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Go Back   Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 04.5-05 LLY Forum > 04.5-05 LLY Performance Parts Discussion
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04.5-05 LLY Performance Parts Discussion Discussion of Performance Parts For the 04.5-05 LLY Duramax Trucks No Advertising

 
       

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Old 04-21-2009, 09:22 PM   eBay Motors   #1 (permalink)
EastCoastGoose
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LLY Mileage

Hey fellas, just checked my mileage after a full tank of bashin my truck around at the track and blowin smoke all over the mid-atlantic and got 19 mpg all city driving hand calculated! this was on 90hp tune. on stock tune, i'll get 15 if i did that. so that is my best so far, 19 mpg WOT city / 28 mpg hwy....man i love livin at sea level lol
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2005 GMC LLY Farm Truck

Runs 13's and my hot girlfriend likes F*rds .....

EFI/DSP5 tuned by Rob and Nick

And some other goodies
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Old 04-21-2009, 09:27 PM   eBay Motors   #2 (permalink)
SzymoDmax
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i get about 15 around town and 20 on the highway empty, thats with 120 ppe tune
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2004 chevy 2500hd with lly
efi live & dps 5 switch tuned by idahorob
mbrp straight piped 4"duals 6" tips
egr blocker plate, lbz mouth piece
06, grill and hood, sunroof and many more
Moto Metal 950 wheels with 285/75/16 BFG'S

Truck#2 1983 chevy 4x4 with 5.9 12 valve

Let men marry men and women marry woman...in 3 more generations there will be no more democrates

Last edited by SzymoDmax : 04-22-2009 at 10:22 AM.
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Old 04-21-2009, 09:29 PM   eBay Motors   #3 (permalink)
mijdirtyjeep
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WOW that is even better then my 90hp EFI tune. Nice job. I guess I just need to beat the crap out of her more
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2003 Chevy 2500hd crew cab 4x4, D/A
Ready Lift Torsion keys up Front, and SuperLift Add-A-Leaf in the rear
285/65-18's Hankook's on 18" Predator rims
4" Magnaflow Exhaust
Autometer Pyro/Boost Gauge in overhead mount
Modified factory air box
Ported Turbo Horn
EFI LIVE V2
www.performancetruckproducts.com
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Old 04-21-2009, 09:38 PM   eBay Motors   #4 (permalink)
EastCoastGoose
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Now, granted I still have my dinky little 245's on there. I'm gettin 285's soon, so i don't expect to be seeing these numbers for long!
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2005 GMC LLY Farm Truck

Runs 13's and my hot girlfriend likes F*rds .....

EFI/DSP5 tuned by Rob and Nick

And some other goodies
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Old 04-21-2009, 09:53 PM   eBay Motors   #5 (permalink)
SzymoDmax
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ya the 285's hurt me right around 1 to 1.5 mpg. but its worth the trade to me
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2004 chevy 2500hd with lly
efi live & dps 5 switch tuned by idahorob
mbrp straight piped 4"duals 6" tips
egr blocker plate, lbz mouth piece
06, grill and hood, sunroof and many more
Moto Metal 950 wheels with 285/75/16 BFG'S

Truck#2 1983 chevy 4x4 with 5.9 12 valve

Let men marry men and women marry woman...in 3 more generations there will be no more democrates
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Old 04-22-2009, 07:09 PM   eBay Motors   #6 (permalink)
Skyhighsami
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Dang, I need to get mine tune ASAP I haven't gotten better than like 13.5 14 mpg yet
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Old 04-22-2009, 07:27 PM   eBay Motors   #7 (permalink)
SzymoDmax
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Quote:
Originally Posted by Skyhighsami View Post
Dang, I need to get mine tune ASAP I haven't gotten better than like 13.5 14 mpg yet
ya the tone helps but only if you can keep your foot off the petal. which is really hard to do
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2004 chevy 2500hd with lly
efi live & dps 5 switch tuned by idahorob
mbrp straight piped 4"duals 6" tips
egr blocker plate, lbz mouth piece
06, grill and hood, sunroof and many more
Moto Metal 950 wheels with 285/75/16 BFG'S

Truck#2 1983 chevy 4x4 with 5.9 12 valve

Let men marry men and women marry woman...in 3 more generations there will be no more democrates
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Old 04-22-2009, 07:32 PM   eBay Motors   #8 (permalink)
EastCoastGoose
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lol that was my whole point i was blowin smoke all over everybody and still got better mileage than i would if i babied it on stock lol...gotta love diesels
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-Tyler

2005 GMC LLY Farm Truck

Runs 13's and my hot girlfriend likes F*rds .....

EFI/DSP5 tuned by Rob and Nick

And some other goodies
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Old 04-22-2009, 07:33 PM   eBay Motors   #9 (permalink)
SzymoDmax
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ya these things are pretty great. got to love em
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2004 chevy 2500hd with lly
efi live & dps 5 switch tuned by idahorob
mbrp straight piped 4"duals 6" tips
egr blocker plate, lbz mouth piece
06, grill and hood, sunroof and many more
Moto Metal 950 wheels with 285/75/16 BFG'S

Truck#2 1983 chevy 4x4 with 5.9 12 valve

Let men marry men and women marry woman...in 3 more generations there will be no more democrates
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Old 04-23-2009, 08:12 PM   eBay Motors   #10 (permalink)
Onebadbowtie86
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28 on the highway? I thought mine was doing good at 22 on the highway with the 285's
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2004.5 ext. cab short box lly---Hypertech on level 3--lbz mouth peice--Resonator plugged
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