Bad quarter mile times, with a lot of mods
05-12-2004, 07:51 AM
#1
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Bad quarter mile times, with a lot of mods
Ok, I went to Atco speedway in NJ last night. I was getting horrible times, best was 14.1 worst was 14.6. I miss shifted every run. There was another STI there who was pulling 14's having trouble launching also. I am finding launching at the track is different from launching on the street. On the street I turn off auto DCCD and put it all the way to the rear. I get sick launches without bogging on the street. I beat a stock evo by about 4 or 5 car lengths. I also beat a stock M3 about 4 or 5 car lengths. But on the track its like I don't know how to shift any more. I also have trouble launching. Does anyone have any tips for launching on the track? Also is power shifting good(Hitting clutch while it is still floored and banging the gears)? Has anyone else had trouble on the track but done much better on the street. Anyone else having trouble getting used to the shifter?
List of mods are: Invidia titanium TBE. XXTuning Headers. Turbosmart bov, Perrin air filter in stock air box., Perrin Oil Catch Can, Tein Springs, Rear sway bar, Perrin pulley, thats all I can think of for right now.
List of mods are: Invidia titanium TBE. XXTuning Headers. Turbosmart bov, Perrin air filter in stock air box., Perrin Oil Catch Can, Tein Springs, Rear sway bar, Perrin pulley, thats all I can think of for right now.
05-13-2004, 12:11 AM
#4
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Car Info: 02 Impreza WRX sedan
Please omit street racing references on this board, thanks.
What was your trap speed? This gives us an idea if your car is making the power that it should based on the mods you have.
I launch my rex by revving to approximately 5000 RPM, leaving on the last yellow, slipping the clutch for about a second and a half until the car moves out of the staging beams, then ease into full throttle while letting the clutch out as fast as I can without bringing the revs down. I can usually get 1.8 to 1.9 second 60 ft times and can turn 13.80s to 13.90s on a cool evening (65 F degrees).
You're going to have to work on your shifting, too. That's going to cost you several tenths per missed shift.
--
0==WW==0
"…axles of evil…" - george w. bush
What was your trap speed? This gives us an idea if your car is making the power that it should based on the mods you have.
I launch my rex by revving to approximately 5000 RPM, leaving on the last yellow, slipping the clutch for about a second and a half until the car moves out of the staging beams, then ease into full throttle while letting the clutch out as fast as I can without bringing the revs down. I can usually get 1.8 to 1.9 second 60 ft times and can turn 13.80s to 13.90s on a cool evening (65 F degrees).
You're going to have to work on your shifting, too. That's going to cost you several tenths per missed shift.
--
0==WW==0
"…axles of evil…" - george w. bush
05-13-2004, 06:20 AM
#5
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Wingless Wonder, I have a Couple of questions for you...When you say the last yellow do you mean the top most before lock on the dccd? Also how do you slip the clutch? How are people who say they are pulling 13.1's bone stock doing it? Are they lieing? I am going to the track again tonight so I will try what you have told me.
05-13-2004, 08:06 AM
#6
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Car Info: 02 Impreza WRX sedan
Origami posted by greysave
When you say the last yellow do you mean the top most before lock on the dccd? Also how do you slip the clutch? How are people who say they are pulling 13.1's bone stock doing it? Are they lieing?
When you say the last yellow do you mean the top most before lock on the dccd? Also how do you slip the clutch? How are people who say they are pulling 13.1's bone stock doing it? Are they lieing?
I slip the clutch as I stated in my previous post. Let it out too fast and the car will bog for a couple of seconds - too slowly and the clutch will burn up (I can smell the clutch material in the cabin within seconds). It takes practice but a good launch will be reflected in your 60 ft times.
Locally, guys with stock STis are pulling low-13 second E.T.s, but lightly modified STis are pulling in the 12.50s to 12.80s and trapping up to 109 MPH.
--
0==WW==0
"…axles of evil…" - george w. bush
05-22-2004, 10:17 PM
#8
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Originally Posted by Wingless Wonder
Please omit street racing references on this board, thanks.
