Torque mgmt timing during coastdown? - Pontiac G8 Forum: G8 Forums - G8Board.com
 
LinkBack Thread Tools
post #1 of 20 (permalink) Old 11-09-2012, 09:10 AM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Torque mgmt timing during coastdown?

With my recent cam install, I have found that my car uses the TqMgt timing during closed throttle coastdown at low speeds, like under 25. If i keep the TqMgt reasonable like 0* the timing oscillates between 0 and something like 20* while coasting and then the car will surge when I come to a stop and it downshifts into 1st. If I increase it to 8*, then the timing is 8* during coastdown and no surging but of course the shifts are harsh and tires bark.

I do have the Idle air dialed in and it doesn't surge on idle, so that's not the issue

Why does it use TqMgt timing and not coastdown timing table? In my logs, the timing pulled due to TqMgt matches what is occurring and I have experimented by changing TqMgt so I definitely know that is what is happening. But why?

Sent from my DROID RAZR using AutoGuide.Com Free App

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
Sponsored Links
Advertisement
 
post #2 of 20 (permalink) Old 11-09-2012, 09:42 AM
Super Moderator
 
DRUMSBH's Avatar
 
Join Date: Aug 2010
Location: SE MN
Posts: 2,441
try shooting G8-4-Speed a PM, he fixed mine.

08' Pontiac G8 GT PBM
11.323@121.66 Rock Falls Raceway 10-11-14
N/A RCR car.
DRUMSBH is offline  
post #3 of 20 (permalink) Old 11-09-2012, 10:37 AM
HPT Pro Tuner
 
bluegoat06's Avatar
 
Join Date: Mar 2008
Location: Rancho Santa Margarita, CA
Posts: 3,815
That's interesting Jeremy , do you have a log ?

Can you post a print screen with your Trans TM settings ? or post your tune, or email me your tune. ?

Mine was doing that after the verter install, but it was also affecting my initial WOT punch in any gear. Tqmgt was closing down my TB upon initial WOT, fairly ****ty feeling, especially after doing a mod, i thought something was messed up

2012 Mustang GT, M6, 3.73's, Base/Brembo Package
3" H Pipe/Stock cats, Res!/3" pipes, Magnaflow 14419's AB, UPR Catch Can
HPTuners Pro v2.25 | Street Tuned

2010 Silverado 1500 LT Crew 5.3L
Magnaflow 14619, K&N Drop Filter, Airraid MIT, UPR Catch Can, American Outlaw Deputy 17x9, BFG 285/70/17 TKO, Bilstein 5100's
Hptuners 2.24 Pro / Street Tuned
bluegoat06 is offline  
post #4 of 20 (permalink) Old 11-09-2012, 12:39 PM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Email sent.

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #5 of 20 (permalink) Old 11-09-2012, 12:43 PM
Senior Member
 
blubyya's Avatar
 
Join Date: May 2011
Location: buford, ga
Posts: 320
Post results, I'd like to see what the reason is too. I believe I might have something similar.

2008 gt, lsa 9psi, meth, rcr blower cam, Lingenfelter ls3 heads, ls7 maf, crawford tb, kooks headers &mid pipe magnaflow mufflers, spohn toe & lowers
10.38 130mph 1.56 60ft PB
11.29 122pmh 1.67 60ft (old n/a setup)
blubyya is offline  
post #6 of 20 (permalink) Old 11-09-2012, 04:57 PM
HPT Pro Tuner
 
bluegoat06's Avatar
 
Join Date: Mar 2008
Location: Rancho Santa Margarita, CA
Posts: 3,815
Jeremy, this is something different than what i had. Your TB is not closing like mine, your engine timing is just bouncing, just after tqmgt kicks in, i guess from CT tqmgt because your tps remains shut constant.

