RPM??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Black 97SE · 04-23-2002, 07:23 PM

when racing? When is a good time to shift? I mean what's the peak HP and TQ at on a 97 240sx with a KA? Don't want to take any chances on losing to a civic hehe.

*DSC* · 04-23-2002, 07:29 PM

155@5600rpm
160lbs@4400rpm

When you shift you want to be put back to peak torque (4400rpm) which works well for our cars because I believe that would be around 5600rmp.  Some say 6k or 6.2krpm but I think thats a bit high.

silviasichigo · 04-23-2002, 07:36 PM

Pratice and when you can feel what is right that is when you compare it to what info is give about powerband. Then when you see that you are in or out of the suggested shift RPM then you tweak it. Until you never faulter again. It takes practice. DSC got it right in the range so pratice that. Do not Dump your clutch because you will waste your time and the persons your racing. If you practice your take off to where you have max power and little to no wheel spin and you get the shifts right you are not going to do bad. If you can pull it off every time then you will more than likely beat someone who has a faster car but can't drive. Practice! Practice! Practice!
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Black 97SE · 04-23-2002, 07:42 PM

for the take off, what would you say is a good RPM to start reving at???  I tried 3, but I get anxious and punch the gas before the clutch is fully off so it revs high then burns out for too long.  Would like 2 be good and try not to get so anxious so by the time the clutch is released, it'll be around 3k?

silviasichigo · 04-23-2002, 07:57 PM

Well I heard something stupid before like 25 and you won't slide?? So if you are the nervous type I would say 25-3000 RPM. If you pratice it it will come. You will know and you will save your clutch. Go out and find a good empty road or area and practice. BECAREFUL though!

Black 97SE · 04-23-2002, 08:01 PM

thanks guys.  I love my car =)

junia · 04-23-2002, 08:21 PM

I rev the engine high and hold the clutch to where it is almost pulling the car foward and I then pull up on the e-brake until I'm ready to take off.  I drop the e-brake and basically let the clutch slide out.  It kills the clutch but I take off the fastest if I do it that way.  I don't do this on the street though only at a drag meet where I'm going for time.

*LanceS13* · 04-23-2002, 10:07 PM

It'll change depending on what you've done to the car and what gear you're in--how the power band has shifted and how much torque is being put to the ground through the gearing.  It feels like my car accelerates best shifting at redline for 1-2, 6200 for 2-3, and 6000 for 3-4 and 4-5 with just exhaust.  If I dynoed the car and got the torque curve I could calculate exactly where the best place to shift is for each gear change.  
5600 sounds mighty low, even for a stock car...unless the power band is lower on the S14; maybe that's why they redline 500rpm lower than the S13. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>  
Does anybody have a stock dyno/torque curve graph?

guidot · 04-24-2002, 08:40 AM

Because the 91-92 had the "hot" cams, they are able to go up higher in the rev range without losing so much power.  The s14 on the other hand with the "mild" cams, gets its peak hp at 5600 (mines 5700 with injen intake).  Therefore you don't want to go too far past that because power drops off sharply....trust me i know.  I was racing my buddy in his Countour (which I have beat before) and i miss shifted in 2-3 (went to 6k) and his rear fender was at my door.  I was pissed!  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'>

nrcooled · 04-24-2002, 11:27 AM

Hey don't knock the contour That was my baby before the 240. SVT though so I definately had to get an SR to have the same fun

SVT contour
200hp at 6625rpm one bad ass family car (not many mods for it that were reasonable)

04-23-2002, 07:29 PM	#2
DSC New Title Join Date: Aug 2001 Location: VA Posts: 3,454 Trader Rating: (0) Feedback Score: 0 reviews	155@5600rpm 160lbs@4400rpm When you shift you want to be put back to peak torque (4400rpm) which works well for our cars because I believe that would be around 5600rmp.  Some say 6k or 6.2krpm but I think thats a bit high. __________________

04-23-2002, 07:36 PM	#3
silviasichigo Zilvia Addict Join Date: Mar 2002 Location: Japan Age: 48 Posts: 782 Trader Rating: (0) Rides Gallery: silviasichigo Feedback Score: 0 reviews	Pratice and when you can feel what is right that is when you compare it to what info is give about powerband. Then when you see that you are in or out of the suggested shift RPM then you tweak it. Until you never faulter again. It takes practice. DSC got it right in the range so pratice that. Do not Dump your clutch because you will waste your time and the persons your racing. If you practice your take off to where you have max power and little to no wheel spin and you get the shifts right you are not going to do bad. If you can pull it off every time then you will more than likely beat someone who has a faster car but can't drive. Practice! Practice! Practice! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=''>

