List your MPG on your transplant 5.7 or 6.1

New Hemi Engine Swaps

  1. Map63Vette

    Map63Vette Well-Known Member

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    I just got back from a cruise this weekend and managed 21.5 on my car if the gas tank filled up right. I've swapped to a T56 with a 0.5 overdrive some time ago and have continued to work on my tune. I have an aftermarket tank that never really knows when it's full though, so I'm never sure that I put the same amount of fuel in it each time I fill it since it will kick off auto-fill on most pumps early (like, right after you turn it on early). I ended up doing around 250 miles and change on 11.5 gallons, so I was pretty happy. All highway for the most part. 20 was the magic number I always wanted to hit, so seems it will do that on the highway at least.
     
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    • ghinmi

      ghinmi Well-Known Member

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      Nov 11, 2014
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      On the way to Drag Week I had a couple legs on 87 octane that I got 21 mpg. I ran a 50% ethanol mixture during the week which knocked mileage down some, as well as the 14 quarter mile passes. Still got 15.4 mpg average for the whole trip. Not bad for a mid 10 second Jeep.
       
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