RPM's At Launch for the 1/4 mile

Azcheron · Post by **Azcheron** » February 20th, 2004, 5:39 am

Most have said that they launch their ITR's at about 5k-6k and they start off not completely flooring it, and then work their way to full throttle....

what i have to say is this:

last year, my friend mike let me take his ITR for a run at the track, and he gave my GSR a run in return. I ran his ITR the same way i run my GSR, which was this.... i dropped the clutch at about 3k and kept the gas floored the entire time. shifted at 8200 or so each time. Ran a 14.3. His car is 100% stock, and the air in the tires were at about 20 psi. His best run for the night was a 14.6 and he was doing the typical 5500 rpm launch with a 75% gas applied and then flooring it. Just figured id let everyone know. He ran a 15.2 in my GSR (not stock) and i ran a 14.7

shivers · Post by **shivers** » February 20th, 2004, 10:29 am

Most people recommend the first scenario as a starting point so people can figure out what works and what doesn't.

Your technique sounds pretty good and should give others an option to try if they are new to drag racing.

Kangbateh · Post by **Kangbateh** » February 20th, 2004, 2:26 pm

I'll try that and give it a shot, but with turbo 3k is where my turbo kicks in. So I wonder if there will be a lot of wheel spin?

ITR41 · Post by **ITR41** » February 20th, 2004, 6:32 pm

all motor I launched at 7500 on street tires and turbo I launch at 5500

pUrExTc · Post by **pUrExTc** » February 21st, 2004, 2:06 am

launch at 3k...just drop the clutch! not slowly, drop it!

if i do it much higher than 3500, wheel spin!

98cwitr · Post by **98cwitr** » February 22nd, 2004, 4:44 am

pUrExTc wrote:launch at 3k...just drop the clutch! not slowly, drop it!

if i do it much higher than 3500, wheel spin!

thats why you dont drop the clutch, 3,000 is no where near the power band.

5,500 rpms, slip the clutch, dont floor the gas pedal until you gain traction, and say hello to 2.1 60fts.

anything higher than 5,500 and you're just wasting clutch

ITR41 · Post by **ITR41** » February 22nd, 2004, 10:16 pm

I pulled low 2.1 60's at 7500 rpm launchs on street tires at normal presure. also I trapped 2mph faster than when I launched at 5500

ryanthered · Post by **ryanthered** » February 24th, 2006, 9:55 am

I drive a 98' GSR with virtually all ITR parts and what I've found to be best is the 3K launch, If I run it at 5500 i have some unwanted wheelspin.

Sleep1 · Post by **Sleep1** » March 28th, 2006, 11:30 am

Slip the clutch?

I dropped the clutch at 5,000 and tires spun out. How do you Slip the clutch?.

2000 Turbo Type-R

Dave_B · Post by **Dave_B** » March 28th, 2006, 1:34 pm

Sleep1 wrote:Slip the clutch?

I dropped the clutch at 5,000 and tires spun out. How do you Slip the clutch?.

2000 Turbo Type-R

You slip the clutch by not having it fully engaged, thus the clutch disk is really slipping on the PP surface and not allowing the full force of the engine to engage the trans/wheels.

white rocket · Post by **white rocket** » March 28th, 2006, 4:50 pm

Wear the clutch but save the tranny

walker111 · Post by **walker111** » May 24th, 2006, 4:26 pm

I've tried all sorts of rpms. What works the best for me is to launch at 45-5k slip the clutch while applying moderate gas.

Post by **Jan Niemi** » May 25th, 2006, 10:07 pm

walker111 wrote:I've tried all sorts of rpms. What works the best for me is to launch at 45-5k slip the clutch while applying moderate gas.

I don't think he gives a shit, the thread is 2.5 years old

walker111 · Post by **walker111** » May 26th, 2006, 11:47 am

roflmao!!!!!!!!! Gotta love ITRCA!

aznauticab0i · Post by **aznauticab0i** » October 12th, 2007, 5:50 am

5500.... will try 3k since everyone is mentioning it

00-501itrspec · Post by **00-501itrspec** » May 12th, 2008, 9:09 am

walker111 wrote:roflmao!!!!!!!!! Gotta love ITRCA!

Hahaha

i use my ebrake , pull ouyt slightly on the clutch , (READ- PRELOAD)
i also use my 2step , an that is around 5500 rpm
clutch half out ebrake up so its just lurching firward , part throtthe to the 2step , and wham !!!!!

Im OUT !!!!!

559type_r · Post by **559type_r** » June 19th, 2008, 11:00 pm

lolz... i launch at 4k, rpm spin to 8k, that when i get traction than shift at 9k! work pertty good too me! =)

thesheak · Post by **thesheak** » January 15th, 2009, 10:43 pm

my itr is set-up with a jackson racing supercharger and because the boost kicks in at such low rpm i cant dump the clutch with full throttle at anything above 2,000 rpm...i think its safe to say that it really all depends what kind of set-up you have. things like forced induction, tires, tuning, cam set-up, v-tec ingagements, weight reduction, suspension set-up, stage of clutch, or anything like this will change on how you should launch the old b18c5...any one agree?

94vtec2tone · Post by **94vtec2tone** » June 13th, 2009, 7:33 pm

anything over a 2k clutch dump for me. i completely just roast the tires. and im just boltons soon to be itr cams and gears. i tried 3k and 2500 both wont work at all

Martgsr · Post by **Martgsr** » August 3rd, 2009, 1:04 pm

It will all depend of the condition of the track.
I did a lot of drag racing with my integra gsr back in time...
some day, i was able to get 2.0 60ft, some day can`t do better than 2.4 ...
once you know your best 60ft ... when i was seeing those 2.2 and more,
i was just stopping the run knowing I won't beat my best time.

What worked best for me, was 5-6k slip clutch...
...on street tires

ITRCA

RPM's At Launch for the 1/4 mile

RPM's At Launch for the 1/4 mile

3k launch

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Re: RPM's At Launch for the 1/4 mile