2012 Mustang GT, M6, 3.73's, Base/Brembo Package
3" H Pipe/Stock cats, Res!/3" pipes, Magnaflow 14419's AB, UPR Catch Can
HPTuners Pro v2.25 | Street Tuned

2010 Silverado 1500 LT Crew 5.3L
Magnaflow 14619, K&N Drop Filter, Airraid MIT, UPR Catch Can, American Outlaw Deputy 17x9, BFG 285/70/17 TKO, Bilstein 5100's
Hptuners 2.24 Pro / Street Tuned
bluegoat06 is offline  
post #7 of 20 (permalink) Old 11-09-2012, 05:42 PM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
I'll test it on the way home by disabling all CT Downshift TqMgt

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #8 of 20 (permalink) Old 11-09-2012, 06:08 PM
HPT Pro Tuner
 
bluegoat06's Avatar
 
Join Date: Mar 2008
Location: Rancho Santa Margarita, CA
Posts: 3,815
Disable the master CT tqmgt and see what happens.

2012 Mustang GT, M6, 3.73's, Base/Brembo Package
3" H Pipe/Stock cats, Res!/3" pipes, Magnaflow 14419's AB, UPR Catch Can
HPTuners Pro v2.25 | Street Tuned

2010 Silverado 1500 LT Crew 5.3L
Magnaflow 14619, K&N Drop Filter, Airraid MIT, UPR Catch Can, American Outlaw Deputy 17x9, BFG 285/70/17 TKO, Bilstein 5100's
Hptuners 2.24 Pro / Street Tuned
bluegoat06 is offline  
post #9 of 20 (permalink) Old 11-09-2012, 06:18 PM
Senior Member
 
gtp6515's Avatar
 
Join Date: Nov 2010
Location: Farmington, Mn
Posts: 1,661
Subscribed...mine is rough on 2-1 as well.


219/223 .625 .625 112 "Little Lunati", 11.78 @ 119, 440/421 dynojet, Crawford heads, tb, intake. Kooks 1 3/4 lts and solo Mach balance catted with added Solo resonators, VCM, 3.45's, stock stall.
gtp6515 is offline  
post #10 of 20 (permalink) Old 11-09-2012, 06:30 PM
Super Moderator
 
DRUMSBH's Avatar
 
Join Date: Aug 2010
Location: SE MN
Posts: 2,441
Quote:
Originally Posted by gtp6515 View Post
Subscribed...mine is rough on 2-1 as well.
mines fine now... didnt you have Rick fix it? No surge cruising anymore as well.

08' Pontiac G8 GT PBM
11.323@121.66 Rock Falls Raceway 10-11-14
N/A RCR car.
DRUMSBH is offline  
post #11 of 20 (permalink) Old 11-09-2012, 07:51 PM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Disabling CT had no effect. Tried Sport shift and it was somewhat better. I'll send a log tonight

Sent from my DROID RAZR using AutoGuide.Com Free App

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #12 of 20 (permalink) Old 11-10-2012, 01:27 AM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Could have something to do with the torque follower tables. I haven't changed these from stock yet.

Here's a quick log from tonight with the CT TqMgt disabled.
Attached Files
File Type: hpl v103 ct test.hpl (720.0 KB, 3 views)

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #13 of 20 (permalink) Old 11-11-2012, 02:16 PM
HPT Pro Tuner
 
bluegoat06's Avatar
 
Join Date: Mar 2008
Location: Rancho Santa Margarita, CA
Posts: 3,815
In the logs she seems to do this during the 4-3 downshift, with no throttle. it's interesting that the master switch didn't do anything. If it's not CT downshift, because the master TM switch didn't do anything, then perhaps it'll be flare tgmt ?
re-enable the CT tqmgt master, and set the flare tqmgt downshift to none, dang stupid trans TM parameters we have , hope you get it resolved.

2012 Mustang GT, M6, 3.73's, Base/Brembo Package
3" H Pipe/Stock cats, Res!/3" pipes, Magnaflow 14419's AB, UPR Catch Can
HPTuners Pro v2.25 | Street Tuned

2010 Silverado 1500 LT Crew 5.3L
Magnaflow 14619, K&N Drop Filter, Airraid MIT, UPR Catch Can, American Outlaw Deputy 17x9, BFG 285/70/17 TKO, Bilstein 5100's
Hptuners 2.24 Pro / Street Tuned
bluegoat06 is offline  
post #14 of 20 (permalink) Old 11-11-2012, 10:31 PM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Thanks Dario. Ill try tomorrow.