What was your trap speed? This gives us an idea if your car is making the power that it should based on the mods you have.
I launch my rex by revving to approximately 5000 RPM, leaving on the last yellow, slipping the clutch for about a second and a half until the car moves out of the staging beams, then ease into full throttle while letting the clutch out as fast as I can without bringing the revs down. I can usually get 1.8 to 1.9 second 60 ft times and can turn 13.80s to 13.90s on a cool evening (65 F degrees).
You're going to have to work on your shifting, too. That's going to cost you several tenths per missed shift.
--
0==WW==0
"…axles of evil…" - george w. bush
What was your trap speed? This gives us an idea if your car is making the power that it should based on the mods you have.
I launch my rex by revving to approximately 5000 RPM, leaving on the last yellow, slipping the clutch for about a second and a half until the car moves out of the staging beams, then ease into full throttle while letting the clutch out as fast as I can without bringing the revs down. I can usually get 1.8 to 1.9 second 60 ft times and can turn 13.80s to 13.90s on a cool evening (65 F degrees).
You're going to have to work on your shifting, too. That's going to cost you several tenths per missed shift.
--
0==WW==0
"…axles of evil…" - george w. bush
05-23-2004, 11:26 AM
#10
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Car Info: 02 Impreza WRX sedan
Origami posted by greysave
My trap speeds are very slow. They are only at 101. I think I am doing something wrong. What RPM are you shifting at?
My trap speeds are very slow. They are only at 101. I think I am doing something wrong. What RPM are you shifting at?
I suspect that your car could benefit greatly from a reflash from Cobb Tuning or one of the EcuTek vendor/tuners (should be available soon). A reflash even on a stock WRX or STi makes an big noticeable difference.
My shift points won't be of much help to you because your engine has a different power curve than an EJ20 and your 6MT has much closer gear ratios. I launch at 5000 rpm, shift from 1st to 2nd gear at 7000 rpm (because of the very wide ratio spread), and shift at 6500 rpm for the remainder of the gears, going through the traps in 4th.
--
0==WW==0
"…axles of evil…" - george w. bush
09-26-2004, 11:25 PM
#13
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yeah, you should be running quicker and faster. My best run on my stock STI was 13.30 @ 100.68 mph...on a 78F, humid night in hawaii. Try to launch at 5k, shift just before redline, around 6800 rpm....if you hit redline the car slows down so make sure to shift right before it. ou should be using 1st thru 5th in a quarter mile. A quick way to reset the ecu ive heard was to disconnect the negative terminal on your battery.... then reconnect it after the car has cooled down.
09-29-2004, 07:07 PM
#14
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yeah with stock ecu i heard its a good idea to reset the ECU when you put on mods the give it 200 miles about to relearn.
if your not getting good launch try putting back on your stock sway bar and see what you do. sway bars dont help launching most awd drag cars dont have them at all.
if your not getting good launch try putting back on your stock sway bar and see what you do. sway bars dont help launching most awd drag cars dont have them at all.
09-30-2004, 07:49 AM
#15
First thing to remember is to be calm. Most people get pretty nervous at the tree. Being calm is very important. Take some deep breaths, and concentrate. Listen to your motor, and relax. I bet you will have better times and no more missed shifts. I too have a Wrx. The best i have run is a 13.6. This came from slipping the clutch at 5k(took a lot of practice).I have a Cobb stage 2. Some say with the Cobb 2 they are hitting 13.2 i am still trying. As for the techniqes for the STi i have no idea. I have heard that you need to use the ic sprayer as you stage. This will help cool the ic a little. Check you tire pressures as well. You would be supprise what tire pressure can do for you. But i would say stop missing shifts first. good luck!
As for the techniqes for the STi i have no idea. I have heard that you need to use the ic sprayer as you stage. This will help cool the ic a little. Check you tire pressures as well. You would be supprise what tire pressure can do for you. But i would say stop missing shifts first. good luck!
Last edited by wrx10404; 09-30-2004 at 07:52 AM.
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