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-   -   A6 shifting way before redline - even in PTM5? (https://www.camaro5.com/forums/showthread.php?t=306566)

roSSco 07-09-2013 07:58 AM

A6 shifting way before redline - even in PTM5?
 
I recently went to the dragstrip in my ZL1 and it was quite disappointing. My best time was 12.61 with a 1.8 60' Two other runs were 12.8x MPH was 111.

I had a dash cam running for 2 of the runs and it sure sounds like it was shifting way early on the 1-2 and 2-3 shifts.

I admit I wasn't watching the tach, but I was in PTM5 and Sport mode for sure.

I have worn out Google and the search function here, but was wondering if anyone was aware of this issue.

I have not made any follow up runs yet to watch the tach during a repeat, but am pretty sure this is the case.

Watch one of the videos and let me know what you think. (right click on links, save)

http://www.anotherls1.com/ZL1/1373080689921.3gp

http://www.anotherls1.com/ZL1/1373081842122.3gp

2012-1822 07-09-2013 10:16 AM

I thought you Autos didn't have PTM.

1MtnGoat 07-09-2013 10:23 AM

Quote:

Originally Posted by 2012-1822 (Post 6766721)
I thought you Autos didn't have PTM.

It's the convertibles that don't. Autos do.

DangerZL1 07-09-2013 10:51 AM

Hard to tell from watching your video. I'd do a run in your favorite testing area and see where it shifts. I believe there have been some posts saying the auto shifts before redline, but redline may not be the optimal shift point for the auto.

CAM....ZL1 07-09-2013 11:32 AM

I can certainly tell you that at WOT the auto will and does shift at 5900 rpms.

Scott@Bjorn3D 07-09-2013 11:35 AM

You have to remember also the tach is not moving as fast as the engine is. So it may be 300-500 rpm behind the engine at WOT.

Sven59 07-09-2013 11:35 AM

In mode 5 the car still controlls some functions, try with all nannies off and see if it does it.

CAM....ZL1 07-09-2013 12:00 PM

Quote:

Originally Posted by Scott@Bjorn3D (Post 6767037)
You have to remember also the tach is not moving as fast as the engine is. So it may be 300-500 rpm behind the engine at WOT.

This is also correct info. same thing a good tuner will tell you. about 500 is a good measurement.

roSSco 07-09-2013 01:11 PM

I saw an article that said the transmission shifts at 5800 in Drive and 6000 in Sport mode.

Found the article.
http://www.gmhightechperformance.com...1/viewall.html

Sven59 07-09-2013 01:30 PM

Quote:

Originally Posted by roSSco (Post 6767369)
I saw an article that said the transmission shifts at 5800 in Drive and 6000 in Sport mode.

Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

Interesting, does anyone know if you turn the nannies off this still applies?

JDP Sales 07-09-2013 01:54 PM

Quote:

Originally Posted by Scott@Bjorn3D (Post 6767037)
You have to remember also the tach is not moving as fast as the engine is. So it may be 300-500 rpm behind the engine at WOT.

This is true. The Tachometer will lag slightly behind.

Best regards,

Tyler
888-308-6007

roSSco 07-11-2013 07:57 AM

I did the DA calculations and discovered it was around 3000' which translates into a 12.14 @ 114.9. Not too far off the mark for a stock ZL1.

What a relief! :biggrin:


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