how to get a good launch - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Jonas240 · 07-06-2002, 06:23 PM

hey guys i have a 93 240 hatch with the engine mostly stock and i have some futura tires ( car came with them) tread is average, now whats a good rpm to launch at i mean a good launch i dont want to burn that long, help please

mrdirty · 07-06-2002, 08:47 PM

Dunno about anyone else but:
-I ramp up to about 5k
-Release the clutch while increasing the throttle; modulate clutch to keep engine at ~ 5.5k

I have a vlsd so even if i burn out a bit it'll pick it up and i won't loose too much time; if u have a open diff however, you may want to let the clutch out a bit slower and be a bit more carefull (an open diff under burn out will produce roughly half the torque to the ground as a limited slip; w/ a limited slip i find it easier to lay down the torque just enough to chirp one of the rear tires and let the vlsd pick it up.)

The best way is to experiment, it's hard to expain a good launch but you'll know right away when you've done it right.

Sorry that was so long winded, i've been doing calculus all day again <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>

drifting240sx · 07-06-2002, 10:31 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Release the clutch while increasing the throttle; modulate clutch to keep engine at ~ 5.5k

</td></tr></table><span id='postcolor'>
wont that burn your clutch??

well what i do is rev it up to 2.5k - 3k then just drop the clutch.

mrdirty · 07-07-2002, 07:03 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (drifting240sx @ July 06 2002,11:31)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Release the clutch while increasing the throttle; modulate clutch to keep engine at ~ 5.5k

</td></tr></table><span id='postcolor'>
wont that burn your clutch??

well what i do is rev it up to 2.5k - 3k then just drop the clutch.</td></tr></table><span id='postcolor'>
Yeah, it does put more wear on your clutch this way but gets the most power down faster; usually when people are trying to launch (ie 1/4, street racing) they're willing to put a bit of wear onto the clutch to get that extra bit of power...

BTW: if you're talking about side-stepping the clutch (sounds like it) this puts a huge shock load onto the clutch; which is worse? It's a toss up.

07-06-2002, 10:31 PM	#3
drifting240sx Zilvia Junkie Join Date: Oct 2001 Location: salinas ca Age: 41 Posts: 362 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Release the clutch while increasing the throttle; modulate clutch to keep engine at ~ 5.5k </td></tr></table><span id='postcolor'> wont that burn your clutch?? well what i do is rev it up to 2.5k - 3k then just drop the clutch. __________________ PROJECT SIL-80

07-06-2002, 06:23 PM	#1
Jonas240 Join Date: Apr 2002 Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	hey guys i have a 93 240 hatch with the engine mostly stock and i have some futura tires ( car came with them) tread is average, now whats a good rpm to launch at i mean a good launch i dont want to burn that long, help please

07-06-2002, 08:47 PM	#2
mrdirty Zilvia Addict Join Date: Mar 2002 Location: Thunder Bay Ontario Age: 47 Posts: 650 Trader Rating: (0) Feedback Score: 0 reviews	Dunno about anyone else but: -I ramp up to about 5k -Release the clutch while increasing the throttle; modulate clutch to keep engine at ~ 5.5k I have a vlsd so even if i burn out a bit it'll pick it up and i won't loose too much time; if u have a open diff however, you may want to let the clutch out a bit slower and be a bit more carefull (an open diff under burn out will produce roughly half the torque to the ground as a limited slip; w/ a limited slip i find it easier to lay down the torque just enough to chirp one of the rear tires and let the vlsd pick it up.) The best way is to experiment, it's hard to expain a good launch but you'll know right away when you've done it right. Sorry that was so long winded, i've been doing calculus all day again <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>

07-07-2002, 07:03 AM	#4
mrdirty Zilvia Addict Join Date: Mar 2002 Location: Thunder Bay Ontario Age: 47 Posts: 650 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (drifting240sx @ July 06 2002,11:31)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Release the clutch while increasing the throttle; modulate clutch to keep engine at ~ 5.5k </td></tr></table><span id='postcolor'> wont that burn your clutch?? well what i do is rev it up to 2.5k - 3k then just drop the clutch.</td></tr></table><span id='postcolor'> Yeah, it does put more wear on your clutch this way but gets the most power down faster; usually when people are trying to launch (ie 1/4, street racing) they're willing to put a bit of wear onto the clutch to get that extra bit of power... BTW: if you're talking about side-stepping the clutch (sounds like it) this puts a huge shock load onto the clutch; which is worse? It's a toss up.