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  • 05 Hammer numbers vs fuel economy

    Posted by Jason on December 28, 2022 at 10:15 am


    Hoping you have some advice for me down here in sunny Florida. I have an 05 Hammer with Lloydz TTs, 501 cams, Slashness exhaust(no baffles), PCV, and CC underdrive pulley. I’m not sure what’s going on with my TQ numbers at 2700-3200 rpm. The fuel pump has never been rebuilt, but I’m currently not having issues that I know of during normal riding. The ECM has not been flashed by LLoydz. I’m assuming that will probably help some.

    On another note, my fuel mileage is shit. I do good to get 120 miles before my light comes on. I assume it’s due to the underdrive pulley and the fact that I can’t stay out of the throttle and like to cruise in triple digits

    Any advice is greatly appreciated.


    Jason replied 1 year, 5 months ago 2 Members · 2 Replies
  • 2 Replies
  • Rylan

    December 28, 2022 at 4:55 pm

    A few things.

    1) watch the video:

    and then realize that the 501 cam in that bike isn’t what I would have chosen because it’ll kill the low-end performance (in favor of a high top end).

    And realize that the Lloydz re-program would have been a way to salvage some low-end by adjusting the ignition timing. You’ll have to re-dyno the bike if you decide to do this mod.

    2) You’ve removed the baffles from the bikes which will reduce the torque output at lower rpms.

    3) I only deal in miles per gallon, not miles to tank. If mileage is a huge concern for you then you’ll need to be scientific about your MPG data collection so you can compare to the data from “after” the Power Commander is adjusted to improve mileage.

    Basically, you’ve picked a high-revving set of mods – a big cam, wide open exhaust, then geared down the final drive with an underdrive pulley. It is no surprise the low-end torque took a hit in power and that the bike gets poor mileage because it has to be revved so much to wring the power out of it. It is what it is. Or now you know, and can make changes accordingly.

    • This reply was modified 1 year, 5 months ago by  Rylan.

    Video: 2005-2007 100″ Performance options.

  • Jason

    December 29, 2022 at 9:04 am

    Rylan, you are awesome and I appreciate you taking the time for me, brother. I reckon I’ve got some changes to