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03-08-2007, 07:04 PM
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Hummer Guru
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Join Date: Jul 2005
Posts: 4,123
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Re: Great results from PCM for Less tuning . . .
Quote:
Originally Posted by H3.007
Are the 315s 33" or 35"?
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315's are ~35"
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03-08-2007, 07:30 PM
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Hummer Expert
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Join Date: May 2006
Location: Johnstown, PA.
Posts: 553
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Re: Great results from PCM for Less tuning . . .
Thought so but wanted to be sure! Thanks Sewie!
What MPG were you gettin before Westhillsat?
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03-08-2007, 08:27 PM
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Hummer Authority
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Join Date: Nov 2005
Location: Mississippi
Posts: 1,776
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Re: Great results from PCM for Less tuning . . .
Before with the 33" I was getting between 12 - 14 mpg, even on my first H3 with 32" I never got above 14 mpg. Only once when I drove it home new, the first H3 base model did I get 17 mpg and that was driving 55 during the break in period.
I am using 88 octane, which in Montana is the middle grade.
Last night was only on the interstate, so no city driving between the
fillups.
I'm just happy that my mileage didn't go down, I have heard some people have taken a hit with the 35" tires in mpg's.
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Black Sheep Hummer Squadron
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03-08-2007, 09:54 PM
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Re: Great results from PCM for Less tuning . . .
62 miles for a gas mileage check is not very useful at all. Still waiting for feedback on the PCM after a few hundred miles. Sounds promising.
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03-08-2007, 09:57 PM
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Hummer Veteran
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Join Date: Feb 2006
Location: SoCal
Posts: 127
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Re: Great results from PCM for Less tuning . . .
Quote:
Originally Posted by Steve - SanJose
62 miles for a gas mileage check is not very useful at all. Still waiting for feedback on the PCM after a few hundred miles. Sounds promising.
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Ditto....what he said^^^^^^
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03-09-2007, 12:28 AM
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Hummer Novice
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Join Date: Feb 2007
Posts: 20
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Re: Great results from PCM for Less tuning . . .
Quote:
Originally Posted by Steve - SanJose
62 miles for a gas mileage check is not very useful at all. Still waiting for feedback on the PCM after a few hundred miles. Sounds promising.
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I have put 1,600 miles on my H3 since the PCMforless upgrade. I have 315/75-16 BFG MTs with 35psi all around. Average highway mileage is 15.6mpg and back and forth in town is 14mpg. I drive back and forth from Morristown, NJ to Providence RI regularly so have gone through many tanks of gas and my mileage has been pretty consistent after the first tank.
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Don't save the best for last, the smile for later or the "Thanks" for tomorrow.
Paul
'01 Esprit V8TT - intercooled, chipped and Quaifed
'08 H3Alpha Off-Road-315/75-16Maxxis Bighorns, grill&marker lights,+1 light Bar OEM Nav w/backup cam
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03-09-2007, 07:57 AM
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Hummer Expert
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Join Date: May 2006
Posts: 616
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Re: Great results from PCM for Less tuning . . .
I put in my reprogramed PCM Tuesday. Tonight I put in fuel. After 187 miles, I was able to squeeze in 9.6 gallons. You do the math.
Most of this winter I was running between 17.5 and 18.5.
My opinion; Truck runs easier on the highway. Takes off better and shifts cleaner. I'm happy I did it.
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Black 06 H3, Adventure Package, Monsoon Sound, Sunroof, Chrome and Tow Package
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03-12-2007, 05:23 AM
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Hummer Authority
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Join Date: Nov 2005
Location: Mississippi
Posts: 1,776
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Re: Great results from PCM for Less tuning . . .
I took a trip over to Helena from Great Falls. Just to put my drive in perspective Great Falls is over 3,300 ft in elevation and Helena is just over 4,000 ft. To get to Helena you have to cross the mountains, so I would say I was climbing some grades that ended up being 4,500 -5,000 ft. The shifting was great going through the mountains on the interstate.
On the way over I was getting alot of head wind also, the wind was probably at least 40 mph coming head on. Had that wonderful  flapping with the marker lights. The wind is blowing 30 mph outside now.
I did 173 miles and got 14 mpg with the 315 tires. I have a little over 312 miles on the pcm now.
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Black Sheep Hummer Squadron
Last edited by westhillsat : 03-12-2007 at 07:39 PM.
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03-12-2007, 05:57 AM
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Hummer Veteran
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Join Date: Sep 2006
Location: Clements, CA.
Posts: 213
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Re: Great results from PCM for Less tuning . . .
Quote:
Originally Posted by deserth3
I put in my reprogramed PCM Tuesday. Tonight I put in fuel. After 187 miles, I was able to squeeze in 9.6 gallons. You do the math.
Most of this winter I was running between 17.5 and 18.5.
My opinion; Truck runs easier on the highway. Takes off better and shifts cleaner. I'm happy I did it.
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Mind sharing what you had it set for?
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03-21-2007, 07:05 PM
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Hummer Novice
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Join Date: Feb 2007
Posts: 17
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Re: Great results from PCM for Less tuning . . .
Quote:
Originally Posted by deserth3
I put in my reprogramed PCM Tuesday. Tonight I put in fuel. After 187 miles, I was able to squeeze in 9.6 gallons. You do the math.
Most of this winter I was running between 17.5 and 18.5.
My opinion; Truck runs easier on the highway. Takes off better and shifts cleaner. I'm happy I did it.
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Thanks for the feedback. I'm very glad you like it!
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