me and a guy have discussed torque managment on several occasions, theres gotta be a way around it...how?????? I'm sure ya'll noticed that when you leave the line WOT you really dont get much off the line but the som bitch starts screamin' if you stay in the throttle a little bit.

 

i'm gonna take a stab at this...

torque management....

lets say whatever viehicle your talking about has a red line of say 6000

but the torque curve starts to fall off at say 4800..you may want to go to 5000 anyway

any extra rpm is in essence wasted in getting the viehicle to accelerate any faster
so thats where you shift for max torque and torque is what makes stuff move not horsepower...

...zap!

 

Lol Zap. No No

Torque managment is programmed into the computer so when your sitting there and nail it, and the computer doesnt think you need all that power/tourque, it backs it off a little, so really your not getting 100% from your engine. Brief explanation .

Computer tuning.
You should see it on the Chevy's. They suck about TM.

 

sorry its just the drag racer in me..

i'm sure you see where my answer came from

give me a carburator....


...zap!

 

So what do most of the tuners do about this?

 

Lol, I know what you mean. All this computer stuff is complicated.
I think the way that torque managment actually works is by pulling a little timing out to reduce some stress on the drivetrain when its shifting at wot and under heavy load

Lol, heck Im not exactley sure. I just know it slows ya down.

 

I know they (well, most) reduce it quite a bit. Getting rid of it totaly is supposedly a bad thing.
Im not sure how exactley its done.

Im probably all wrong. This has me wondering. Im searching right now and trying to find some info on this.
Ill post back what I can find. Somebody smarter than me (most people) should give us a good idea of it.

 

Ok, here is a little bit I found on a *GASP* (for all you Chevy haters) CHEVY forum.

Backs off timing to reduce wear on the drivetrain-plain and simple.
http://www.fullsizechevy.com/forums/...que+management
Look how much timing is reduced in those graphs and such.
Like I said, I dont think Ford TM is anywhere near as bad as Chevy's though.

By the way, I though only the 04+ models had TM, not the Pre 04's?


Edit, forgot link

 

 

That's very interesting Bartak. Does torque management affect the fords as much as the chevy's? On my '97 5.4, the throttle body position is controlled by a cable, so the pcm doesn't decide how much air to let into the engine. But it does controll ignition timing. Is that how chips affect performance, especially at shift points and mph limits?

 

Now a days most manufacturers are using what they call torque base engine management. Basically - like somebody else said the pcm interprets the user input (what you are doing with the pedal) to adjust the throttle to deliver the amount of torque it thinks you want. Once the throttle is controlled the rest engine management like the fuel delivery and spark timing isn't really different from how its been done for many years.

The main reason the do this is for driveability. It can be tailored to be more aggressive or less aggressive depending what you are trying to achieve. In the US & Canada most drivers prefer a less aggressive smoother feeling drive as compared to other countries. There are other reasons they use electronic throttles as well - they can get rid of the idle speed control valve, it gives a better way to achieve vehicle and engine speed limiting - instead of shutting off injectors like the used to they just take over control of the throttle.

Traditional torque control would mainly involve controlling torque excursions on tip-ins and tip-out, and trans shifts using fuel contorl and spark advance - which I beilieve the still do but with electronic throttles it gives them another bag of tricks.

When you are talking about retarding the timing they can do that during a shift to lessen the hit on the trans but for the most part most of those items regarding spark in the link aren't because of "torque" management. When you talk about spark timing for an engine there are a couple of main concepts. First off lets assume just standard air and engine temps - at any particular operating point (engine speed and load) there is what is called MBT spark - or spark timing that gives the max brake torque. This varies depending on where you are at on the engine map (speed and load map). At low engine loads you can operate at or close to MBT spark, however when load increases the engine will become what they call borderline limited. Borderline limited means that the spark timiming is limited up to the point to where spark knock will occur. This spark timing can be way lower than MBT spark - yes even negatively advanced, that is not unusual. The worst case is at low engine speeds and high loads (like WOT) - although there is usually a little fuel enrichment at WOT which will allow it to take a little more spark advance than if running at stoich.

You can see the speed limiting is kicking in at 94 mph when the engine management won't open the throttle up even though he's stomping down on the pedal.

 

...zap!

 

"Now that there's funny right there, I don't care who ya are."

 

thats some funny shiznit.