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Old 06-10-2004, 02:21 AM   #1
STUDAndring
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Question Launching?

I was wondering if you guys had some advice I would like to learn a little better how to launch my car in the 1/4 mile. I have a '04 WRX with a stage 2 cobb. I have not ran it hard yet because it just now has 1500 miles. but I am going to start running it hard on some tracks. What should I focus on when I launch to get a good 0-60 and 1/4 mile time. Things like RPM's when launching how you let out on clutch to allow the car to get the most out of the take off.
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Old 06-10-2004, 09:59 AM   #2
madSTI
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SEARCH is the magic word. use it

don't take this the wrong way, i'm being nice, compared to some of the others around here
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Old 06-10-2004, 02:15 PM   #3
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1) pulse/blip revs btw 4-7k
2) on 2nd yellow keep your pedal to the floor
3) let off on the clutch, do not slip it, do not dump it...
3a) imagined you just stepped in dog crap, thats how your foot should react BUT do not let the clutch go back on its own weight

that is THE best method, my creation & no one else may take credit for it


<------------there is proof 1, proof 2 is that i just had my tranny checked out & it is in PERFECT condition, but my tranny fluid on the other hand needs to be replaced badly...

that is all
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Old 06-10-2004, 02:40 PM   #4
STI_Jaguar
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I also would like to know more. I did a search and the questions I needed was not addressed.

I am wondering what RPMs I should be in 1st gear? 2nd? 3rd? 4th?

A guy I know says that he hits 6500-7000 on all gears (this was before I broke my car in so I wasn't really paying attention)

When I tried it myself I felt that there was no way to hit 7K in first or second.

Would you still get good results going up to 4-5K in first gear and second before shifting, or am I not maxing out using this technique?
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Old 06-10-2004, 03:00 PM   #5
STUDAndring
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you need to hit 6 at least I think. If you have a ECU upgrade you should hit 7 then shift because you are at max power between 5 and 7 after ECU upgrade.
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Old 06-10-2004, 04:40 PM   #6
2002WRXSTi
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Quote:
Originally posted by Hassassin
1) pulse/blip revs btw 4-7k
2) on 2nd yellow keep your pedal to the floor
3) let off on the clutch, do not slip it, do not dump it...
3a) imagined you just stepped in dog crap, thats how your foot should react BUT do not let the clutch go back on its own weight

that is THE best method, my creation & no one else may take credit for it


<------------there is proof 1, proof 2 is that i just had my tranny checked out & it is in PERFECT condition, but my tranny fluid on the other hand needs to be replaced badly...

that is all
Beware however..as I finally got the launch down pat and on my last run of the night it felt so good as it hooked off the line then BAM BAM I broke one half shaft and the other hub.

I did this on Neo Gens too so it wasn't like I was using a sticky slick. That and it was hot as all hell with a lousy barometer so I shouldn't even have been making decent power either
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Old 05-06-2005, 11:08 PM   #7
AudiTTkiller
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Quote:
Originally Posted by 2002WRXSTi
Beware however..as I finally got the launch down pat and on my last run of the night it felt so good as it hooked off the line then BAM BAM I broke one half shaft and the other hub.

I did this on Neo Gens too so it wasn't like I was using a sticky slick. That and it was hot as all hell with a lousy barometer so I shouldn't even have been making decent power either


if your making 400 whp then you should expect soemthing like that to happen
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Old 05-06-2005, 11:17 PM   #8
2002WRXSTi
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Quote:
Originally Posted by AudiTTkiller
if your making 400 whp then you should expect soemthing like that to happen
Happened when I was making under 300whp. Engine and ECU were stock at the time.
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Old 06-10-2004, 05:03 PM   #9
thesmokingman
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Quote:
Originally posted by STUDAndring
you need to hit 6 at least I think. If you have a ECU upgrade you should hit 7 then shift because you are at max power between 5 and 7 after ECU upgrade.
WRX heads stop breathing after 6000 ish rpms. Shift sooner.
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Old 06-10-2004, 07:11 PM   #10
Hassassin
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Quote:
Originally posted by thesmokingman
WRX heads stop breathing after 6000 ish rpms. Shift sooner.
you have no idea what you're talking about, shift at 6500-7k every gear
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Old 06-10-2004, 07:46 PM   #11
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Quote:
Originally posted by Hassassin
you have no idea what you're talking about, shift at 6500-7k every gear

seconded.
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Old 06-10-2004, 08:31 PM   #12
2002WRXSTi
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Question

