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MPG Game

Discussion in 'The Garage' started by bear76, Apr 8, 2006.

  1. bear76

    bear76 1/2 ton status

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    The goal 25mpg mixed driving, some easy trails, beach trips.

    Starting point a 91 k5, 350tbi, power everything, auto trans.,np241, stock running gear 31x10.5 bfg's.

    Speed is not a huge concern but it must be able to keep up with traffic. Diesel, gas both are fine. Perfer to keep the auto trans. I know there will be a few people who suggest getting a Geo, honda or somthing but the K5 is what we have to work with. I feel confident with enough brains working on this it CAN happen.

    Lets begin!
     
  2. NEK5

    NEK5 3/4 ton status Premium Member

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    swap in a 4banga:haha:
     
  3. k20

    k20 3/4 ton status

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    Only way to get near that number is to swap in a 6.2, IMO. Of course, what do I know, Im pickled tink when I get 9.
     
  4. sled_dog

    sled_dog 1 ton status

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    and I feel confident enough that a 6.2L swap is the only direction to even consider, and that for the cost of it you could buy a honda or geo beater to get even better mileage. It may not be cool but I have a Saturn for a driver, it gets 3 times the mileage of my pickup or my old K5 on a bad day(the saturn having a bad day that is).
     
  5. bear76

    bear76 1/2 ton status

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    I already have a Focus but I like to drive the K5. If I could get better MPG I would drive all the time.

    I have concidered the 6.2 as an option, also a 3.9 4bt.
     
  6. Leper

    Leper 1/2 ton status

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    Get a motorcycle or a Honda Insight to go with the Blazer then add the mileages together and divide by 2.
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    6.2 and an OD tranny. Aim to get your cruise rpm (~65 mph) in around 1800. My current combo (6.2, SM 465, 4.56's and 39.5's) gets 16.5 freeway but spins at 2600 rpm. I'm getting close to swapping an NV4500 in and running 37" radials which should get my mileage up to 22 or so on the highway. I'd be tickled with 22...

    Rene
     
  8. mostwanted

    mostwanted 1/2 ton status

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    [​IMG]A Cummins 4cyl. out of a bread truck, or even a regular 6bt. If you drive it like you are trying to save fuel, you could easily achieve 20mpg. I had a 3/4ton extended cab long bed with 35" BFGs that got 18-20. And I drove the piss out of that truck. It was a 24valve cummins with 4.10 gears. The GMC that I helped build get around 20mpg, and that thing hauls a$$.:saweet:

    [​IMG]
     
    Last edited: Apr 8, 2006
  9. tx_sub

    tx_sub 1/2 ton status

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    A 91 4x4 Blazer with 350TBI is EPA rated at 13/16.
    With a 6.2 NA its 16/22.

    You'd have to at least double your mileage to get 25 MPG mixed.

    You could shed some pounds for free: top, doors, truck or no tailgate for starters. Then get creative.

    If you figure it out, you MUST share. We'd all love to have 25MPG lead bricks to drive around. :)
     
  10. muddybuddy

    muddybuddy 3/4 ton status

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    ill most likely be goin to a diesel this summer. im debating bout a 6.2 or 6.5, possibly turbo'n it when funds allow
     
  11. Wishbone

    Wishbone 1/2 ton status

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    As would 99.9% of all the other people here. I love my K5 but it's not my daily driver anymore because of the 7.8 mpg it averages. I have an old beater Honda Accord for daily use.
     
  12. Jishory

    Jishory 1/2 ton status

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    I got worse mileage when i lost all of that highway wise, not sure about in town, probibly could have improved then... i think its worse off as far as aerodynamics goes.
     

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