mielage difference w/ 4.11
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mielage difference w/ 4.11 How much would my mielage drop with cnanging my stock 3.42, to 4.11s. i have a t-56. just wondering how often I would be filling up. Or would it be better to go with 3.73 for mileage sake or would the performance not be as great. Thanx in advance.
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From: Wilmington, DE
Re: mielage difference w/ 4.11 around town mileage went up 2 mpg on the highway it went down about 2 mpg. With an M-6 mileage should not be a concern I cruise at 70 at less than 2000 RPM and get 26-27 mpg.
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From: Out on the farm in Central IL
Re: mielage difference w/ 4.11 I lost ~11 MPG with 4.11s. That could be because I can't keep my foot out of it though.
Really it didn't change of I drive sane.
Really it didn't change of I drive sane.
Re: mielage difference w/ 4.11 Did heads and cam at the same time so it's hard to really know what caused what.
before 4.10 gears, heads and cam ~ 23.5 to 24.5 mpg
before 4.10 gears, heads and cam best mpg on trip 32.8mpg
before 4.10 gears, heads and cam worst 16 mpg - first tank of gas.
after 4.10 gears, heads and cam average 21-23mpg
after 4.10 gears, heads and cam best 26 mpg
after 4.10 gears, heads and cam worst 16 mpg
~250 mile trip to drag strip with some driving in small towns & 6 passes at the strip 25mpg with gears & H & C
before 4.10 gears, heads and cam ~ 23.5 to 24.5 mpg
before 4.10 gears, heads and cam best mpg on trip 32.8mpg
before 4.10 gears, heads and cam worst 16 mpg - first tank of gas.
after 4.10 gears, heads and cam average 21-23mpg
after 4.10 gears, heads and cam best 26 mpg
after 4.10 gears, heads and cam worst 16 mpg
~250 mile trip to drag strip with some driving in small towns & 6 passes at the strip 25mpg with gears & H & C
