Bog off the line
07-08-2003, 11:22 AM
#1
Bog off the line What would cause a slight bog off the line? When launching at about 2400 rpms( holding the brake and gas ) and then mashing the gas, I get this. It feels like max power is not being applied. After about 1 to 2 seconds there is a surge in power and then the car pulls hard through all gears.
07-08-2003, 11:53 PM
#3
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Re: Bog off the line I've got the same issue bro, except mine is an m6...and it happens to me anytime under 3K rpms. Sorry I don't have an answer to your question, but at least you're not the only person w/the issue.
07-09-2003, 01:31 AM
#4
Re: Bog off the line Try adjusting your Main VE table. I had no bog until I multiplied the table by 60% to help with a cold start issue I had. It helped the cold start but also gave me a bog off the line. I only adjusted up to 2100 RPM.
07-09-2003, 07:48 AM
#5
Re: Bog off the line Here is some info on my setup:
- 26x11.5x16 ET Streets
- HD built 4L60E
- 3800 TC
- 3.90:1 gears
- 383 stroker making about 430 rwhp
- Original programming by MMS;
Torque management removed and other changes via LS1Edit
I also disabled Abuse Mode; torque and timing reduction
- 26x11.5x16 ET Streets
- HD built 4L60E
- 3800 TC
- 3.90:1 gears
- 383 stroker making about 430 rwhp
- Original programming by MMS;
Torque management removed and other changes via LS1Edit
I also disabled Abuse Mode; torque and timing reduction
07-09-2003, 08:02 AM
#6
Re: Bog off the line I should also add is that it is not really like a bog, a dip in rpms. It is more like max power is not being applied. The rpms and mph increase moderately until about 4000ish rpms then the car takes off 
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07-11-2003, 10:41 AM
#9
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Re: Bog off the line the issue might be that your idling a lot when going through the staging lane, your tune is off and the more you idle the leaner your fuel trims are along with hotter intake and water temps.
You then launch and the PCM was attempting to solve the lean fuel trims and now at launch are too rich.
Long term fuel trims are acted on by the PCM every ten minutes so when you launch your PCM is really functioning as what the conditions were up to 10 minutes ago.
Also depending on how the torque management was set to when you launch the PCM could be backing timing down when TM kicks in so that is another function of PCM that needs to be tuned.
You then launch and the PCM was attempting to solve the lean fuel trims and now at launch are too rich.
Long term fuel trims are acted on by the PCM every ten minutes so when you launch your PCM is really functioning as what the conditions were up to 10 minutes ago.
Also depending on how the torque management was set to when you launch the PCM could be backing timing down when TM kicks in so that is another function of PCM that needs to be tuned.
