subforum for posted times.No discussion of street racing will be tolerated.
I still haven't found my best launch but today I got to play on an intertial type dyno and they let me try 10+ launches in 5min. It may be slightly off a real dragstip but It's a hella way to practice and a lot easier than public streets.
For the longest time I did a 2K rpm clutch dump then tried to battle the wheel hop and tire spin until I hooked up. I could always pull 2.22-2.30 that is nothing to brag about.
last time at the track I got almost 30 runs in and finally found a method that works for me. It's a low rpm launch, 1k rpms at the most. I kinda just scoot slowly off the line then lay into the throttle. It's just like comming off the line when driving normal for the first few feet then gettin on it. I can pull 2.1x all day with this method and have pulled as low as 2.14.
I still haven't found my best launch but today I got to play on an intertial type dyno and they let me try 10+ launches in 5min. It may be slightly off a real dragstip but It's a hella way to practice and a lot easier than public streets.
Sup Brian. Yeah, when they strapped up my baby, and the guy hit it, my heart just about skipped a beat. The whole front end shimmied to the right side (as it always does when hitting it hard from a stop) and I coulda sworn the car was coming off the rollers. It was cool though, and the mustang dyno proved to be fairly accurate with whp and 1/4 times. Im still miffed about the no torque reading, but for $20, you can't go wrong. Glad to see ya there.
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Ferbs
Sterling Mist
02 Nissan Maxima Auto
Best et and trap 14.60 @ 95.80 2.27 60'
Best 60' 2.195 - Sumitomo HTR+
Berk Intake/Cattman Ypipe.
Need: 2.1xx 60' time. She has 14.50's in her...
For the longest time I did a 2K rpm clutch dump then tried to battle the wheel hop and tire spin until I hooked up. I could always pull 2.22-2.30 that is nothing to brag about.
last time at the track I got almost 30 runs in and finally found a method that works for me. It's a low rpm launch, 1k rpms at the most. I kinda just scoot slowly off the line then lay into the throttle. It's just like comming off the line when driving normal for the first few feet then gettin on it. I can pull 2.1x all day with this method and have pulled as low as 2.14.
O.k. I thought I was just crazy, because that's the exact technique that i get the best results from too. I launch right at 1k for about 5 feet then hammer it down. I pulled my personal best of 2.20 with this and could do alot better if i wasnt on these all season junkyard tires
O.k. I thought I was just crazy, because that's the exact technique that i get the best results from too. I launch right at 1k for about 5 feet then hammer it down. I pulled my personal best of 2.20 with this and could do alot better if i wasnt on these all season junkyard tires
I pulled my 2.14 and many other sub 2.1x's on junkyard all season 205/65/15.
I rev up to 4000rpms and slip the clutch a little. This nets me low 2.20s and got me a PB of 2.18 today. I tried the 1500rpm "walk out" and all it got me was 2.25 60 foots and a bog thru 1st. My car must be a pig because it needs a hard launch to run it's best.
BTW, this is on all-season Sumitiomo HTR200 215/60R15.
Dave
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2003 Black G35 sedan automatic
Best ET: 14.32, Best MPH: 99.87mph
Mods: MD spacer, HR y-pipe, RevUp airbox, Z-tube, 05 sedan midpipe, 350Z/Coupe springs, lots of other stuff
Sold -1996 Black SE 5-speed MEVI & JWT ECU equipped
14.31@99.34mph with a 2.18 60'
Oddly enough ive gotten my best 60' on undersized 205-55/16s that i bought the car with. It was a 2.11, launched at about 2800rpms, slip the clutch and floor it.
Since ive put my my 225-55/16 Yoko AVS ES100, i cant seem to break hiiigh 2.2-2.3 60ft using every technique possible...
Eric
__________________ '01 Dodge Stratus R/T Coupe 5-speed - Black on Black/Gray Leather...
im launching around 2500 .. i do the same routine or try to. at first yellow stage light, i get everything like i like it. i dont care if it takes a few more seconds ...ha ha! im staging !
then once i get my feet right where it feels good, i ease up and then ease the rpms up to 2500 and stick it there. when its time to go .. i let it go depending on wheel spin, i will make adjustments
i would imagine with so many different factors from car to car, you just have to keep testing it out to see where the limit is.