01-23-2013, 05:19 PM | #1 |
RPM stutter in 3rd
So this is a little bit delayed, but I had my 2011 L99 professionally tuned about a year ago, and have been 99.5% satistfied with the results. My .5% comes from an almost unnoticeable RPM "stutter," and only in 3rd. It only happens at 70%+ throttle, and only for an instant before resuming normal output and acceleration.
I don't track the car, so it's not losing me any races, but it's finally bothering me enough to dive into it. I thought it was trans torque management, and since I have a copy of HPT myself, went as far as tuning all my trans settings back to stock. The issue is still there, so it must be in the engine torque management. Any ideas on where to look? The comparison feature of HPT - comparing my tune to a stock tune - has waaaaay too many changes for me to figure it out by process of elimination, I'm afraid. I'll try to get a scan of it happening and post it here. Stand by!
__________________
|
|
01-24-2013, 11:04 AM | #2 | |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,218
|
Quote:
Full list of Mods Please.
__________________
www.jannettyracing.com
Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
|
01-24-2013, 11:20 AM | #3 |
ARH 1 7/8" Longtube Headers with gutted cats
Vararam Intake (tune model) Dyno Tuned I can post my HPT file if it might help. It snowed last night so i wasn't so worried about getting the scan i promised... might try today though
__________________
|
|
01-24-2013, 11:32 AM | #4 |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,218
|
TR6 Plugs?
__________________
www.jannettyracing.com
Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
01-24-2013, 11:41 AM | #5 |
__________________
|
|
01-24-2013, 01:02 PM | #6 |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,218
|
__________________
www.jannettyracing.com
Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
01-24-2013, 02:32 PM | #7 |
Thanks Ted! Here's my HPT file if you or anyone else feels like having a look at my tune.
__________________
|
|
|
|
Thread Tools | |
|
|