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    Author Topic: Need help selecting a 6-speed trans and rear end combo for better mpg.  (Read 1897 times)

    Offline brads70

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    Re: Need help selecting a 6-speed trans and rear end combo for better mpg.
    « Reply #15 on: September 19, 2013 - 07:47:44 AM »
    Quote from: KremlinKrusher on September 18, 2013 - 10:57:35 PM
    Well I got it on the road today and it's running well. I'm pulling about 12-12.5 mpg. I I could even squeeze 15-16  mpg out of it it would technically be an improvement from current mpg from my current daily driver.
    In addition to the gearing , I would say your current engine will hold you back. My new engine on the hwy I'm barely pressing the throttle to maintain 65-70 MPH and 17 MPG ...the old motorhome engine I had to use much more "pedal" and it got about 10 MPG. Engine needs to be as efficient as possible to get the best mileage.
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    Brad
    1970 Challenger 451stroker/4L60 auto OD
    Barrie,Ontario,Canada
    Proud to own one of the best cars ever made!!!!!

    My restoration thread 
    http://www.cuda-challenger.com/cc/index.php?topic=59072.0
     My handling upgrade post
    http://www.cuda-challenger.com/cc/index.php?topic=73985.0


    Offline ChallengerHK

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    • I'm working on it - No, really
    Re: Need help selecting a 6-speed trans and rear end combo for better mpg.
    « Reply #16 on: September 19, 2013 - 08:07:00 AM »
    I think you can realistically achieve 15-16 with taller gears, overdrive, a good tune-up and carb rebuild/tune.
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    "She'll make point five past light speed. She may not look like much, but she's got it where it counts, and I've made a lot of special modifications myself."

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    Offline Chryco Psycho

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    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: Need help selecting a 6-speed trans and rear end combo for better mpg.
    « Reply #17 on: September 19, 2013 - 09:13:37 AM »
    As with Brads build the right selectioniof parts in an engine can make a huge difference in the efficiency  , we built one 512 CI stroker getting close to 18 MPG even @ 70-80 MPH on the highway  , tuning also plays a big part .
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    Challenger - You`ll wish You Hadn`t

    Offline KremlinKrusher

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    Re: Need help selecting a 6-speed trans and rear end combo for better mpg.
    « Reply #18 on: September 19, 2013 - 10:15:45 AM »
    Alright i'll have to work on getting the mpg up on the car. Thanks again everyone.
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