Custom Tune question.

Mark_in_Tulsa · November 30, 2004

Is this even at all possible with a custom tune? I was thinking yesterday as I was playing around with the TOY/Haul button. Is there anyway to get a custom tune that lets say improves responsiveness and fuel milage. BUT when you hit the TOY/Haul button, it totally changes the Tune to something ALOT more aggressive. The first thing that comes to mind that the PCM wouldn't have enough memory for 2 seperate tunes.

Butch 02 Denali · November 30, 2004

Is this even at all possible with a custom tune? I was thinking yesterday as I was playing around with the TOY/Haul button. Is there anyway to get a custom tune that lets say improves responsiveness and fuel milage. BUT when you hit the TOY/Haul button, it totally changes the Tune to something ALOT more aggressive. The first thing that comes to mind that the PCM wouldn't have enough memory for 2 seperate tunes.

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Unfortunatly Mark, the tow/haul can only be programmed for tranny functions like shift points and firmness. Would be nice though!!!

Butch 02 Sierra Denali

BLACK-WIDOW · December 1, 2004

I was thinking yesterday as I was playing around with the TOY/Haul button. Is there anyway to get a custom tune that lets say improves responsiveness and fuel milage. BUT when you hit the TOY/Haul button, it totally changes the Tune to something ALOT more aggressive..

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Mark,

I just ordered my Wester's Tune last week exactly like you want. I asked Lyndon if he could make the normal programming more towards fuel economy and performance w/o the Torque Management. Then make the tow/haul botton into a race-mode. Better responsiveness, firmer shifts, higher shift points and possibly even changing the timing curve around a little. I will let you know how it comes out. I'm super stoked to get it. Just call Lyndon, he is a genius.

Tim

99silveradoz71 · December 1, 2004

Hmm, now if we could just rig the accelerator pedal to have those slick lights and a turboboost function

Butch 02 Denali · December 1, 2004

I was thinking yesterday as I was playing around with the TOY/Haul button. Is there anyway to get a custom tune that lets say improves responsiveness and fuel milage. BUT when you hit the TOY/Haul button, it totally changes the Tune to something ALOT more aggressive..

<{POST_SNAPBACK}>

Mark,

I just ordered my Wester's Tune last week exactly like you want. I asked Lyndon if he could make the normal programming more towards fuel economy and performance w/o the Torque Management. Then make the tow/haul botton into a race-mode. Better responsiveness, firmer shifts, higher shift points and possibly even changing the timing curve around a little. I will let you know how it comes out. I'm super stoked to get it. Just call Lyndon, he is a genius.

Tim

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Tim,

The tow/haul can only be programmed for transmissiom functions, shift pressure (firmness), shift points, shift timing and torque converter lockup. The "Race-Mode' tuning is generally, firmer shifts and a 200rpm boost in the shift points. The fuel economy/performance changes come from the new "MAF 3D" tuning that Lyndon has developed. basicly, at light throttle, the MAF is programmed differently than at full throttle. Lyndon is a genius!!!

Butch 02 Sierra Denali

fastdrvr23 · December 1, 2004

I was thinking yesterday as I was playing around with the TOY/Haul button. Is there anyway to get a custom tune that lets say improves responsiveness and fuel milage. BUT when you hit the TOY/Haul button, it totally changes the Tune to something ALOT more aggressive..

<{POST_SNAPBACK}>

Mark,

I just ordered my Wester's Tune last week exactly like you want. I asked Lyndon if he could make the normal programming more towards fuel economy and performance w/o the Torque Management. Then make the tow/haul botton into a race-mode. Better responsiveness, firmer shifts, higher shift points and possibly even changing the timing curve around a little. I will let you know how it comes out. I'm super stoked to get it. Just call Lyndon, he is a genius.

Tim

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I've had my tune from Wester's for about 9 months now, set up pretty close to what you guys are looking for.

Tow/Haul mode was setup as a Shift Kit basically. He upped the Line pressure, and set the shift timing (as in time between shifts, not engine timing) to something rediculously quick. It shifts hard enough in Tow/haul when driving normally, to knock my radar detector down off the windshield, very hard shifts. At heavy throttle, it's about perfect. My old 1989 C1500 with a Stage II B&M kit and the throttle plate drilled out wasn't near this hard. It won't really change any of the WOT shift parameters (Shift detents), as they will carry over to the regular mode too. I have an 89 octane tune for mileage, with the Tow/Haul modified, so I imagine a 93 hot tune like this would be a beast!

Driving regular, my truck shifts nice and firm, fairly quick, but not harsh like the Tow/Haul setup. I didn't remove T.M. totally, but took as much away as could be done safely.

The Performance won't be any different engine wise, but your shifting will be a hell of a lot quicker/harder if you decide to go this route. I think he could also keep from retarding the timing at shifts (which is probably similar to the removal of Torque Management) but I wouldn't ask for much of that, it shifts hard enough to make you think it's gonna break, without that being changed.

Lyndon is indeed the man!

fastdrvr23 · December 1, 2004

Tim,
The tow/haul can only be programmed for transmissiom functions, shift pressure (firmness), shift points, shift timing and torque converter lockup. The "Race-Mode' tuning is generally, firmer shifts and a 200rpm boost in the shift points. The fuel economy/performance changes come from the new "MAF 3D" tuning that Lyndon has developed. basicly, at light throttle, the MAF is programmed differently than at full throttle. Lyndon is a genius!!!

Butch 02 Sierra Denali

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I was hoping you'd respond again Butch, since you helped me alot back when I ordered mine!

Heck, I just need to get a Duramax now so Lyndon can work his magic on that...