What RPM should i launch at? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

gregshin · 09-26-2001, 09:54 AM

What RPM should i launch at the light? just in case someone pulls up on me at a light? I have a S14 with no mods.

*drifterx* · 09-26-2001, 10:27 AM

keep practicing... only way to know your own car... u wanna drop the clutch and just launch with a little wheel squeek... u dont wanna smoke on a good launch.....

*LanceS13* · 09-26-2001, 10:36 AM

Start around 2500 and dump the clutch.  If it bogs dump it at 2750 next time.  Keep bumping it up 250rpm every time you try until you spin out.  Say you spin the tires pretty good at 3250...so drop it back to 3000.  Basically do what drifterx said...just experiment and see what works best.  Generally for our cars on street tires, it's gonna be somewhere around 2500-3000.  You'll know you launched right when there's no bog and you hear a small chatter from the rear wheels.

konkman · 09-26-2001, 02:51 PM

I find that if I let the clutch out when holding it at 2750 rpm's it will bog down.  But when I let the clutch out as I am reving up to 2750-3000 she'll turn the tires and launch real nice.  Other wise she bogs down like an old man on the shitter.

AJ · 10-01-2001, 03:31 PM

so the ideal launch requires you to dumb the clutch as in DROP the clutch..?  shouldn't you slip it just a lil so u don't spin but keep ur rpm's up so u'll have more power when your wheels catch?  

Zexel · 10-01-2001, 03:54 PM

hey AJ, not proving you wrong or anything, but that doesn't work.  my friend told me that he tried that a lot of times in a row, and just didn't happen.  so just put the clutch all the way down, rev to whatever rpm you desire, and then let it out.  and like everyone else is saying, if you squeel too much, take it down 250 rpm's etc etc.  

S13Grl · 10-01-2001, 04:52 PM

The peak in the torque power band is at 4500 RPMS. I think if you have an LSD and some good tires, you can do this safely. My sweetheart (not my boyfriend in his S14 but my S13) does it great at about 2500 RPMS. Just my .02....

*LanceS13* · 10-01-2001, 07:23 PM

slipping the clutch may help, but it's hard to do and it's harder on the clutch.  You'll probably want to start at a higher rpm also if you slip it.
Another thing I completely looked over when I said that you'd typically dump between 2500 and 3000....this could change a good bit with tire compound, tire diameter, road surface, road conditions, etc.  The last time I tried it, I pinned it between 2500-2750...but that was with 195 tires and really worn/gritty pavement.  This weekend I tried it with my new 225 tires on good pavement and it launched pretty good with some wheel spin at 3500 and some bogging at 3250.  On black top/asphault, it might even be up to 3750.

my240likenoother · 10-01-2001, 07:34 PM

when i went to the track last year i droped the tire psi to 15 lbs and reved up to 3000 and dumped the clutch the rear end sunk down and took off like a bat out of ####
but that is the track i warmed up the tires nice and they were putting down that sticky crap
ohh ya if you do race at the track stay out of the watter they put down for thge spin it gets on the  wheel wells and dripes down on the tires when you r wating for the lights

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09-26-2001, 09:54 AM	#1
gregshin Zilvia Junkie Join Date: Aug 2001 Posts: 338 Trader Rating: (0) Feedback Score: 0 reviews	What RPM should i launch at the light? just in case someone pulls up on me at a light? I have a S14 with no mods.

09-26-2001, 10:27 AM	#2
drifterx Premium Member Join Date: May 2001 Location: boston, ma Age: 40 Posts: 1,533 Trader Rating: (0) Feedback Score: 0 reviews	keep practicing... only way to know your own car... u wanna drop the clutch and just launch with a little wheel squeek... u dont wanna smoke on a good launch.....

09-26-2001, 10:36 AM	#3
LanceS13 AutoX Junkie Join Date: Jun 2001 Location: MS Age: 39 Posts: 2,044 Trader Rating: (0) Feedback Score: 0 reviews	Start around 2500 and dump the clutch.  If it bogs dump it at 2750 next time.  Keep bumping it up 250rpm every time you try until you spin out.  Say you spin the tires pretty good at 3250...so drop it back to 3000.  Basically do what drifterx said...just experiment and see what works best.  Generally for our cars on street tires, it's gonna be somewhere around 2500-3000.  You'll know you launched right when there's no bog and you hear a small chatter from the rear wheels.

09-26-2001, 02:51 PM	#4
konkman Zilvia Junkie Join Date: Aug 2001 Posts: 534 Trader Rating: (0) Feedback Score: 0 reviews	I find that if I let the clutch out when holding it at 2750 rpm's it will bog down.  But when I let the clutch out as I am reving up to 2750-3000 she'll turn the tires and launch real nice.  Other wise she bogs down like an old man on the shitter.

10-01-2001, 03:31 PM	#5
AJ Zilvia Addict Join Date: Aug 2001 Location: Cincinnati Ohio Posts: 793 Trader Rating: (0) Feedback Score: 0 reviews	so the ideal launch requires you to dumb the clutch as in DROP the clutch..?  shouldn't you slip it just a lil so u don't spin but keep ur rpm's up so u'll have more power when your wheels catch?

10-01-2001, 03:54 PM	#6
Zexel Zilvia Member Join Date: Jun 2001 Posts: 262 Trader Rating: (0) Feedback Score: 0 reviews	hey AJ, not proving you wrong or anything, but that doesn't work.  my friend told me that he tried that a lot of times in a row, and just didn't happen.  so just put the clutch all the way down, rev to whatever rpm you desire, and then let it out.  and like everyone else is saying, if you squeel too much, take it down 250 rpm's etc etc.

10-01-2001, 04:52 PM	#7
S13Grl Married to the Mob Join Date: Dec 2000 Age: 40 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	The peak in the torque power band is at 4500 RPMS. I think if you have an LSD and some good tires, you can do this safely. My sweetheart (not my boyfriend in his S14 but my S13) does it great at about 2500 RPMS. Just my .02....

10-01-2001, 07:23 PM	#8
LanceS13 AutoX Junkie Join Date: Jun 2001 Location: MS Age: 39 Posts: 2,044 Trader Rating: (0) Feedback Score: 0 reviews	slipping the clutch may help, but it's hard to do and it's harder on the clutch.  You'll probably want to start at a higher rpm also if you slip it. Another thing I completely looked over when I said that you'd typically dump between 2500 and 3000....this could change a good bit with tire compound, tire diameter, road surface, road conditions, etc.  The last time I tried it, I pinned it between 2500-2750...but that was with 195 tires and really worn/gritty pavement.  This weekend I tried it with my new 225 tires on good pavement and it launched pretty good with some wheel spin at 3500 and some bogging at 3250.  On black top/asphault, it might even be up to 3750.

10-01-2001, 07:34 PM	#9
my240likenoother Zilvia FREAK! Join Date: Aug 2001 Posts: 1,261 Trader Rating: (0) Feedback Score: 0 reviews	when i went to the track last year i droped the tire psi to 15 lbs and reved up to 3000 and dumped the clutch the rear end sunk down and took off like a bat out of #### but that is the track i warmed up the tires nice and they were putting down that sticky crap ohh ya if you do race at the track stay out of the watter they put down for thge spin it gets on the  wheel wells and dripes down on the tires when you r wating for the lights