change the lean situation
Thread Starter
Registered User
Joined: Oct 2010
Posts: 14
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change the lean situation ok if are cars are lean why dont we put a bigger fuel pump and change the injectors tune and call it a day or am i missing something . and what injectors do we have lbs wise .
TECH Enthusiast
Joined: Oct 2008
Posts: 593
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From: Rochester, NY
I believe these are tuned lean from the factory for emissions and fuel economy reasons (ratings and for competitive data). A dyno tune remedied my problems. I do not know what size injectors our cars have but for anyone near stock a simple tune is more than sufficient.
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TECH Apprentice
Joined: Nov 2010
Posts: 307
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From: bear,delaware
thanks guys no im not trying to be difficult on making the power i just didnt understand why they tuned the car with knock retard in it . my 05 gtp comp g was my problem maker you did everything possible to get rid of the kr* and i had it late 04 so there was only hp tuners and i was on a limited budget because i was doing a gto build at the same time and well i had extra parts laying around justlike i do now i have a set of 36 pound ls1 injector laying around that y im asking
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Verdad Gallardo thanks guys no im not trying to be difficult on making the power i just didnt understand why they tuned the car with knock retard in it . my 05 gtp comp g was my problem maker you did everything possible to get rid of the kr* and i had it late 04 so there was only hp tuners and i was on a limited budget because i was doing a gto build at the same time and well i had extra parts laying around justlike i do now i have a set of 36 pound ls1 injector laying around that y im asking
TECH Apprentice
Joined: Nov 2010
Posts: 307
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From: bear,delaware
im going to do an intake swap of some sort i have a couple of intake manifolds i already have an ls1 and a ported ls6 because a friend went to a fast set up so im piecing it together slowly hope to have every thing i need by tax time to get my headders to but like they say their is always more than one way to reach a goal and i do like a road alittle less traveled but thanks for all the info guy really appricate it
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Joined: Dec 2005
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From: CT
y'all are panicking over nothing really...
they're not THAT lean... and are actually RICH at WOT...
WOT/PE fueling comes into play after 87% throttle (stock), at which point, you're over 5000 rpm... and again at which point, the fueling is actually RICH, not lean....
stock tune - anything less than 87% throttle and 5000 rpm, the ecm considers you to be at "part-throttle" and fuel trims are still in affect, and adjust the fueling...
if you are MORE than 87% throttle and OVER 5000 rpm, you're in WOT/PE mode, and the fueling is richened up, so you are not lean....
all of this of course, is fixed and adjusted appropriately with a custom tune, to change the ranges, throttle %, fueling, etc etc...
in all the tunes I've done for these cars, the only point at which I've seen most have some KR, is about 4200-4800 rpm... but not from being lean, the timing is a little high... I reduce the timing in that area by a couple degrees, and all is well...
they're not THAT lean... and are actually RICH at WOT...
WOT/PE fueling comes into play after 87% throttle (stock), at which point, you're over 5000 rpm... and again at which point, the fueling is actually RICH, not lean....
stock tune - anything less than 87% throttle and 5000 rpm, the ecm considers you to be at "part-throttle" and fuel trims are still in affect, and adjust the fueling...
if you are MORE than 87% throttle and OVER 5000 rpm, you're in WOT/PE mode, and the fueling is richened up, so you are not lean....
all of this of course, is fixed and adjusted appropriately with a custom tune, to change the ranges, throttle %, fueling, etc etc...
in all the tunes I've done for these cars, the only point at which I've seen most have some KR, is about 4200-4800 rpm... but not from being lean, the timing is a little high... I reduce the timing in that area by a couple degrees, and all is well...
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
Last edited by 06MonteSS; Nov 30, 2010 at 11:39 AM.
