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10-22-2014, 11:31 AM
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#1 |
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Registered User
Join Date: Apr 2014
Location: NOR-CAL
Posts: 1,134
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Tunes for an LS
So I see lots of chatter about tuning these engines in swaps. But what about ones in their factory state?
My wife drives a 2003 yukon. Only 83k miles. But it just feels a little sluggish and gets not very good mileage Yes unknown typical tune up is probably due but what about a "tune"? |
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10-23-2014, 03:43 PM
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#2 |
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Registered User
Join Date: Jun 2012
Location: Pittsgrove, NJ
Posts: 1,502
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Re: Tunes for an LS
There's plenty of untapped power in these from stock form. Mine is a 100k mile+ bone stock engine save for DT headers. Got it tuned on a dyno by a local shop (that I'm not too fond of anymore) and it is making around 300whp/320ft-lbs. Stock is supposed to be 300-325hp and 360-370 ft-lbs at the crank. Considering this is going through a 2 piece drive shaft and very heavy 4l80 I'd say either those headers are miracle workers or the stock tune is just a little on the safe side!
I would get it done at a local tuner in person, not an online tune. Regardless of power, changing the shift points can make a big difference. Can't say you're going to pick up any mpg's though...
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Will 1968 C10 - Project Texa Go 6.0/4L80e 2003 Mitsubishi Lancer Evolution 2002 Ford Excursion 7.3L 2024 Toyota Sienna |
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10-23-2014, 03:48 PM
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#3 |
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Boosted Member
Join Date: May 2002
Location: Mackinaw, IL
Posts: 2,200
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Re: Tunes for an LS
You can get more aggressive with the timing, and DFCO to increase the fuel economy a bit. More power can also be had from timing and some power enrichment tweaks.
It will "feel" more fun to drive with some changes to the throttle body vs pedal position table, shift time and pressure, torque management, abuse management. GM leaves plenty on the table with a stock tune.
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1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2023 Ford Explorer ST - Twin Turbskis 2023 Ford F150 RCSB - Whipple Supercharged 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards TURBO ALL THE THINGS!! |
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10-23-2014, 05:09 PM
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#4 |
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Registered User
Join Date: Nov 2013
Location: Show Low, Arizona
Posts: 778
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Re: Tunes for an LS
You might try this guy-
www.nelsonperformance.com/ or www.wait4meperformance.com Both have mail order tuning services. I've used both with good results |
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10-23-2014, 07:46 PM
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#5 |
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Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Tunes for an LS
Put it on rollers and have a live tune.
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10-26-2014, 02:06 AM
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#6 |
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Registered User
Join Date: Jul 2013
Location: VAFB, CA
Posts: 227
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Re: Tunes for an LS
Always go with a local shop if you can, they can dial it in better than an online tune.
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