First qtr mile run....fail @ 14.6, 105mph

bluestyle55 · 04-04-2010, 10:26 PM

Ok...so I did my first ever qtr mile run the other day with my Z. I goggled before hand to see what the ideal rpm was to drop the clutch and whoever's post I read was wrong because it was a total fail (or my specs / conditions were totally different than his runs). It said 3k was an ideal rpm to let out the clutch.

It was 67 degrees, I had stock tires on, I did not warm my tires up first, and I have full bolt-ons w/ Cobb tune (313 whp).

I spun first, spun second...finally catching 7k in second...chipped 3rd and finished in 14.6 @ 105mph.

Can some of you track gooroo’s give me some advise.

m4a1mustang · 04-04-2010, 10:28 PM

ROFL @ 60'.

Don't worry, bro. You'll get better. I remember the first time I ever went in my Mustang... We are all there at one point. If after your second or third trip you're still cutting lousy 60's there's a problem, but for your first time out... don't worry. Just keep at it!!!

You need to slip the clutch a bit and modulate the throttle if you encounter too much spin. If you spin too hard from 3k launch a little lower or feather the clutch a little more.

Edit: Also, always drive AROUND the water box and do a little dry hop (quick spin of the tires) before you stage to clean off any debris you collected in the pits. You don't want to do a burnout with street tires -- don't want them too hot.

theDreamer · 04-04-2010, 10:30 PM

Focus on the 60' time, which basically is your launch. What is online will be for that person, with X mods, and on that track that day, while for you it might be completely different so you will need to run a few times to find your spot.

jtown82 · 04-04-2010, 11:32 PM

dang thats horrible. 2.6 60ft? how do you even pull out infront of traffic without someone rear-ending you LOL

Z eliminator · 04-04-2010, 11:34 PM

it takes time to figure out how to launch the 370.
im sure you will be in the 12 's soon
Lower your rear tire presure to 27 lbs.
this will help.

frost · 04-04-2010, 11:42 PM

When you dump the clutch at 3k, are you keeping it at 3k, or are you getting antsy and mashing the gas?

steveg78 · 04-05-2010, 02:29 AM

Damn guy in the left lane had a stellar r/t. What was he driving?

k20z3 · 04-05-2010, 02:41 AM

Ha sorry i Just liked the thread title sorry about that man!

B1nks · 04-05-2010, 02:05 PM

Yeah first time I tried to launch mine was on a back road at 2am. I dropped the clutch at 3k and mashed the gas at the same time and it just spun like crazy..well the RPM's did I don't think the clutch actually got to catch because I didn't go anywhere really haha. I then shifted into 2nd and the RPM's flew again and the clutch pedal just remained depressed. Scared the **** outta me because I thought I broke something. I think I got it now because the second time went a lot better, had to kinda let it catch then mash the throttle hehe.

Quidproquo · 04-05-2010, 02:40 PM

Your reaction time was over a second. I'll bet you are waiting until you see the green light before taking off. Try taking off when you see the last yellow. By the time you cross the sensors the light will be green!!!

There's a 13.6 for you right there, even without perfecting your launch control!!

Anyone watch the Nismo 370z on Motorweek this week? They got it to do 1/4 mile in 13.8 sec. Said it was incredibly difficult to launch.

tranceformer · 04-05-2010, 02:46 PM

Quote:

Originally Posted by Quidproquo

Your reaction time was over a second. I'll bet you are waiting until you see the green light before taking off. Try taking off when you see the last yellow. By the time you cross the sensors the light will be green!!!

There's a 13.6 for you right there, even without perfecting your launch control!!

Anyone watch the Nismo 370z on Motorweek this week? They got it to do 1/4 mile in 13.8 sec. Said it was incredibly difficult to launch.

I'm pretty sure the reaction time doesn't affect the ET, Jorge.

XwChriswX · 04-05-2010, 02:46 PM

Quote:

Originally Posted by steveg78

Damn guy in the left lane had a stellar r/t. What was he driving?

Honda CRX?

racerxj17 · 04-05-2010, 02:49 PM

Quote:

Originally Posted by Quidproquo

Your reaction time was over a second. I'll bet you are waiting until you see the green light before taking off. Try taking off when you see the last yellow. By the time you cross the sensors the light will be green!!!

There's a 13.6 for you right there, even without perfecting your launch control!!

Anyone watch the Nismo 370z on Motorweek this week? They got it to do 1/4 mile in 13.8 sec. Said it was incredibly difficult to launch.

he could wait at the line for a week, still would have ran the same time.

theDreamer · 04-05-2010, 02:50 PM

Quote:

Originally Posted by tranceformer

I'm pretty sure the reaction time doesn't affect the ET, Jorge.

Correct, unless you are racing someone.
Reaction time is worthless if you are just going against yourself, you can sit at the green and wait if you want, the clock starts when you roll forward.

m4a1mustang · 04-05-2010, 03:43 PM

I don't know why so many people think RT means anything when you're out at a test and tune. It has no impact on your ET at all.

