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  •  » Mileage

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    8/11/2013 1:54 PM  #1

    57steve
    FYI Addict

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    From: Troutdale, Or
    Registered: 4/01/2013
    Posts: 114

    Mileage

    So what kind of mileage are you guy's getting from a 289-302 4brl automatic?  Trying to decide if I'm going to switch to a v8.

    66 coupe, Now a 11 year garage ornament.
     

    8/11/2013 3:22 PM  #2

    at
    FYI Addict

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    From: Tampa FL
    Registered: 4/02/2013
    Posts: 275

    Re: Mileage

    Well, for gas mileage, I've got the worst cam, rearend ratio and driving habits you can have. But, when measured in smiles per miles, I have a lot of fun. As in all things in life, it's whatever floats your boat.

    You can lead a horse to water, but you can't get him drunk
     

    8/11/2013 5:32 PM  #3

    Tubo
    2008 BASH V Host

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    From: Ft. Walton Beach, Florida
    Registered: 4/01/2013
    Posts: 1,841

    Re: Mileage

    16-17 with out OD
    w/OD 20-19-+

    If it ain't broke, I haven't modified it Yet
     

    8/11/2013 6:30 PM  #4

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,491

    Re: Mileage

    My 351W with a T5 overdrive trans and 3.70 rear gears got 24 MPG on a 1,000+ mile trip.

    The overdrive tranny is key to making the car liveable on the highway.  You CAN get good gas mileage if you set things up correctly.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    8/11/2013 7:24 PM  #5

    terry
    Senior 24-7 FYI Addict

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    From: vandalia, illinois
    Registered: 4/01/2013
    Posts: 1,882

    Re: Mileage

    with my 65 302 ho with aod im getting 16.  I m thinking I need to rejet that edelbrock 4 bbl, 3:00 rearend

    Last edited by terry (8/11/2013 7:25 PM)

     

    8/12/2013 6:53 AM  #6

    6sally6
    Hyper FYIFORD ADDICT

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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,932

    Re: Mileage

    16/17 on the highway. 5.0+030...World Product heads.... pretty serious roller....T-5(that's the key!) Edelbrock 600cfm and RPM intake... 3.00 gear(that helps mileage too)
    6sally6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    8/12/2013 7:26 AM  #7

    Redvert67
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    From: Coon Rapids, MN
    Registered: 4/01/2013
    Posts: 104

    Re: Mileage

    My stock 289 in my 67 got 17/18 mpg. I added headers, dual exhaust, electronic ignition, an Edelbrock manifold and Holley 4 barrel. That dropped my milage to about 14. But it did run much, much better. After some overheating problems I ended up with an aluminum radiator and a 192 thermostat. It runs at 190 all the time now and my milage went back to 17. I'm running a C4 and 3.00 rear end.

    It's easier to add horsepower than it is to lose weight.
     

    8/12/2013 9:37 AM  #8

    Novi Rick
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    From: Novi, Michigan
    Registered: 4/01/2013
    Posts: 148

    Re: Mileage

    347 stroker w/ Holley 650 double pumper, C4 and 3.40 rear - mileage not to good at approx 12 mpg.  I know that there are some tuning issues that would help improve that number and I will pursue those as soon as I can get around to it.  Until then, it looks like it's a local show car only.  Put a new 180 thermostat and it warms up faster so we'll see what that does for me.

     

    8/12/2013 2:04 PM  #9

    Bullet Bob
    Senior 24-7 FYI Addict

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    From: Montrose, Colorado
    Registered: 4/01/2013
    Posts: 4,923

    Re: Mileage

    65 HT, stock 5.0, EFI, AOD, 3.55.....22 to 24 depending on terrain and cruising speed.  Following Glen B across Wyoming at 85mph dropped it down a bit.

    Last year Corky drove his FB and we had his 71(72?, 73?) Vert with carbed 5.0, AFR heads and a bit of cam...the vert got 20 and I think the FB with 331 and lots of cam did too.  We were running  70-75 all the way from Ft. Walton Beach to Tomball.

    BB

    Last edited by Bullet Bob (8/12/2013 2:09 PM)

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

     

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