04-23-2002, 08:21 PM	#7
junia Zilvia Junkie Join Date: Jan 2002 Posts: 343 Trader Rating: (0) Feedback Score: 0 reviews	I rev the engine high and hold the clutch to where it is almost pulling the car foward and I then pull up on the e-brake until I'm ready to take off.  I drop the e-brake and basically let the clutch slide out.  It kills the clutch but I take off the fastest if I do it that way.  I don't do this on the street though only at a drag meet where I'm going for time. __________________ 1990 Nissan 240sx hatchback, 1991 Nissan Silvia K's PS13, 1978 Toyota Corolla KE-30

04-23-2002, 10:07 PM	#8
LanceS13 AutoX Junkie Join Date: Jun 2001 Location: MS Age: 42 Posts: 2,044 Trader Rating: (0) Feedback Score: 0 reviews	It'll change depending on what you've done to the car and what gear you're in--how the power band has shifted and how much torque is being put to the ground through the gearing.  It feels like my car accelerates best shifting at redline for 1-2, 6200 for 2-3, and 6000 for 3-4 and 4-5 with just exhaust.  If I dynoed the car and got the torque curve I could calculate exactly where the best place to shift is for each gear change.   5600 sounds mighty low, even for a stock car...unless the power band is lower on the S14; maybe that's why they redline 500rpm lower than the S13. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>   Does anybody have a stock dyno/torque curve graph? __________________ 1992 240SX Fastback #47 DSP MS SCCA RX-7 ITS Project FOR SALE

04-24-2002, 08:40 AM	#9
guidot Zilvia Junkie Join Date: Feb 2002 Location: Cape Cod, MA Age: 44 Posts: 443 Trader Rating: (0) Feedback Score: 0 reviews	Because the 91-92 had the "hot" cams, they are able to go up higher in the rev range without losing so much power.  The s14 on the other hand with the "mild" cams, gets its peak hp at 5600 (mines 5700 with injen intake).  Therefore you don't want to go too far past that because power drops off sharply....trust me i know.  I was racing my buddy in his Countour (which I have beat before) and i miss shifted in 2-3 (went to 6k) and his rear fender was at my door.  I was pissed!  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'> __________________ -Jeff T. 96 240SX 240SXONE http://www.240sxone.com

04-23-2002, 07:23 PM	#1
Black 97SE Zilvia Member Join Date: Apr 2002 Location: Anaheim Hills, California Posts: 217 Trader Rating: (0) Feedback Score: 0 reviews	when racing? When is a good time to shift? I mean what's the peak HP and TQ at on a 97 240sx with a KA? Don't want to take any chances on losing to a civic hehe.

04-23-2002, 07:42 PM	#4
Black 97SE Zilvia Member Join Date: Apr 2002 Location: Anaheim Hills, California Posts: 217 Trader Rating: (0) Feedback Score: 0 reviews	for the take off, what would you say is a good RPM to start reving at???  I tried 3, but I get anxious and punch the gas before the clutch is fully off so it revs high then burns out for too long.  Would like 2 be good and try not to get so anxious so by the time the clutch is released, it'll be around 3k?

04-23-2002, 07:57 PM	#5
silviasichigo Zilvia Addict Join Date: Mar 2002 Location: Japan Age: 48 Posts: 782 Trader Rating: (0) Rides Gallery: silviasichigo Feedback Score: 0 reviews	Well I heard something stupid before like 25 and you won't slide?? So if you are the nervous type I would say 25-3000 RPM. If you pratice it it will come. You will know and you will save your clutch. Go out and find a good empty road or area and practice. BECAREFUL though!

04-23-2002, 08:01 PM	#6
Black 97SE Zilvia Member Join Date: Apr 2002 Location: Anaheim Hills, California Posts: 217 Trader Rating: (0) Feedback Score: 0 reviews	thanks guys.  I love my car =)

04-24-2002, 11:27 AM	#10
nrcooled Nissanaholic! Join Date: Mar 2002 Location: Turn 8 'bout to get rolled by a SC'd ITR Age: 45 Posts: 1,849 Trader Rating: (0) Feedback Score: 0 reviews	Hey don't knock the contour That was my baby before the 240. SVT though so I definately had to get an SR to have the same fun SVT contour 200hp at 6625rpm one bad ass family car (not many mods for it that were reasonable) __________________ '91 hatch w/ SR Sold; '03 Evo Sold 401 HP; '03 MS Protege sold; '00 Evo 6.5 TME Sold 300HP