Acceleration Problem - Autocross
Thread Starter
Drifting
Joined: Apr 2010
Posts: 1,578
Likes: 23
From: Waldorf, MD
Acceleration Problem - Autocross
Having a problem with acceleration at autocross right at coming off the line. 2015 Z06, fully loaded, Z07, CCB, no other issues. Problem is waiting for the "Go" signal then hitting the gas and letting the clutch out - engine almost dies and has no power then starts spooling up and takes off. Its got to be costing me a couple of seconds on my track passes. Rest of the track time is fine except for the launch. Any thoughts?
Thanks.
Thanks.
Last edited by Foxer55; Sep 18, 2016 at 07:53 PM.
Pro
Joined: Sep 2015
Posts: 514
Likes: 38
From: California
Having a problem with acceleration at autocross right at coming off the line. 2015 Z06, fully loaded, Z07, CCB, no other issues. Problem is waiting for the "Go" signal then hitting the gas and letting the clutch out - engine almost dies and has no power then starts spooling up and takes off. Its got to be costing me a couple of seconds on my track passes. Rest of the track time is fine except for the launch. Any thoughts?
Thanks.
Thanks.
Thread Starter
Drifting
Joined: Apr 2010
Posts: 1,578
Likes: 23
From: Waldorf, MD
Melting Slicks
Joined: Apr 2016
Posts: 3,169
Likes: 861
From: Naples FL
Give it a blip or two to get the revs up and hold them at 3-4K. Then smoothly release the clutch. If you try to release the clutch while pressing the throttle from idle, it'll bog. Get your revs up first and you'll get a nice launch or smoke the tires if you overshoot.
You can get a sense from the start of my 4 runs in this video. This was my first autocross with the Z so there was a learning curve.
https://youtu.be/yBwswKFDKcg
You can get a sense from the start of my 4 runs in this video. This was my first autocross with the Z so there was a learning curve.
https://youtu.be/yBwswKFDKcg
Last edited by spearfish25; Sep 18, 2016 at 09:42 PM.
Pro
Joined: Sep 2015
Posts: 514
Likes: 38
From: California
Originally Posted by Foxer55
I'm in Track 2 mode, just jumping the clutch.
Last edited by SharkgrayVetteZ06; Sep 18, 2016 at 10:54 PM.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,821
From: Charlotte, NC (formerly Endicott, NY)
I autocrossed mine in July. I couldn't use launch control since the car was facing down hill toward the start line. I just started the car like I did all my other Vettes. Bring rpms up to about 3000 and when I decide to go let the clutch out while moving down on the gas. The car would bog slightly but would then immediately launch toward the first turn. I used Track Mode Sport 1 and Sport 2.
I got Overall FTD with this run with a little drizzle occurring.
This was the last run of the day when we were doing fun runs. I had passengers with me on all the runs.
Bill
I got Overall FTD with this run with a little drizzle occurring.
This was the last run of the day when we were doing fun runs. I had passengers with me on all the runs.
Bill
Thread Starter
Drifting
Joined: Apr 2010
Posts: 1,578
Likes: 23
From: Waldorf, MD
Give it a blip or two to get the revs up and hold them at 3-4K. Then smoothly release the clutch. If you try to release the clutch while pressing the throttle from idle, it'll bog. Get your revs up first and you'll get a nice launch or smoke the tires if you overshoot.
You can get a sense from the start of my 4 runs in this video. This was my first autocross with the Z so there was a learning curve.
https://youtu.be/yBwswKFDKcg
You can get a sense from the start of my 4 runs in this video. This was my first autocross with the Z so there was a learning curve.
https://youtu.be/yBwswKFDKcg
Thread Starter
Drifting
Joined: Apr 2010
Posts: 1,578
Likes: 23
From: Waldorf, MD
I autocrossed mine in July. I couldn't use launch control since the car was facing down hill toward the start line. I just started the car like I did all my other Vettes. Bring rpms up to about 3000 and when I decide to go let the clutch out while moving down on the gas. The car would bog slightly but would then immediately launch toward the first turn. I used Track Mode Sport 1 and Sport 2.
I got Overall FTD with this run with a little drizzle occurring.
https://www.youtube.com/watch?v=pXEjIDVX2J4
This was the last run of the day when we were doing fun runs. I had passengers with me on all the runs.
https://www.youtube.com/watch?v=ukobIba3zUw
Bill
I got Overall FTD with this run with a little drizzle occurring.
https://www.youtube.com/watch?v=pXEjIDVX2J4
This was the last run of the day when we were doing fun runs. I had passengers with me on all the runs.
https://www.youtube.com/watch?v=ukobIba3zUw
Bill
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