torgue management???????
08-25-2004, 09:52 PM
#1
11 Second Club
Thread Starter
Join Date: Aug 2004
Location: minneapolis,mn
Posts: 891
Likes: 0
Received 0 Likes
on
0 Posts
torgue management??????? I have a 99 gmc 5.3 just put new tranny and stock converter in it has less low end than before im told its probobly the torque management and too tight of a converter has anyone ever heard this my freind has ls1edit but i dont have a vin coder or the money right now for one he also says its hard to get rid of the torque management is this the problem or the converter???????
08-25-2004, 10:04 PM
#2
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,605
Likes: 0
Received 6 Likes
on
6 Posts
Well, if you went from a performance converter to a
stocker you would definitely take a hit in off-the-line
acceleration. What was there before?
It's not hard to get rid of TM. There are plenty of other
things those 5.3 trucks seem to want fixed in the way
of timing "management" but it's all doable with a little
work and understanding.
Go to www.hptuners.com forums, and read this:
http://www.hptuners.com/forum/YaBB.p...num=1093311511
Torque management would only be dropping out power
on the shifts, by the way; only cars with electronic
throttles limit engine power under other conditions
with engine TM.
You might could live with the stock converter if you
had decent shift points and shift action programmed.
But the combo of tight stock stall and a very lame
2-1 kickdown profile leaves most LS-1 / GenIII GM
vehicles sucking wind on the street. Plus the stock
truck tranny program allows it to take up to 3/4 sec
to shift.
Sieze the power, dude....
stocker you would definitely take a hit in off-the-line
acceleration. What was there before?
It's not hard to get rid of TM. There are plenty of other
things those 5.3 trucks seem to want fixed in the way
of timing "management" but it's all doable with a little
work and understanding.
Go to www.hptuners.com forums, and read this:
http://www.hptuners.com/forum/YaBB.p...num=1093311511
Torque management would only be dropping out power
on the shifts, by the way; only cars with electronic
throttles limit engine power under other conditions
with engine TM.
You might could live with the stock converter if you
had decent shift points and shift action programmed.
But the combo of tight stock stall and a very lame
2-1 kickdown profile leaves most LS-1 / GenIII GM
vehicles sucking wind on the street. Plus the stock
truck tranny program allows it to take up to 3/4 sec
to shift.
Sieze the power, dude....
08-25-2004, 10:14 PM
#3
11 Second Club
Thread Starter
Join Date: Aug 2004
Location: minneapolis,mn
Posts: 891
Likes: 0
Received 0 Likes
on
0 Posts
i had a stock converter in it went to a trans tech ls1 race tranny shifts great just no take off till 2200 rpms trans points have been raised 3-4 mph through entire 1-4 kickdown seems to be working great just no low end power think a looser converter would help or no thinking about switching cams too
08-26-2004, 07:58 AM
#4
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,605
Likes: 0
Received 6 Likes
on
6 Posts
A converter really woke up the low end on my car.
Slide you up onto the fat part of the torque curve.
You probably want to think out the cam & converter
as a combo. Why two trannies and (presumably)
identical converters would change low end torque,
eludes me. But I wouldn't be surprised if something
during the install got messed up (like, for example,
the crank position sensor got hit and the engine
management is running without it at reduced power).
Or some signal out of the trans is putting PCM at a
wierd place, causing an abuse mode trigger. Or a
vacuum leak. Or.... So many little things that could
go wrong, got to get inside its head to figure out.
It may take days or even weeks for some of these
kind of things to manifest as SES codes but you
probably ought to try and do some logging and
code sniffing, see if you can dope it out. If your
buddy has Edit, maybe he has a logger too (ATAP
or EFILive) which is not VIN locked.
Slide you up onto the fat part of the torque curve.
You probably want to think out the cam & converter
as a combo. Why two trannies and (presumably)
identical converters would change low end torque,
eludes me. But I wouldn't be surprised if something
during the install got messed up (like, for example,
the crank position sensor got hit and the engine
management is running without it at reduced power).
Or some signal out of the trans is putting PCM at a
wierd place, causing an abuse mode trigger. Or a
vacuum leak. Or.... So many little things that could
go wrong, got to get inside its head to figure out.
It may take days or even weeks for some of these
kind of things to manifest as SES codes but you
probably ought to try and do some logging and
code sniffing, see if you can dope it out. If your
buddy has Edit, maybe he has a logger too (ATAP
or EFILive) which is not VIN locked.