Problem with delievered torque

[cmitchell17]

I have never figured out why my deleivered torque is so low. I barely see over 300ft.lbs.

I know with a modded engine without dialing in the maf and VE it will not be accurate, but with a stock 5.3, just exhuast, why would it not read more like 330+ especially with a little added timing.

I can compare my stock tune deleivered torque with my modififed tune and my tune makes about 10-30ft.lbs more torque, but thats at part throttle.
At wot its the its a little more but about the same.

It seems like gm tested these engines under a lot of conditions and monitored the torque they made. So what conditions do I have that I am not making the correct torque.
However, it makes good torque at low rpms according to the deleivered torque. It makes the same torque at 1500-2000rpms as it does at 4000.

Anybody else with a 5.3, what is your delivered torque?

I think i could also control my shift pressures a little better with more torque reading at WOT.

I have cleaned my maf with maf cleaner.

Also while im asking a question what does it mean when your logging TCC mode and it says, TCC apply enabled, or TCC coast? Mine likes locking up when giving it more gas to go up a hill, and then it starts lugging untill you give it more then it finnaly releases. It does this with stock settings too.

[joecar]

Also while im asking a question what does it mean when your logging TCC mode and it says, TCC apply enabled, or TCC coast? Mine likes locking up when giving it more gas to go up a hill, and then it starts lugging untill you give it more then it finnaly releases. It does this with stock settings too.

This is what it is believed to mean:

Off   = "Off"           -> A-B and I-J
App   = "Applying"      -> B-C-D
AppEn = "Apply Enabled" -> D-E
Lock  = "Locked"        -> F-G
Coast = "Coasting"      -> H (similar to D-E, see note below)
Rel   = "Releasing"     -> H-I

note:
H-I might also have an intermediate stage so it may look like the mirror of B-C-D-E;
in this case, then "Coast" would probably be the flat part.

Diagram is from post #5 of this thread: showthread.php?t=4304

[cmitchell17]

Thanks joecar for the input.

I just don't see why my converter always locks when I give it more throttle and the speed stays the same or decreases speed. I can't really figure out if its in 4th TCC unlock when I hit the hills or what. It seems that ways and the logs look that way.

I wish the 4l60 had a few more gears like a gear between 3rd and 4th to cruise with the TCC unlocked, and definately a gear between 1st and 2nd.

[cmitchell17]

I found another 5.3 log out of a yukon. And I see about 292lb. feet of torque at about 4000rpms.

But I remember a log from a 6.0 that showed about 350-360lbfeet of torque.

[southern]

I just looked at some logs I had on my pc and the highest I could find was 305 but I will have to log my current tune and see

[Gordy M]

A log from my LQ9 6.0L shows 398 in second gear under acceleration. HTH. I could not find any files from my 5.3L Yukon.

[cmitchell17]

I logged a LQ4 and I think I remember it showing around 350-360. Thats what its rated for I think.

But I wonder why the 5.3 is only making 300.

Was the LQ9 running the stock timing.

[cmitchell17]

What are yalls IAT.

I think that has a effect on it. I think I saw higher in the winter.

If you have no internal engine work stock heads cam intake, I would not see why this would not be accurate.

I wonder if the delievered transmission torque is diffrent from the engine torque.

[southern]

Well I did a little tuning tonight just messing around waiting on my wideband and the highest I saw was 316 at I think 86*

[Gordy M]

Was the LQ9 running the stock timing.

The engine was stock but I just installed a trans tune. RPM was 4019, IAT was 95, TPS was 100, MAF was 214 and temps were 195. HTH