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Greasey Harley · 10-14-2018, 03:31 AM

What mileage are you averaging right now?
What would you consider an acceptable increase in MPG?
How much are you willing to spend, to achieve this increase?
What speed are you trying to run, and what RPM are you running at that speed?
What gears do you have?
How tall are your tires?
Is this a 1/2 ton, 3/4, 1 ton?
2wd, I assume?
What Carburetor or FI system are you running?
Points or HEI
Is this thing properly tuned?
Are you sure you need OD?
Would taller gears and/or some tuning get you close enough?
A properly tuned 454 will twist some pretty tall gears.

Keep your expectations low. It ain't EVER gonna get great mileage.

10-14-2018, 03:31 AM	#13
Greasey Harley Registered User Join Date: May 2013 Location: Post Falls, ID Posts: 884	Re: 700r4 or TH400 with gear splitter? What mileage are you averaging right now? What would you consider an acceptable increase in MPG? How much are you willing to spend, to achieve this increase? What speed are you trying to run, and what RPM are you running at that speed? What gears do you have? How tall are your tires? Is this a 1/2 ton, 3/4, 1 ton? 2wd, I assume? What Carburetor or FI system are you running? Points or HEI Is this thing properly tuned? Are you sure you need OD? Would taller gears and/or some tuning get you close enough? A properly tuned 454 will twist some pretty tall gears. Keep your expectations low. It ain't EVER gonna get great mileage. Last edited by Greasey Harley; 10-14-2018 at 04:07 AM.