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Old 07-03-2008, 07:23 PM   #1
Auto0utcast
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Default 2004 sti embarrasses itself @ track...

ok before i list out the times im going to give u all a little backround. the car is a 2004 psm STi. full interior, 2 amps, one 12" sub in a slot ported box and i had a small charcoal grill in the trunk for the up comming holiday...

car has a built block (stock compression) 100mm cp pistons, carillo h-beam rods, acl bearings, arp head studs, stock heads/cams/valvetrain with a 3" inlet 8cm^2 exhaust housing FP GREEN! pushing 23psi on pump through the stock topmount intercooler... 3" catless downpipe (helix) to the stock sti catback. car is on stock clutch which is giving me fits... this car dyno'd 346hp/344tq uncorrected and 366hp/364tq SAE corrected at moon performance on these settings this past january...now on to the rundown... 5 runs... lebanon valley dragway last night... outside temp ranged from 83* at first run to 72* at last run.

1st run:
r/t..... .069
60'..... 2.203
330..... 6.103
1/8.....9.159
mph..... 81.79
1000.....11.741
1/4.....13.951
mph....102.84

run #2

r/t..... .224
60'..... 2.026
330..... 5.667
1/8..... 8.604
mph..... 84.42
1000..... 11.131
1/4..... 13.308
mph...... 104.16


run #3

r/t..... .002 <----f'n right doggy
60'..... 2.163
330.....5.963
1/8.....8.964
mph.....83.06
1000.....11.545
1/4.....14.031
mph.....86.16 (missed 5th)

run #4

r/t..... .344
60..... 2.044
330.....5.800
1/8..... 8.810
mph..... 82.75
1000..... 11.372
1/4..... 13.569
mph..... 103.28

run #5

r/t..... .324
60'..... 2.073
330..... 5.942
1/8..... 8.962
mph..... 82.77
1000.... 11.526
1/4..... 13.719
mph..... 103.59

F*** THIS CLUTCH!!! its either spin/bog, bog, grab then let go... or i miss a gear...im disappointed to say the least... from a roll i pull HARD on cars trapping faster.... i think the issue is bogging out of the hole but meh.. whatever.
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Last edited by Auto0utcast; 07-03-2008 at 08:23 PM.
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Old 07-03-2008, 07:27 PM   #2
tux121
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Do you have Launch Control? It makes things alot easier! I never bog anymore! But that shifting is all you SON!
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Old 07-03-2008, 07:30 PM   #3
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no launch control... first time ever to the track with this car... tried launching from 4k, 4500, 5k, and 5500... it was either too low and would bog, or too high and would spin, then bog. tried different differential settings... best result was dccd rolled all the way to the rear?
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Old 07-03-2008, 07:39 PM   #4
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Really? I've done a 4.5k rpm launch without Launch Control and I can make that baby spin the tires.

DO NOT SET THE DCCD 100% REAR!

Oh yeah what kind of turbocharger are you running?
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Old 07-03-2008, 07:45 PM   #5
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PRACTICE...........




Quote:
Originally Posted by tux121 View Post
Really? I've done a 4.5k rpm launch without Launch Control and I can make that baby spin the tires.

DO NOT SET THE DCCD 100% REAR!

Oh yeah what kind of turbocharger are you running?
as for spinning tires it all comes down to what kinda tires your using.

as for setting it on 100 percent rear. thats drivers preferance. when i had my 04 STi ussually used full rear depending on the surface (road)

i think its safe to say his using a stock turbo?
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Old 07-03-2008, 07:47 PM   #6
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Well someone already proved the rear axles can break with the stock turbo
I love youtube
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Old 07-03-2008, 08:03 PM   #7
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yes i broke one also.. im on Auto

i pulled my 1.63 on my 04 STi 100 percent rear
and 1.61 on 50,50 (Lock)


but putting the 100 percent rear doenst mean its all the power is gonna be on the rear..

i believe the torque split will always be 35 front and 65 rear for the 04 -05 STi setting on the 100 percent rear on the DCCD,


as for auto i think the center diff fluctuate so much looking for the best traction and gives 1 wheel more torque than the other 3 which in my theory what cuased my rear axle to break.

i launch at 50 50, it comes down to how you set your alignment up, tires, clutch controll, suspension, and you dont need launch control

you can break anything, if you really want to

plus the stock turbo has proven to be powerfull enough to take on some gt30r cars from a stand still
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Old 07-03-2008, 08:22 PM   #8
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read the paragraph in first post.... 3" inlet 8cm^2 fp green
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Old 07-03-2008, 08:29 PM   #9
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damn you gotta cut the 60' to something under 2.. its killin yaa
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Old 07-03-2008, 09:27 PM   #10
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The trap speeds indicate that the car is definitely not making the power it should. Did you do anything to cool off the stock tmic before any of the runs?
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Old 07-03-2008, 09:35 PM   #11
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popped the hood and used stock intercooler sprayer with windshield washer fluid in that reservoir.... thats all.
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Old 07-03-2008, 10:04 PM   #12
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I'm willing to bet you're slipping the clutch too fast. To hit a 2.2 60ft that is a pretty bad launch (no offense )

