Tuning advice for the LS4?
07-22-2009, 09:04 AM
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Tuning advice for the LS4? Guys, I am in a bit of a pickle here and didn't know if any of you experienced tuners or students of tuning theory could help me out. I have an 05 Grand Prix GXP with the 5.3L LS4 engine. I have made a custom fenderwell intake that is wrapped in header wrap to negate heatsoak, and replaced the stock mufflers with Flowmaster Super 44's, so I have increased air-flow, decreased IAT's and decreased back-pressure. I have a friend who has HP tuners and owes me a tune but he is used to tuning cobalts with 4-bangers in em. My question is what should I change in my tune to get the most out of my mods? My car is running super rich ESPECIALLY at WOT. It almost bogs down at WOT because it pours so much gas in. Any ideas would be greatly appreciated. Thanks gents!
07-23-2009, 03:33 PM
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Guys, I am in a bit of a pickle here and didn't know if any of you experienced tuners or students of tuning theory could help me out. I have an 05 Grand Prix GXP with the 5.3L LS4 engine. I have made a custom fenderwell intake that is wrapped in header wrap to negate heatsoak, and replaced the stock mufflers with Flowmaster Super 44's, so I have increased air-flow, decreased IAT's and decreased back-pressure. I have a friend who has HP tuners and owes me a tune but he is used to tuning cobalts with 4-bangers in em. My question is what should I change in my tune to get the most out of my mods? My car is running super rich ESPECIALLY at WOT. It almost bogs down at WOT because it pours so much gas in. Any ideas would be greatly appreciated. Thanks gents!
07-24-2009, 04:25 AM
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email Tiredgxp and maybe if you ask him nicely he will send you his tune
https://ls1tech.com/forums/ls4-front...ease-help.html
https://ls1tech.com/forums/ls4-front...14-tuning.html
https://ls1tech.com/forums/ls4-front...ease-help.html
https://ls1tech.com/forums/ls4-front...14-tuning.html
07-24-2009, 07:16 AM
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email Tiredgxp and maybe if you ask him nicely he will send you his tune
https://ls1tech.com/forums/ls4-front...ease-help.html
https://ls1tech.com/forums/ls4-front...14-tuning.html
https://ls1tech.com/forums/ls4-front...ease-help.html
https://ls1tech.com/forums/ls4-front...14-tuning.html
Someone else's tune is really only useful as a comparison - won't necessarily work the same in other vehicles due to altitude, production tolerances, different mods...
rzuff was correct - get a WB and get your AFR dialed in at part and WOT. The you can start worrying about adjusting timing, torque managment, shift speeds, fan control, shift pressures (even in tap mode this tranny takes forever to shift gears with the stock settings), TCC duty cycle...
07-24-2009, 12:21 PM
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If he's using HPT and a computer to tune my car what kind of wideband should I purchase and is the sensor all I will need or will I need something like an AEM UEGO to decode the signal?
07-24-2009, 12:27 PM
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It depends what version of Hp tuners he has. If it's pro you can hook the wide band up to it and get the reading through the computer. If not you need a gauge and it makes tuning much more difficult.
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07-24-2009, 06:34 PM
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Ha!
Someone else's tune is really only useful as a comparison - won't necessarily work the same in other vehicles due to altitude, production tolerances, different mods...
rzuff was correct - get a WB and get your AFR dialed in at part and WOT. The you can start worrying about adjusting timing, torque managment, shift speeds, fan control, shift pressures (even in tap mode this tranny takes forever to shift gears with the stock settings), TCC duty cycle...
Someone else's tune is really only useful as a comparison - won't necessarily work the same in other vehicles due to altitude, production tolerances, different mods...
rzuff was correct - get a WB and get your AFR dialed in at part and WOT. The you can start worrying about adjusting timing, torque managment, shift speeds, fan control, shift pressures (even in tap mode this tranny takes forever to shift gears with the stock settings), TCC duty cycle...
07-27-2009, 12:14 PM
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well guys, that sucked, we went to tune it saturday and evidentally when gm certified my car to be resold, they input the newest calibration to the tune and HP tuners couldn't read it, so now I have to wait a few more weeks till my buddy gets down from ohio again. Booo, this should be an easily fixable problem though. We're just going to mess with the fuel map at first then dick around with timing and some others. Should I keep torque management enabled or take it off?
