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Old 04-30-2009, 11:40 PM   #1
06STi
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Default Drag Strip 101

So I took my car out to the 1/4 mile last night at Sears Point Raceway Nor-Cal. Didnt have a clue what I was doing.
Posted a best 13.2 @103 mph with a r/t .062 and a 60' of 1.9 and tons of wheel spin 1st and 2nd. 25+ mph head wind.
Running a ATP gt3076R with fmic and all the mods to go with.

I had the dccd in "lock".
Dropped the tire psi down to 25 psi but was running my 18's nt03's

So onto the questions.
What should I launch the car at ?
I was at 4600 and in 1st gear which I tagged boost cut hard on one run. Someone said launch in 2nd gear.

DCCD? should I have it on auto or dial in to lock. On lock I spun all 4 tires even into 2nd gear.

I'm going to run the bbs wheels next week. That should help a bit.

But what are some tricks to hit the 12's? I'm new to the drag racing world so please be nice My car is more geared towards road racing.
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Old 04-30-2009, 11:44 PM   #2
cireturbo
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103mph trap with a 3076R and supporting mods? Something isn't right.

You've got stage 2 trap speed, considering this your time isn't actually too awful. It's definitely capable of high 12's with that trap, but that turbo should at least be trapping another 10mph.
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Old 04-30-2009, 11:48 PM   #3
godforbid67
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Tricks to hit 12's? If a "trick" was used with that turbo it would be a trick that got you into the 10's, my friend
How much boost? gas? Dyno sheet?
Man im sorry, but this thread makes me !!!!
Learn to drive brother!
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Old 04-30-2009, 11:50 PM   #4
stu
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i would leave it in auto for now and rev to about 5500 or 6000 and a little slip of the clutch.
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Old 04-30-2009, 11:50 PM   #5
06STi
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Yeah thats why I'm here I know my driving skills are not up to par. So I'll work on that. But I need to figure out the set up better.
Oh and it was on cali 91 piss gas.

My mods are
ATP GT3076R EWG (OEM location, EWG top of turbo hotside)
Tial 44mm EWG
Dwks 740's
Perrin V1 Fuel Rails
HKS Custom Catless Downpipe
JIC Ti Full 3 inch Catback
APS FMIC
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GM Boost 3 port Sillynoid
Cosworth Highflow Oil pump
Cosworth Airpump delete plates
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Cosworth Bearings
Cosworth Head Gasket

ACT Flywheel
RPS Clutch
Steel braided clutch line
Short Shifter
6 Spd
F&R lsd's
Steel braided brake lines
Brembo Brake Calipers
Axis Pads
DBA 5000 Two piece slotted rotors
5x114 Hubs
STi CV Axles

Tein Flex Rebuilt / Revalved (Going Ohlins Flags)
Tein EDFC
Tein Camber Plates F&R
Swift Springs
Cusco Strut Bars
RPM Under Frame Brace
Whiteline Bump Steer Kit
Whiteline Anti Lift Kit
Whiteline Steering Rack Bushings
STi Steering Rack
STi Steering Rack Subframe (Yes there is a differance)
STi Front Alum Control Arms
6 Gun Front Hubs (-2* camber machined into the hubs)
Cusco Adjustable Trailing Arms
Whiteline Adjustable Lateral Bars
Whiteline Rear Subframe Bushings
Whiteline Rear Lock Dow Bolt Kit
Whiteline Diff Bushings
1.8* Camber Bolts (All 4 Corners)
NT03's 18x9.5 +27
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Old 04-30-2009, 11:51 PM   #6
kellygnsd
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Post up the full timeslip. You don't shift like my grandmama do you?
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Old 04-30-2009, 11:53 PM   #7
06STi
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Quote:
Originally Posted by godforbid67 View Post
Tricks to hit 12's? If a "trick" was used with that turbo it would be a trick that got you into the 10's, my friend
How much boost? gas? Dyno sheet?
Man im sorry, but this thread makes me !!!!
Learn to drive brother!
Boost is 22 psi and the tune is more dd then anything, I told the tuner not to push the engine as I drive it everyday.

Cali 91 piss gas on the run and the dyno sheet.
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Old 04-30-2009, 11:54 PM   #8
godforbid67
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Jesus man with all these mods, no body ever taught you how to drive??
Maybe your set up isnt right, a 1.9 60ft is bad but should still get that car under 12.5's.
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Old 04-30-2009, 11:54 PM   #9
godforbid67
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Quote:
Originally Posted by kellygnsd View Post
Post up the full timeslip. You don't shift like my grandmama do you?
Dude any grandma could shift faster than that if his set up is running good.

P.S- Could you post a pic, id love to see those wheels, sorry to be off topic.
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Old 04-30-2009, 11:54 PM   #10
Illusive
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dyno sheet looks sloppy, should be much smoother than that. I hope that wasn't a "final" tune and just the "highest" # tune for bragging rights.

MPH is horrid something is definately wrong. Detination, crap tune, or hurt motor.

are you able to monitor your boost/af and or log the car?

wanted to edit my car made 260whp on ed's road dyno and i'm able to pull 105mph traps on ca piss 91 with stock turbo.
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Old 04-30-2009, 11:58 PM   #11
06STi
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Quote:
Originally Posted by kellygnsd View Post
Post up the full timeslip. You don't shift like my grandmama do you?
haha..

No.. That was my 1st time ever 1/4 my car. So I am some what happy. Its still running..