I was at the track last year and this ricer Scion driver was telling me how he'd be running 9s (8th mile) if only he could have a second off his RT. I didn't rail on the kid but I politely pointed out that RT doesn't matter and you are stuck running 10.99s.

04-04-2010, 10:26 PM	#1 (permalink)
bluestyle55 Premium Member Join Date: Apr 2009 Location: Pa Posts: 194 Drives: 09 Nissan 370z B 6M Rep Power: 16	First qtr mile run....fail @ 14.6, 105mph Ok...so I did my first ever qtr mile run the other day with my Z. I goggled before hand to see what the ideal rpm was to drop the clutch and whoever's post I read was wrong because it was a total fail (or my specs / conditions were totally different than his runs). It said 3k was an ideal rpm to let out the clutch. It was 67 degrees, I had stock tires on, I did not warm my tires up first, and I have full bolt-ons w/ Cobb tune (313 whp). I spun first, spun second...finally catching 7k in second...chipped 3rd and finished in 14.6 @ 105mph. Can some of you track gooroo’s give me some advise. __________________ 2009 370z 6MT Touring w/ Sport Pkg \| Invidia Gemini CBE\| Stillen G3 CAI \| ERZ HFC's \|X-Pel Clear Bra \| 20% Tint

04-04-2010, 10:28 PM	#2 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	ROFL @ 60'. Don't worry, bro. You'll get better. I remember the first time I ever went in my Mustang... We are all there at one point. If after your second or third trip you're still cutting lousy 60's there's a problem, but for your first time out... don't worry. Just keep at it!!! You need to slip the clutch a bit and modulate the throttle if you encounter too much spin. If you spin too hard from 3k launch a little lower or feather the clutch a little more. Edit: Also, always drive AROUND the water box and do a little dry hop (quick spin of the tires) before you stage to clean off any debris you collected in the pits. You don't want to do a burnout with street tires -- don't want them too hot. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook! Last edited by m4a1mustang; 04-04-2010 at 10:30 PM.

04-04-2010, 10:30 PM	#3 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	Focus on the 60' time, which basically is your launch. What is online will be for that person, with X mods, and on that track that day, while for you it might be completely different so you will need to run a few times to find your spot. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

04-04-2010, 11:34 PM	#5 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	it takes time to figure out how to launch the 370. im sure you will be in the 12 's soon Lower your rear tire presure to 27 lbs. this will help. __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

04-05-2010, 02:41 AM	#8 (permalink)
k20z3 A True Z Fanatic Join Date: May 2009 Location: Denver CO Age: 33 Posts: 2,146 Drives: 2006 Civic SI HFP Rep Power: 405	Ha sorry i Just liked the thread title sorry about that man! __________________ 2006 RALLYE RED HONDA CIVIC SI HFP Clint's Helpful Photoshop Hints!

04-04-2010, 11:32 PM	#4 (permalink)
jtown82 Base Member Join Date: Mar 2010 Location: southern Arkansas Posts: 158 Drives: 09 chicane yellow Z Rep Power: 15	dang thats horrible. 2.6 60ft? how do you even pull out infront of traffic without someone rear-ending you LOL

04-05-2010, 02:29 AM	#7 (permalink)
steveg78 Track Member Join Date: Apr 2009 Location: MD Posts: 569 Drives: 09 370Z PG M6 +Sport Rep Power: 17	Damn guy in the left lane had a stellar r/t. What was he driving?

04-05-2010, 02:05 PM	#9 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 507	Yeah first time I tried to launch mine was on a back road at 2am. I dropped the clutch at 3k and mashed the gas at the same time and it just spun like crazy..well the RPM's did I don't think the clutch actually got to catch because I didn't go anywhere really haha. I then shifted into 2nd and the RPM's flew again and the clutch pedal just remained depressed. Scared the **** outta me because I thought I broke something. I think I got it now because the second time went a lot better, had to kinda let it catch then mash the throttle hehe.

04-05-2010, 02:40 PM	#10 (permalink)
Quidproquo Base Member Join Date: Nov 2008 Location: Morris County, NJ Posts: 69 Drives: 2007 350Z CS 6M Rep Power: 17	Your reaction time was over a second. I'll bet you are waiting until you see the green light before taking off. Try taking off when you see the last yellow. By the time you cross the sensors the light will be green!!! There's a 13.6 for you right there, even without perfecting your launch control!! Anyone watch the Nismo 370z on Motorweek this week? They got it to do 1/4 mile in 13.8 sec. Said it was incredibly difficult to launch. __________________ NJZCC: www.njzclub.com

04-05-2010, 03:43 PM	#15 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	I don't know why so many people think RT means anything when you're out at a test and tune. It has no impact on your ET at all. I was at the track last year and this ricer Scion driver was telling me how he'd be running 9s (8th mile) if only he could have a second off his RT. I didn't rail on the kid but I politely pointed out that RT doesn't matter and you are stuck running 10.99s. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

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