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10-01-2003, 11:16 PM
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Join Date: Jun 2003
Location: Philadelphia, PA, USA
Posts: 200
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Hey There everyone,
I had posted a few weeks back about getting a consistant 10.4 mpg with a toally stock truck using regular gas and a mix of highway and city driving.
It has been 10 days since installing a cat back flowmaster exhaust and under the same daily driving conditions I am seeing a 10.8 on my computer. Not too bad, and I also feel a nice performance difference as well as a great sound.
Next is the install of the Diablo programmer right now, and a test drive.
Kevin
2003 Pewter H2, Tire relocator, painted hard tire cover, billet gas cover, MC2 chrome hood handles, stainless bumper letters, 15% tinted front windows,pioneer nav/dvd, xm sat, headrest monitors, tv tuner, defenderworx hood latches, side vents, marker bezels, and chrome MC2 factory style wheels .
__________________
2003 Pewter H2, Tire relocator, painted hard tire cover, billet gas cover, MC2 chrome hood handles, stainless bumper letters, 15% tinted front windows,pioneer nav/dvd, xm sat, headrest monitors, tv tuner, defenderworx hood latches, side vents, marker
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10-01-2003, 11:16 PM
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Join Date: Jun 2003
Location: Philadelphia, PA, USA
Posts: 200
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Hey There everyone,
I had posted a few weeks back about getting a consistant 10.4 mpg with a toally stock truck using regular gas and a mix of highway and city driving.
It has been 10 days since installing a cat back flowmaster exhaust and under the same daily driving conditions I am seeing a 10.8 on my computer. Not too bad, and I also feel a nice performance difference as well as a great sound.
Next is the install of the Diablo programmer right now, and a test drive.
Kevin
2003 Pewter H2, Tire relocator, painted hard tire cover, billet gas cover, MC2 chrome hood handles, stainless bumper letters, 15% tinted front windows,pioneer nav/dvd, xm sat, headrest monitors, tv tuner, defenderworx hood latches, side vents, marker bezels, and chrome MC2 factory style wheels .
__________________
2003 Pewter H2, Tire relocator, painted hard tire cover, billet gas cover, MC2 chrome hood handles, stainless bumper letters, 15% tinted front windows,pioneer nav/dvd, xm sat, headrest monitors, tv tuner, defenderworx hood latches, side vents, marker
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10-02-2003, 05:57 PM
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Hummer Veteran
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Join Date: Dec 2002
Posts: 38
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Kevin,
Thanks for the update.
Currently at 12.5 mpg on the computer through a mix of highway and city driving. At 3k miles - all stock. Keep those tires inflated. ;-) Off the dealership lot, mine were at 30 lbs per tire. Now running 40 lbs.
DVJ
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10-03-2003, 03:41 AM
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Hummer Messiah
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Join Date: Apr 2003
Location: Virginia Beach
Posts: 37,474
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Kevin, I was @ 11.5 with appx 80% cty miles. Since my mods I am at 11.3.
I will admit that I need to check the tire pressure... It is low, I am sure. Probably 32 psi.
Black Lingenfelter Lux
__________________
"My reading of history convinces me that most bad government results from too much government."---Thomas Jefferson
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10-05-2003, 08:21 PM
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Join Date: Aug 2003
Posts: 111
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Just got off a long hwy trip
here are the numbers with cruise set for a minimum of 25 miles each leg.
11.4mpg at 65 mph
9.8 mpg at 70 mph
8.7 mpg at 75 mph
6.9 mpg at 80 mph
These are all 1 mpg +/- .1 better than they were prior to installing a extreme flow muffler.
4 inch lift
37 13.5 inch baja claw radials 35psi
Magna Supercharger
10 KC light bar
Airaid air filter
Extreme flow muffler
Factory 4.10 gears
2 adults and 2 kids. 200 lbs of gear.
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