8.1 Vortec vs. ISB in Fuel Mileage. - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 05-17-2006, 01:11 PM Thread Starter
 
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8.1 Vortec vs. ISB in Fuel Mileage.

Not that it'll be any compatition.
But me and a freind are travelling from Ohio to Montana.
I have my truck as shown below. He has a Avalanche 4x4 8.1 Vortec.
I could see my MPG be almost double his.
Never the less, it'll be fun to see. I'll give ya the reports when I get back.
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post #2 of 6 (permalink) Old 05-20-2006, 03:04 PM
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Last I heard, the 8.1 actually gets 8.1 mpg's.

Dale

my daily driver:67 F100, 300 4V, cammed, 4 spd.
or, 08 Subaloser Forester, 2" lift.
work rigs: 94 IH 4900, DT466(originally 230hp), #0 fuel plate, tighter gov springs, 22* timing
or, 06 IH 7400, DT466E, 300hp


My Low Buck fuel rate site:
www.freewebs.com/nevrenufhp
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post #3 of 6 (permalink) Old 05-20-2006, 06:05 PM
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Yikes, that sucks 8.1mpg, and I thought I was hurtin. I've started driving slower to offset the higher price of fuel, and I think I've gained about 2.5mpg I should be up to around 19 or 20, from as low as 16.4. Goes to show what your right foot can do for you.
Sean

2000 2500 reg. cab 4x4 auto 577hp
09 6.7L QC LB stick, 4x4.

TOTAL PERFORMANCE DIESEL 707-545-FUEL (3835)
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post #4 of 6 (permalink) Old 05-20-2006, 07:24 PM
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The strange part is, I know a guy that got a 2500 krew kab with the 8.1, put a lift & 35's on it and gets 13mpg's.

Dale

my daily driver:67 F100, 300 4V, cammed, 4 spd.
or, 08 Subaloser Forester, 2" lift.
work rigs: 94 IH 4900, DT466(originally 230hp), #0 fuel plate, tighter gov springs, 22* timing
or, 06 IH 7400, DT466E, 300hp


My Low Buck fuel rate site:
www.freewebs.com/nevrenufhp
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post #5 of 6 (permalink) Old 05-25-2006, 12:18 AM Thread Starter
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Quote:
Originally Posted by nevrenufhp
The strange part is, I know a guy that got a 2500 krew kab with the 8.1, put a lift & 35's on it and gets 13mpg's.
I believe it, I've encounterd a Gasoline engine made on a Tuesday too. I drove a F450 V-10 Camper. It was hauling 2 familys and there stuff and got 8MPG @ 70 MPH which I thought was very decent.
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post #6 of 6 (permalink) Old 05-25-2006, 12:46 AM
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Chevy 2500 4.10 rear with a 8.1 towing about a 10,000-12,000 pound camper I saw get 5 mpg. The guy towed it from MA to VA and got back and bought a Diesel.

2000 F-250
4x4 ECSB
4" DP - 5" Back - 8" Black miter
K&N Intake
Tony Wildman 6pos Chip
Stewart Warner Maximum Boost, Trans, Pyro
35" BFG KM MT's
Jensen 7" Flip out DVD/CD
10" Rockford Fosgate Subwoofer
2400w Rockford Fosgate Amp

Soon to come -
4"-6" Lift
HID's
05+Front end Conversion
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