Best way to launch a car

[Tuck&Poke]

hey im going to race at a competition in about a week and i wanted to know the best way to launch a front wheel drive car through the 1/4mile.  its not my car its an integra type r and i dont really know how to drive it that well.  he wants me to race it cause im a better driver (hehe)

[DSC]

I assume it would be the same trick in ff or fr cars. Rev the engine and drop the clutch. Trick is, don't spin the tires. You have to rev it as high as possable without spinning the tires and drop the clutch. In the 240 its just under 2krpm. Tires might bark once, I think thats ok...kindof a sign saying you launched at the highest possable rpm without spinning the tires.

[Chokudori]

Wouldn't you get better replies at a ITR forum?

[AJ]

umm,, u dont' want to drop the clutch like that.... all the people i have talked to say u want to keep ur car in it's power range,, so rev to 3500 or so,, slid the clutch without letting the tires spin,, and slowly let off pretty fast,, but don't! doN"T! drop it... that just makes the tires WANT to spin,... sliidddee the clutch out....,, ... thats the best way to launch z28's anyway,,, ummm,, let me know if i'm completely wrong,, but i'm pretty sure this is the way to do it most effectively.

[DSC]

Hehe, AJ we told ya once b4 <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'><img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> <a href="http://www.zilvia.net/forums/cgi-bin/topic.cgi?forum=1&topic=464" target='_blank'>http://www.zilvia.net/forums/cgi-bin/topic.cgi?forum=1&amp;topic=464</a>
now that I reread that topic...my tires must suck <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

[AJ]

read lances post.... he semi agrees,, slippin helps... u get ur power well above 3 grand... if u slip and keep it there u get a lot more power pulling for longer than if u dump at 3... which makes ur rpms drop to 2... and then they have to rise again... &nbsp;by keeping the rpm's higher,, u can get more power to the ground during the first 1 -2 seconds of launch... i'm almost poss it is better this way, if i'm wrong, i'm only wrong for 155 hp cars... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'> &nbsp;i'm going to go outside and roast my tires a lil bit and c which works better...

[AJ]

is harder on the clutch tho...

[S14Pilot]

As a Civic Si owner, I think I can help you on this one. &nbsp;On the Si, you want to launch at around 3600-4000 rpm. &nbsp;The ITR will probably be about the same. &nbsp;You may want to make a couple practice launches in the car before you race. &nbsp;

As for slipping or dumping...Hondas allow you to completely dump the clutch without causing any damage. &nbsp;I always dumped mine at 3900 for the best quarter times. &nbsp;However, a friend of mine ran an increadible time of 14.9 in a GSR and he always slips the clutch. &nbsp;It can be done either way...as long as you know how to correctly perform the move. &nbsp;I never had much luck slipping the clutch. &nbsp;And don't be afraid to shift gears as fast as possible. &nbsp;I shift so quickly now that my syncros can't quite keep up, but at 32,000 miles, I've never had a problem with the tranny. &nbsp;Honda builds them pretty strong.

[blaqsilvia]

Whats a good launch for a 240sx? I have a 95(just got it 2 months ago and its sooo sweeet)-- anyways-- for racing-- whats the best way to launch the baby--THanks

[Tuck&Poke]

thanks blaqsilvia. &nbsp;thats kinda what ive been doing except i dumped at 3000 flat. &nbsp;ill try both slipping the clutch and dumping. &nbsp;anywho what do you think the horsepower would be on that car (the type r) with an aem cold air intake and i think theyre unorthodox pulleys, and a vtec control set at 5,800? &nbsp;btw what the crap is it with everyone worried about breaking theyre trannies. &nbsp;theyre not made of plastic they can handle a lot more than just dumping the clutch and peeling out. &nbsp;plus dumping the clutch wears it out less. &nbsp;it only wears while its slipping. &nbsp;i made a forum on clutches and this guy gave me a link to an awsome website that explains everything. &nbsp;look for it. &nbsp;they dont break that easy. &nbsp;and dont start telling me stories about your freinds friends friend who fucked around with his tranny and fucked it up. &nbsp;cause most of the time theyre either exagerating or saying it so that if they loose a race people will think its &nbsp;cause his tranny is screwed. &nbsp;i know cause my boys do it and i do too sometimes

get some fat ass mofo slicks and drop it at 7k range.....hehehe...sorry i don't know....just wanted to say that...

[DSC]

NEVER drop the clutch! It will f*ck up your tranny and your clutch big time. My friend's friend has a 92 civic hb thats lowered and has a sweet body kit color and changing paint. He put in his new 6 puck unsprung clutch and it broke his tranny in half and now he can't use his clutch either. Did I mention his bad ass type r sticker?

[LanceS13]

I haven't really tested either method, so I don't know which is actually faster. &nbsp;Dropping is harder on the drivetrain...tranny, driveshaft, diff, axles, etc. but is the easier method. Slipping is harder on the clutch and harder to perfect. &nbsp;What I've been doing is sort of a quick slip (not quite a drop or slipping) from 3200-3500rpm. &nbsp;I don't know if it's the fastest method, but hearing the wheels chatter w/o really breaking traction all the way to full throttle is pretty reassuring.
I say for the ITR, try a similar approach starting around 4500-5000rpm.

[LanceS13]

And about the mods...
the ITR has a pretty efficient intake track stock so I'm thinking 5hp max gain from that. &nbsp;Since the engine is handbuilt and practically factory race-prepped, the pullies might not be a huge gain either...probably 5hp max gain again. &nbsp;Not sure about the VTEC controller...I'm guessing that will add more mid range and won't affect max hp. &nbsp;I figure you're probably somewhere around 205hp with a slightly beefier midrange than stock.