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Longer final drive for b16 tranny?

Discussion in 'HYBRID -> ED-EF / DA' started by wagovanb16man, Sep 23, 2007.

  1. wagovanb16man

    wagovanb16man i

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    Alright, so revving at 4000rpm around 70 mph is killing the gas mileage, and I was wondering if I could take a longer final drive and put it into my tranny? Would that help any? I like the sportyness of the tranny I have now, but the final drive is short as hell...

    I believe I have the S1 tranny, at least thats what it says on the gold sticker by the engine ID badge thing..
     
  2. danse

    danse Junior Member

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    I feel your pain, I also have a EF with a turbo B16 setup. I think you mean you have a Y1 tranny which is the JDM B16A trans. You can change the gears but why? if you do that you are just making it into a LS trans if you want the longer gears. I tuned my car with a wide band with the current gears and I get 31 mpg with the short gears cruising at 75 mph. The trick to understand is that it only takes about 15 hp to cruise on the highway so I leaned mine out to an afr of 16 for highway cruising and I am running 880cc injectors by the way so you can get mileage you just have to tune it. Oh and back when I had a D16A6 at 108 hp I would get 34 mpg.
     
  3. K2e2vin

    K2e2vin Senior Member

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    Try swapping in a 4.266 FD from a LS; should help out. If not, swap out the 5th gear for a taller one.
     
  4. Z6CRX

    Z6CRX übber ɐɾuıu etarip

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    Fifth gear swap sounds better since its mostly for cruising.
    A final drive will alter the ratios so you may lose some ability to accelerate through all gears.

    Then again whatever best suits you^_^
     
  5. wagovanb16man

    wagovanb16man i

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    Haha, I was referring to 5th gear when I said final drive.. my bad..
     
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