NXRICKY

iTrader: (1)

When does the factory ecu try to to limit the engines output. Looking for what horsepower and torque. Is it on all GM's including truck. 4L80E.
Ricky

MontereyLS1

iTrader: (4)

Go to Ls1Tuning.com and do a search....you will find lots of info on how to delete TM

Yes...it is on the trucks too

NXRICKY

iTrader: (1)

Thanks for the input, but I need to know when or at what point does it take over. We used ls1 edit on our car but that thing put down 636 hp to the ground. Looking to know more about or around the 500hp range. Will it take over.
Rickyk

jimmyblue

iTrader: (11)

On my year the value can only be set to 640. However you
can zero the authority. Newer models I have seen with 1280
(you should be so lucky).

Engine and trans torque management are in there. Electronic
throttle cars I think are more tangled up with it on the engine
side. M6 cars have trans TM zeroed from factory.

Brains

iTrader: (7)

The max torque number we can touch in the PCM editing software is related to the traction control system. It is used by the PCM to determine when to start limiting power while the traction control is active (ie. while ACTIVELY limiting wheelspin).

Torque management is otherwise only active during shifts, or when the PCM determines an "abusive" action has taken place (neutral drops, excessive overrev, etc). During a shift is really the only time you'll notice it, where it will drop ignition timing for the duration of the shift. On manual transmission vehicles it will limit timing when the throttle is lifted for a shift, or when the load suddenly drops with the throttle wide open (pushing in the clutch for a shift). It does this to control the shock on the driveline from the shift, as well as managing RPM rise while shifting aggressively. The timing is given back relatively quickly, but its definitely there.

NXRICKY

iTrader: (1)

Ok I might not be asking the right question. How much torque can you put to the ground \with a stock non tuned ECU.
Ricky

SmokingWS6

iTrader: (1)

Your going to have to tune it no matter what, the pcm will fight you over a certain amount. What I don't know, it might pull an insane amount of timing on shifts, or it might continously pull timing at wot if it see's a load over a certain amount, all of which can be corrected with tuning.

Brains

iTrader: (7)

You can put any amount of power down with an untuned PCM -- look at the nitrous guys.. I've seen 550 RWHP with stock motors, stock PCM's from crazy folks hitting 250 shot on the hose. Heck, with a boosted motor, the PCM will report its making less torque than it actually is, since it doesn't see the positive manifold pressure. You'll need fuel worked out of course, but I know you have that covered.

jimmyblue

iTrader: (11)

You can go and zero the commanded torque reduction
and zero the spark retard vs torque cut table and it
will be a toothless hound, let it whine all it wants.

And you have control over the maximum timing retard
(it's a little obscure, in v1.5 it's misnamed (IMO) as
Engine>Spark Retard>Max KR vs RPM but it
really sets the minimum spark advance that any of the
spark retard actors can pull you down to. Put this to a
safe, but not-insane value (stock is -10 degrees and
guess what, this is where you see shift TM drop you
to; I have mine at +20 which means TM, KR and any
other busybody can only drop me back 8-10 degrees
tops. Which still represents a torque cut, but not so
heinous. This is my way of leaving in some level of
trans protection TM, a compromise.