I'm a little confused with your build. You have the parts to make a very very fast car, such as the forged internals and a nice turbo but you skimped out on the intercooler and stock cat-back? You are leaving a huge amount of power on the table with those two parts! Especially sitting in a staging lane waiting to drag race, that stock sti top mount must be hating you! I'm willing to bet you'd pick up at least 30whp by going with something more efficent such as a fmic. And with a fmic you can run more boost safely and take advantage of those forged internals a bit more. Anyway, my mind is wondering so I'll finish with saying why the hell did you leave the grill in the back?
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Old 07-03-2008, 10:10 PM   #13
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Quote:
Originally Posted by OppositeLock View Post
The trap speeds indicate that the car is definitely not making the power it should. Did you do anything to cool off the stock tmic before any of the runs?
Ding ding ding. Forget the E.T. for now.

Where in the world is all the power? It should at least show somewhat in the trap
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Old 07-03-2008, 10:11 PM   #14
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Quote:
Originally Posted by REX8 View Post
Ding ding ding. Forget the E.T. for now.

Where in the world is all the power? It should at least show somewhat in the trap
unless he is consistantly shifting really early or really slow.
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Old 07-03-2008, 10:28 PM   #15
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Turn down the boost 1-2psi and try again. We have the same problem with my friend's STI @ the track untill we logge it and saw the ECU pulling some timing in the lower gears.
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Old 07-03-2008, 10:29 PM   #16
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Wow your traps are really low. You should get your car checked out.
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Old 07-03-2008, 11:02 PM   #17
tux121
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What do normal Stage 2 STi's trap then? I can only trap 102mph and that was just being lucky?

Oh yeah my cars missing 30wtq lmao
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Old 07-03-2008, 11:19 PM   #18
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Mine traps 103, 104 with a stock turbo and the usual stage 2 stuff. My ET fluctuates depending on my skill (luck) on any given night, but the traps tend to stay the same on any given night.

I recommend icing the intercooler (yeah, place, not throw, a bag of ice on it between runs.) Here in Florida, runnning on 85 degree night, it's pretty much needed. The sprayer is a lot more effective when the car is moving.
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Old 07-03-2008, 11:36 PM   #19
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Quote:
Originally Posted by k04sti View Post
Wow your traps are really low. You should get your car checked out.
i agree
even it you come off the line like its a stop light you should be trapping way more then that
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Old 07-03-2008, 11:48 PM   #20
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Even with a crappy launch you should be running MUCH better than that. With my little pansy 16g on a stock 2.0, I run better times and traps when I screw up my launch. Your shifting could use some practice .

Good luck though, with some practice you could see low 12s, high 11s
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Old 07-04-2008, 12:37 AM   #21
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i actually just found out there was a vid of my best run... heres the link to the youtube...

red c4 vette next to me... intake manifold, ported throttle body, headers, exhaust, intake, cammed... he redlit by .022 and i drove around him...

http://www.youtube.com/watch?v=QBRsK79YYy4
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Old 07-04-2008, 01:00 AM   #22
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what rpm are you shifting at?
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Old 07-04-2008, 02:33 AM   #23
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Something is definitely up, you should be trapping at least 110.

Also, you're only making 20mph on the back half, which somewhat rules out bad driving effecting the trap.

Likely culprit: 23psi + stock topmount.

As far as the ET goes... your driving needs work, and you need to get the tire pressure dialed to get some consistent launches.

Last edited by fujiillin; 07-04-2008 at 02:39 AM.
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Old 07-04-2008, 02:44 AM   #24
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I'm going to say the problem is in the launch. You should be pulling sub 2 second 60 ft times all night long. I can't tell you how to do it as I need to work on my launches as well, but I think that is the issue. Oh, don't miss any gears either!
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Old 07-04-2008, 03:37 AM   #25
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you have multiple problems, and the first and most important is that ur driving sucks.. If ur clutch was the problem u wouldnt be able to spin ur tires so its not the clutch its the way u drive.. Second even with ur bad driving, u should still be trapping alot faster than 102.. Like others have said u should at least be around 110 even with not good driving, but 102 IMO somethings wrong with the car, weather its because ur running such high boost on pump gas n ur pulling timing or u have a leak of some sort..

So there's a couple things ur going to have to address.. U can practice ur driving and get better but right now I'd worry about why ur trapping so slow.. Datalog the car n see if its pulling timing, if u can't take it to a different shop that tuned it n have em check it out to get a second opinion..
N btw u are leaving a good ~30whp on the table running that tiny stock topmount and STOCK exhaust, most likely more than 30whp.. if u did it right n change it to a FMIC n real catless exhaust from the turbo back I bet ud gain at least 30whp, that crap is restrictive as hell, especialy when u have an upgraded turbo..
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