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Old 06-21-2008, 08:46 PM
   First time at the dragstrip with my GXP
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Location: Youngstown, Ohio
I took my GXP [auto] down the strip for the first time this weekend. Only mod is the GMPP intake. All three runs were with no powerbraking.

1) 14.593 @ 96.04 / 60': 2.41 / TC&ECS Off
2) 14.587 @ 96.03 / 60': 2.37 / Competition Mode
3) 14.606 @ 95.27 / 60': 2.39 / TC&ECS Off

The track is 1500ft above sealevel, so with NHRA altitutde corrections, the times are
1) 14.38 @ 97.41
2) 14.37 @ 97.40
3) 14.39 @ 96.63

I really need to work on my launches to lower my 60' time.
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Old 06-21-2008, 09:14 PM
  
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Originally Posted by Lithium Lotus View Post
I took my GXP [auto] down the strip for the first time this weekend. Only mod is the GMPP intake. All three runs were with no powerbraking.

1) 14.593 @ 96.04 / 60': 2.41 / TC&ECS Off
2) 14.587 @ 96.03 / 60': 2.37 / Competition Mode
3) 14.606 @ 95.27 / 60': 2.39 / TC&ECS Off

The track is 1500ft above sealevel, so with NHRA altitutde corrections, the times are
1) 14.38 @ 97.41
2) 14.37 @ 97.40
3) 14.39 @ 96.63

I really need to work on my launches to lower my 60' time.

Your mph shows that your power is off.
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Old 06-21-2008, 09:17 PM
  
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That's still quick for a car that can get 30mpg. Is comp mode TC & ECS on and it was your fastest time? Were you spinning the tires too much slowing down your 60' times?
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Old 06-21-2008, 09:17 PM
  
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Your mph shows that your power is off.

Can you elaborate?

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That's still quick for a car that can get 30mpg. Is comp mode TC & ECS on and it was your fastest time? Were you spinning the tires too much slowing down your 60' times?

When wearing a helmet and lined up next to a loud V8, it's hard to tell if I'm spinning my tires or not. I'm sure that's what is causing my high 60' though. It just doesn't feel like I'm spinning them off the line.
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Old 06-22-2008, 09:37 PM
  
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[quote=Lithium Lotus;709973]Can you elaborate?

Please don't take this the wrong way, I am trying to be constructive, there is something happening that is not right. Your MPH should be a bit higher.

You are right, your 60's are hurting your ET, but, something else is hurting the MPH. I hope you are turning off both ESC and TC, they will both interfere with a clean run and mph. I have made about 20 passes with the GXP and logged several of those runs and only saw the interference when reviewing the logs, I would not have known from the SOP.

The DashHawk is a nice tool and if you log RPM, real and actual throttle position, boost and real MAF you will see how the car is running. I hope you get your sixties under 2.0 and get the ET under 14.0. At our ET level, you might see your ET improve twice your reduction in 60' time. I believe you will see a 98-99 mph at your altitude if everything is right.

Good Luck
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Old 06-23-2008, 10:49 AM
  
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That's the thing. When I'm wearing a helmet and have a loud v8 next to me at the line, I can't hear if my tires spin. I had my TC/ESC off for those two runs marked, but somehow I had my fastest time in competition mode.

When I made all three runs, I believe the competition mode was run during the coolest part of the day, in the low-70's. I know the other two runs where around noon, not the greatest times to make a pass.
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Old 06-23-2008, 01:31 PM
  
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Nice times. Enter your times on this web site. I ran a 14.03 last September. Track elevation 325ft. My slip is posted on the site.

Fast Pontiac Solstices 1/4 Mile 0-60 Drag Racing - DragTimes.com
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Old 06-23-2008, 10:29 PM
  
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Originally Posted by Lithium Lotus View Post
That's the thing. When I'm wearing a helmet and have a loud v8 next to me at the line, I can't hear if my tires spin. I had my TC/ESC off for those two runs marked, but somehow I had my fastest time in competition mode.

When I made all three runs, I believe the competition mode was run during the coolest part of the day, in the low-70's. I know the other two runs where around noon, not the greatest times to make a pass.

I have a stick and in the competition mode it would pull the throttle during the the launch. I also saw a big notch where it would pull boost as the car was about 60' out. I have gven up with the comp mode for both auto x and the strip.
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Old 06-23-2008, 11:28 PM
  
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Originally Posted by Jack B View Post
I have a stick and in the competition mode it would pull the throttle during the the launch. I also saw a big notch where it would pull boost as the car was about 60' out. I have gven up with the comp mode for both auto x and the strip.
Good info to know, thanks.
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Old 06-24-2008, 05:45 AM
  
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I have a stick and in the competition mode it would pull the throttle during the the launch. I also saw a big notch where it would pull boost as the car was about 60' out. I have gven up with the comp mode for both auto x and the strip.

So do you turn of TC completely?
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Old 06-24-2008, 09:52 PM
  
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So do you turn of TC completely?

Hold it for ten seconds, turn it all off!!
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Old 06-25-2008, 06:03 AM
  
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Hold it for ten seconds, turn it all off!!
I knew that, I was inquiring if you did your runs with it off completely?
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Old 06-25-2008, 05:37 PM
  
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If it matters any, I do remember hitting 17psi for a split second on one run.
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Old 06-25-2008, 09:16 PM
  
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I knew that, I was inquiring if you did your runs with it off completely?

IMHO you have to have them all off when you hit the limits of performance. I could get no consistency at auto X or drag strip with either TC or Comp mode on. The only time I would use either is on a slippery auto X course.
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Old 07-01-2008, 09:34 AM
  
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You did better than I did. My first trip to the track got me a best of 14.6 at 96.
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Old 07-01-2008, 09:53 AM
  
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IMHO you have to have them all off when you hit the limits of performance. I could get no consistency at auto X or drag strip with either TC or Comp mode on. The only time I would use either is on a slippery auto X course.

I'll turn mine off completely then on the next run.
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