64* temp
43% humidity

r/t .062
60' 1.9
330' 5.6
660' 8.5
mph 83.5
1000' 11.0
1/4 @ 13.2
mph @ 103.3
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Old 04-30-2009, 11:59 PM   #12
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Quote:
Originally Posted by cireturbo View Post
103mph trap with a 3076R and supporting mods? Something isn't right.
Definately low for the turbo used - either missed gear shifting, changed gears like a granny, or isn't making much power from it.

As for launch rpm - find the best RPm where you don't bog down and where you don't lose traction - it's a fine balance.

Most tend to slip the clutch around 5000rpm while launching, rather then drop the clutch - but you need to slip it just right so that you don't fry the clutch - if done right, you won't bog down and you won't break traction (maybe just a little screetch off the line).

But regardless of the lauch, with 400whp, you should be able to drive off the line and as long as you change gears correctly you should be running around 115-120mph with a GT3076R based turbo in a GD Sti.
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Old 05-01-2009, 12:00 AM   #13
06STi
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Quote:
Originally Posted by godforbid67 View Post
Dude any grandma could shift faster than that if his set up is running good.

P.S- Could you post a pic, id love to see those wheels, sorry to be off topic.


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Old 05-01-2009, 12:02 AM   #14
godforbid67
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HOT! At least the car looks nice
Who tuned your car?
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Old 05-01-2009, 12:03 AM   #15
06STi
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Quote:
Originally Posted by wrxsti.l View Post
Definately low for the turbo used - either missed gear shifting, changed gears like a granny, or isn't making much power from it.

As for launch rpm - find the best RPm where you don't bog down and where you don't lose traction - it's a fine balance.

Most tend to slip the clutch around 5000rpm while launching, rather then drop the clutch - but you need to slip it just right so that you don't fry the clutch - if done right, you won't bog down and you won't break traction (maybe just a little screetch off the line).

But regardless of the lauch, with 400whp, you should be able to drive off the line and as long as you change gears correctly you should be running around 115-120mph with a GT3076R based turbo in a GD Sti.
Yeah I was not slipping the clutch and I was bogging down I need to shift sooner. But 1st time out I think I was not that bad..... lol I know I need to find some better shift points.
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Old 05-01-2009, 12:05 AM   #16
godforbid67
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Sorry bro but for your first time out, that was real bad.
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Old 05-01-2009, 12:07 AM   #17
06STi
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Quote:
Originally Posted by godforbid67 View Post
HOT! At least the car looks nice
Who tuned your car?
Thanks.. I think moving back to the bbs 17's and taking some negative camber out might help.

Tuner? Dont really like to say. I dont want to hear the bitching or B.S.

I logged all the runs on my lap top. I know my IM was at .81 So the car was not 100%

I sent the logs off to the tuner to see what he has to say.
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Old 05-01-2009, 12:14 AM   #18
06STi
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The log shows
IM @ .81 and not .1
Timing
It hit - 3* once going into 2nd then +4 after that.

AFR was 11.13 @ 100% engine load.

So I think better fuel will also help.
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Old 05-01-2009, 01:07 AM   #19
stu
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Quote:
Originally Posted by godforbid67 View Post
Sorry bro but for your first time out, that was real bad.
give the guy a break he is asking for help, not you smart A$$ coments.

i am sure you were killing it at the track your first time.
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Old 05-01-2009, 01:14 AM   #20
Gts2fast4u
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Well...

I don't know much on tuning and all, but there really arnt "tricks", unless you tune it for more power.

But I wouldn't worry to much of running 12's all the time. Drag racing is to be consistent, not the fastest.

Good luck
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Old 05-01-2009, 01:17 AM   #21
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Make sure you are driving around the waterbox and not through it. Roll back to right before the waterbox, set the DCCD to manual/open, and do a quick redline clutch dump to clean the tires off. Then put the DCCD back to auto or lock and go. That may help with the wheelspin but your MPH is still way low.
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Old 05-01-2009, 08:10 AM   #22
Paul
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Quote:
Originally Posted by stu View Post
i would leave it in auto for now and rev to about 5500 or 6000 and a little slip of the clutch.
Do this^


OP: I got a higher trap in my sti when it was BONE STOCK.....somthing is seriously not rite!
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Old 05-01-2009, 09:22 AM   #23
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I had literally thousands of passes--on motorcycles and dragbikes--before I made my first pass with an STI. Believe me, I knew what it took to get a great ET. Nonetheless, knowledge and application aren't married.

It isn't easy. My first outing was similar. There is nothing wrong, other than some operator error and that's cured by practice and fortitude.

I appreciate your coming on board with humilty and questions. If you knock off 3 tenths each time you go out, you will hit the elevens on your fifth try. Better than me!

Keep it up.

Coop
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Old 05-01-2009, 09:27 AM   #24
jason miller
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I'm also surprised at the trap speed. You don't have a video by any chance?? I'd tend to think either your car's not running correctly, in which case you won't improve the et a whole lot if that's all the car will trap; or else you're performing some seriously slow shifts and/or not shifting at proper locations.
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Old 05-01-2009, 09:45 AM   #25
Irishman
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Don't worry about what some will say, it is not as easy as it looks. Some of these guys can shift like nobodies business but that takes a lot of practice. Keep going and you will find the perfect way to launch and shift. I am still trying to find that point. When you run a bigger turbo it is going to take more finesse because of bogging or lighting up the tires.
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