I dunno...seems if I shift at lower RPM I am going faster. If I shift at 7000 I am in the 13's but if I shift at 6500 I got 12.7's. The last run I was gonna try shifting at 6200 or so but I broke both my rear axles so I was trailered for the night
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Old 06-11-2004, 12:34 AM   #13
Hassassin
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Quote:
Originally posted by 2002WRXSTi
I dunno...seems if I shift at lower RPM I am going faster. If I shift at 7000 I am in the 13's but if I shift at 6500 I got 12.7's. The last run I was gonna try shifting at 6200 or so but I broke both my rear axles so I was trailered for the night
well it all depends on where exactly you hit peak power, on the stock ecu most HP peaks at anywhere btw 6-6.5k, so to be safe shifting at 7k is good, but hey shifting at 6.5k might be better for some
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Old 06-11-2004, 02:01 AM   #14
dan avoN7
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it mostly depends on what turbo your running. Shifting at 6k is pretty stupid because you will be at too low rpm in the next gear.
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Old 06-11-2004, 02:53 AM   #15
STUDAndring
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My problem is that after I shift into second I get a lag on my next gear. The turbo bogs is that because I am dumping the clutch or is that totally normal is there a way for me to minimize the lag on it.
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Old 06-11-2004, 11:42 AM   #16
dan avoN7
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Quote:
Originally posted by STUDAndring
My problem is that after I shift into second I get a lag on my next gear. The turbo bogs is that because I am dumping the clutch or is that totally normal is there a way for me to minimize the lag on it.
if your lagging after the 1-2 shift then your not shifting fast enough. I used to have the same problem when i put in the vf30 (yes its not huge but i noticed a difference) I would shift then the rpms would drop too low and the turbo would have to spool again. Because of this i relized i wasnt shifting correctly or fast enough. Now when i do the 1-2 shift the front end doesnt dive, just stays up and the car pulls hard.
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Old 06-11-2004, 06:37 PM   #17
2002WRXSTi
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I let off the throttle a slight amount on the first second shift but then flat shift the rest of the gears. Seems to work best for me that way.
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Old 06-12-2004, 03:11 AM   #18
thesmokingman
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Quote:
Originally posted by Hassassin
well it all depends on where exactly you hit peak power, on the stock ecu most HP peaks at anywhere btw 6-6.5k, so to be safe shifting at 7k is good, but hey shifting at 6.5k might be better for some
Stock wrx heads stop breathing well at the upper regions. Do with it what you will, but the amount of thrust available above 6500 is at a reduced rate versus the area below that.

BTW, remind me to stop backing you up. There are many ways to the same goal. Thanks for telling me I have no idea wth I'm talking about.
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Old 06-12-2004, 07:23 AM   #19
turbo2nr
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Arrow launching

I have at least 500 runs on two different wrxs. It is the most difficult car to launch in the world! This is my favorite way with a manual trans for this car.
1) lightly depress throttle untill you see 5500rpm and try to maintain while watching the tree
2) do not side step clutch, do not release slow, but somewhere in between.
3) a little front left wheel spin is good
4) do not paint traction compound (VHT) on tires or you will break something
5) sticky, wide tires will also break something
6) a stock clutch is strong enough to break everything!
7) i have had over 300 launches at dragstrip with only half wear on one clutch, that includes many smoked clutches( that is when you are taching out in first, but are going no where) clutch will be ok after it has cooled, just leave drag strip and do some semi hard shifting for twenty min. it will come back to life
8) I have nipped into the 10S with major car lightining, dogbox, 500hp avo turbo, nitrous, no exaust at all, no bumpers, swaybars, airbags, a/c, lightweight seats, no crash bars, no sub-frame connector. I inject methanol/water to prevent detonation along with 116octane fuel. also i pack my top mount intercooler with ice or better yet, dry ice in the pits. the extra volume of piping for a front mount greatly increases turbo lag. fmi is ok for street and road racing, but my top mount will chill better for short duration drag.(using ice or dry ice)
9) i can't wait untill east coast shootout '04
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Old 06-12-2004, 12:25 PM   #20
Hassassin
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Quote:
Originally posted by thesmokingman
Stock wrx heads stop breathing well at the upper regions. Do with it what you will, but the amount of thrust available above 6500 is at a reduced rate versus the area below that.

BTW, remind me to stop backing you up. There are many ways to the same goal. Thanks for telling me I have no idea wth I'm talking about.
o ok so now 6000 all of a sudden turns into 6500...
all i said was the truth, you shift at 7k to be conservative or 6700 or so if you really wanna be nit-picky, you said to shift SOONER then 6000rpms which is the dumbest remark i have ever heard because no matter how you are making your power, it'll peak btw 6-7k on a wrx, so shifiting sooner then 6k is the last thing you'd want to do!

back me up? i have no idea waht your talking about. didnt mean to be harsh but sometimes the truth isnt pretty.
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Old 06-12-2004, 10:39 PM   #21
thesmokingman
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Did I say shift sooner than 6000rpms? If my post was unclear, ask for a clarification. Peak power comes 1K rpms before redline, thus what's the point in staying in it till 7K like the convention says to? Thats my point. It would have been easier if you asked me to clarify, instead of the typical way in which you reacted. Now I know.
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Old 06-12-2004, 11:54 PM   #22
Hassassin
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Quote:
Originally posted by thesmokingman
WRX heads stop breathing after 6000 ish rpms. Shift sooner.
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Old 06-13-2004, 08:59 AM   #23
ride5000
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imo, although not optimal, it's not really the heads--it's the turbo running out of steam. there are plenty of folks out there with bigger turbos making quite nice power all the way to 7200rpms.

jm2c
ken
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Old 06-13-2004, 10:51 AM   #24
Hassassin
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Quote:
Originally posted by ride5000
imo, although not optimal, it's not really the heads--it's the turbo running out of steam. there are plenty of folks out there with bigger turbos making quite nice power all the way to 7200rpms.

jm2c
ken
exactly... he gets all up in a hissyfit for nothing... jeeeeeez
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Old 06-15-2004, 07:57 AM   #25
eurodick
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i like cicadas
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