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

bluestyle55

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.

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2009 370z 6MT Touring w/ Sport Pkg | Invidia Gemini CBE| Stillen G3 CAI | ERZ HFC's |X-Pel Clear Bra | 20% Tint

m4a1mustang

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.

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theDreamer

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.

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jtown82

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

Z eliminator

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.

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bluestyle55

Yea, I was wondering about the tire pressure. I usually lower it for auto cross but wasnt sure how much or how little for the drag.

Haha...MASH

nice theory. Anyone else do this?

Although I don't care as much about reaction time because its not factored into my final qtr mile time

Yea, I am a dumb *** and didnt think about driving through the water and getting my tires wet. I was too caught up in the moment. I will either drive around next time or do a small tire spin to clean them off.



Thanks for all the feedback guys!

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2009 370z 6MT Touring w/ Sport Pkg | Invidia Gemini CBE| Stillen G3 CAI | ERZ HFC's |X-Pel Clear Bra | 20% Tint

280z/300zx

Yes, a good rule of thumb is to leave the light on the third yellow. With good practice you will be cutting near perfect rxn times. Of course as already discussed, it does nothing for your times.

BOLIO 671

Reaction time may have not have anything to do with your ET, but I personally feel that it can give you the edge over your opponnent....The quicker you get off the line than he does the better chance you have on winning or if not, giving him/her a run for their money...

Trying not to Mash off the line is kinda Hard...especially if you got the jitters...It takes a lot of time and practice...

Here is a clip of a pretty decent launch...He is revin' at about 3K...(Fast forward to the 1:40 mark)...but don't know what his mods are or whether he's running slicks or Street Tires.

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Snakes709

thats me, only mod at the time was G3 intakes, stock tires, which were actualy at 45~ psi...never got a chance to check them until i got home, damn dealership for some reason put them that way. As you said, i got the jitters and accidently dumped the clutch causing a horrible 60' time. Sorry for the video being so long, didnt know the guys were going to prep the horrible track.

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frost

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

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steveg78

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

XwChriswX

Honda CRX?

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k20z3

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

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B1nks

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

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.

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