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02-25-2010, 03:50 PM
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#1 |
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Registered User
Join Date: Apr 2004
Location: carleton,mi
Posts: 45
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Gear ratio for better fuel econo.
I have a 2000 suburban 2500 with a 6.0L. It has 4:10s, narrow 35 inch tires, a K&N intake and a true duel exhaust. No matter how easy I drive it (70-75mph down the e-way for long distances) all I get is 10 mpg.
 I don't plan on towing anything heavy and I have a 3:73? front end (but will need to find a matching rear) I could put in but would that help? Btw I'm turning about 2000rpm at 55-60 mph. Is there a chip that would really help? I drive almost no city, 99% back country roads (55) and highway (70-75). Any help would be great.
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02-25-2010, 04:02 PM
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#2 |
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Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
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Re: Gear ratio for better fuel econo.
what are you going to max out with 13-14 MPG max? The 35's don't help...
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" |
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02-25-2010, 04:17 PM
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#3 |
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Registered User
Join Date: Apr 2004
Location: carleton,mi
Posts: 45
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Re: Gear ratio for better fuel econo.
But if I drive 20k to 30k a year it will add up. It was sucking just as much gas when I had the 265's on it. It seems to run almost rich at low rpm 700 to 1200 rpm. I never expected 17 or 18, hoped for 13 to 14 since my 06 hd with a 6.0 got 15 to 16, but 10 is just crazy. My fault for buying it I guess.
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