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7.4L enhancements

Discussion in 'Chevy Trucks' started by sqdqo, Oct 13, 2011.

  1. sqdqo

    sqdqo Member
    from mqt mi
    Messages: 53

    I just bought an older (2000)Chev K2500 with a 7.4L engine for plowing. Are there any worth while engine enhancements that non-mechanic can do for improvements in fuel economy? I knew before buying it that fuel economy was poor and accept that but just wondering if I can make any easy improvements. Looking for all worth while opinions.
  2. mossman381

    mossman381 2000 Club Member
    Messages: 2,410

    Be very easy on the go pedal :D
  3. rick502

    rick502 Member
    from Vermont
    Messages: 54

    Check usual- air filter, plugs, wires etc first. I have ford with 460 so I feel your pain. Frankly any mods that are easy like exhaust or intake will cost you few hundred bucks or more and only net you a small improvement. If you are only using for plowing I don't think they are worth it. Besides tour mileage probably won't be much worse than a new HD. I still get 12 mpg highway which is as good as my friends with new gas 3/4 tons. Like mossman says just go easy.

    THEGOLDPRO PlowSite Veteran
    Messages: 3,136

    i get 6-7mpg working my 454
  5. rick502

    rick502 Member
    from Vermont
    Messages: 54

    There is a price to be paid with a big block. Love the power though
  6. kevlars

    kevlars Senior Member
    Messages: 407

    Yank the big block out, and drop a 12 Valve Cummins in it!!

    Sorry, I had to say it. But, seriously, I don't know of much you can do to improve the mileage of a big block.


    XXL 4RUNNER Member
    Messages: 34

    i hear good things about black bear pcm tuning, they do them for mileage and power too...........
  8. dieseld

    dieseld Senior Member
    from 90210
    Messages: 634

    I thought blackbear was for 8.1L motors?
  9. MikeRi24

    MikeRi24 Senior Member
    Messages: 563

    I've been doing a lot of driving with my 454 lately. I honestly think its gets better mileage than my 6.0 does. Honestly the best way to conserve fuel is to go very easy on the skinny pedal. You dont need to really put your foot into these trucks to get them moving.
  10. M & MD Lawn

    M & MD Lawn Senior Member
    Messages: 361

    I have a lead foot and man do i pay for it, I have the K&N in mine it gives good sound and performance, how much mileage improvement idk lol.... I will be plowing with mine for the first time this year
  11. 496 BB

    496 BB Senior Member
    Messages: 789

    Black Bear does all GM motors mainly LS motors though.

    Sorry to say but there is not going to be anything you can do to gain significant mileage in that truck or any gas motor truck for that matter. Dont buy the hype on all these programmers and **** cause its all just hype. You can program it for more power but not more mileage....you may pick up 1 mpg if your lucky but your paying more for gas on a hot tune since you have to run 92+ octane.

    If I were you Id throw on a cold air intake and do a tune up and be done with it. If you get 6-7 mpg working it hard Id be happy. I get 6-7 just driving mine around town and I dont even bother checking it while Im towing in town as I know its less. I got a 26 gallon tank and get about 150-170 miles out of it.

    As for the power though...like he said its unsurpassed for a gas motor. Get a diesel if you want mileage.