Is your 03-05 GM Truck seem slow?

[vhato]

I can't believe how gramatically incorrect my Subject is. But I know you all get the point.

 

I must post a link to another site I posted this in. GM-Trucks don't allow for the format I wrote it in. Sorry.

 

http://www.fullsizechevy.com/forum/showthr...67&page=1&pp=15

 

 

Here are the graphs

 

 

Ignore the last frame of data in each graph because that is where I stopped the graph.

 

The Red line is my foot

Blue Line is Timing Advance (it should steadily increase)

Green Line is engine RPM during acceleration

 

Dead Stop to 4700 RPM. 1st gear-Timing falls to pieces

 

1st-to-2nd upshift. ~5000 RPM in 1st gear. Again Timing drops into the negative

 

There you have it. Total loss of HP and Torque. Thanks to Torque Management.

 

I couldn't believe it either. From a dead stop the computer is holding back HP and it begins its downward spiral of reducing HP at 3,200 RPM all the way to shift where it kills it EVEN MORE.

That brand new 295 HP 330lbft 5.3 V-8 will NEVER be as strong as advertised unless you get a programmer than removes TM or a custom TM.

[rascal]

do they put that on the manual trans motors?

[apache sierra]

I can't believe that there would be a problem with over torqueing on the heavy duty transmissions. For years they have held up well towing, so why the torque management? Thats why I got the westers tune when the truck was new. I couldn't stand the performance. You could tell the 6.0 had power it just wasn't getting to the pavement. The shifts were soft and when you (kicked it down) nothing was happening. I had Lyndon remove most of the torque management(not all) and it made a world of difference. Now it runs like its suppose to

[millerwd]

Vhato, regarding Tow/haul mode. Do you know what position the tow/haul selector was in when this graph was stored?.

[vhato]

Vhato, regarding Tow/haul mode. Do you know what position the tow/haul selector was in when this graph was stored?.

 

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Tow/Haul was off. I plan to do another run with Tow/Haul engaged.

[millerwd]

vhato, thanx. I'm real curious to see how the timming is managed..In TH when you manually shift you can hit the rev limiter in 1st and 2nd, I didn't have enough road to get to the top end of 3rd.. It definitely launches harder in 1st though., such that it has to be more than just transmission parameters.

I'm amazed at how much smoother this engine runs at high revs compared to my "96 Vortec. It feels like it would do 6 grand without a sweat. It's just too short a trip from 3800 RPM to 5200 RPM. LOL

Have you any idea the Max RPM Westers is doing to a stocker?

 

 

Just my 2 cents.

billm

[fastdrvr23]

vhato, thanx. I'm real curious to see how the timming is managed..In TH when you manually shift you can hit the rev limiter in 1st and 2nd, I didn't have enough road to get to the top end of 3rd.. It definitely launches harder in 1st though., such that it has to be more than just transmission parameters.

I'm amazed at how much smoother this engine runs at high revs compared to my "96 Vortec. It feels like it would do 6 grand without a sweat. It's just too short a trip from 3800 RPM  to 5200 RPM. LOL

Have you any idea the Max RPM Westers is doing to a stocker?

 

 

Just my 2 cents.

billm

 

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On my 4.8L Lyndon raised the WOT shift points to 5600 and it made a huge difference, especially at the top of 2nd gear. I'm sure he'd change them to whatever you asked for, but that's what he told me to use for safety.

 

I had him change the Tow-Haul Transmission parameters too, (higher line proessure mainly I think) it will break loose the 1st to 2nd shift its so firm, and I have a 3.42 rear gear!

[millerwd]

fastdrvr23, t thanx for the feed back. What are your rev and MPH limiters set to?

billm

[fastdrvr23]

fastdrvr23, t thanx for the feed back. What are your rev and MPH limiters set to?

billm

 

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I'm pretty sure the rev limiter is close to 5600, maybe 5800? I've only hit it one when I manually held the gear down in first, it won't shift out like it did with the factory program, so I bumped it that one time.

 

My overall speed limiter is set to 130MPH.

 

Per gear I'm not really sure if he did it solely on RPM's or MPH mixed in with it.

I know it will shift out of 2nd somewhere up near 90MPH now, a toally different beast from stock!

[02denali]

yes they do put tqm in all vehicles standard or auto. there is torque management in the engine and the trannies.

[millerwd]

how do you program TM for a manual transmission?

[vhato]

how do you program TM for a manual transmission?

 

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You wouldn't need Torque Management.

 

 

On another note:

 

Max shift speed of the 4L60-E (1500) is 6100 RPM

Max shift speed of the 4L65-E (SS/SSR) is 5600 RPM

Max shift speed of the 4L80-E (1500HD+) is 5200 RPM