Sent from my DROID RAZR using AutoGuide.Com Free App

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #15 of 20 (permalink) Old 11-13-2012, 08:19 AM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Looked at the tune again last night and realized I hadn't disabled the Master CT TqMgt switch. Tried that and it seems to have solved the issue.

Here's a log from this morning.
Attached Files
File Type: hpl v105 CT test.hpl (974.2 KB, 1 views)

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #16 of 20 (permalink) Old 11-13-2012, 11:07 AM
HPT Pro Tuner
 
bluegoat06's Avatar
 
Join Date: Mar 2008
Location: Rancho Santa Margarita, CA
Posts: 3,815
, glad to see you nailed this down Jeremy.
Now that you have figured the issue is the CT Downshift TM, you could try to re-enable the master switch, and disabled the tip in/flare CT downshift TM (set it to none) and see if that still prevent the CT TM from causing the issue. if that doesn't do it, then put this switches back to how you have them now, and disabled the CT downshift master switch again, it's better to use the smaller TM switches first, if that doesn't do anything, then the master will be fine. don't know why would we have TM in CT, but oh well, dang stupid trans TM parameters we have , i'm sure some of them are there for a reason.

Have fun.

2012 Mustang GT, M6, 3.73's, Base/Brembo Package
3" H Pipe/Stock cats, Res!/3" pipes, Magnaflow 14419's AB, UPR Catch Can
HPTuners Pro v2.25 | Street Tuned

2010 Silverado 1500 LT Crew 5.3L
Magnaflow 14619, K&N Drop Filter, Airraid MIT, UPR Catch Can, American Outlaw Deputy 17x9, BFG 285/70/17 TKO, Bilstein 5100's
Hptuners 2.24 Pro / Street Tuned
bluegoat06 is offline  
post #17 of 20 (permalink) Old 11-13-2012, 09:21 PM
Senior Member
 
gtp6515's Avatar
 
Join Date: Nov 2010
Location: Farmington, Mn
Posts: 1,661
I was hoping this would help me as well. My ct downshift is already disabled.


219/223 .625 .625 112 "Little Lunati", 11.78 @ 119, 440/421 dynojet, Crawford heads, tb, intake. Kooks 1 3/4 lts and solo Mach balance catted with added Solo resonators, VCM, 3.45's, stock stall.
gtp6515 is offline  
post #18 of 20 (permalink) Old 11-13-2012, 09:25 PM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Yeah next is determine why DOD is not engaging...

Sent from my DROID RAZR using AutoGuide.Com Free App

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #19 of 20 (permalink) Old 11-21-2012, 07:11 PM Thread Starter
Senior Member
 
blkscooby's Avatar
 
Join Date: Aug 2010
Location: Gilbert, AZ
Posts: 547
Bluegoat informed me that DOD doesnt function if COT is disabled.

Sent from my DROID RAZR using AutoGuide.Com Free App

NEW- 2009 PSM GT- Vararam/ RCR 219/227 cam/ Kooks 1 7/8" LT/ 3" exhaust/ 3200 Yank/ 3.45 gears/ HSW Nitrous/ HPT self-tune

SOLD- 2008 LR G8 GT /
Intake / HPT self-tune / E85 / 160* stat / Kooks mids / Dynomax ST axlebacks / Xpipe / 219/233 Comp Cam

blkscooby is offline  
post #20 of 20 (permalink) Old 11-21-2012, 07:50 PM
HPT Pro Tuner
 
bluegoat06's Avatar
 
Join Date: Mar 2008
Location: Rancho Santa Margarita, CA
Posts: 3,815
Enjoy

2012 Mustang GT, M6, 3.73's, Base/Brembo Package
3" H Pipe/Stock cats, Res!/3" pipes, Magnaflow 14419's AB, UPR Catch Can
HPTuners Pro v2.25 | Street Tuned

2010 Silverado 1500 LT Crew 5.3L
Magnaflow 14619, K&N Drop Filter, Airraid MIT, UPR Catch Can, American Outlaw Deputy 17x9, BFG 285/70/17 TKO, Bilstein 5100's
Hptuners 2.24 Pro / Street Tuned
bluegoat06 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac G8 Forum: G8 Forums - G8Board.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome