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Thread: what gear or trans

  1. #1

    what gear or trans

    I WENT TO TRACK FINALLY.
    MY TRUCK WENT 11.67 @ 115 HAD A 1.65 60 FOOT AND A 7.50 1/8 TH AND CROSSED FINISH LINE AT 6250RPM'S
    SHOULD I KEEP THE POWERGLIDE AND INCREASE THE GEAR RATIO FROM 4.10 WITH A 28 TIRE I LIKE GOING THRU AT 6800 RPM
    OR SHOULD I JUST SLAP A 350TURBO IN IT.
    IM RUNNING A 4200 CONVERTER..
    IVE BEEN TOLD TO KEEP GLIDE I THOUGHT ABOUT SELLING IT IT IS A TCI STREET FIGHTER WITH MANUAL VALVEBODY AND DEEP ALUMINUM PAN WITH SCATTER SHIELD.
    THE ENGINE HAS RAN 1.56 60 FOOTS IN A 77 FIREBIRD IN FRONT OF A TH350.
    IM OPEN FOR IDEAS I JUST WANT TO GET IT TO BREAK INTO THE TENS .
    I HAVE A 5000 ATI LINED UP IF I SELL GLIDE
    THANK YOU

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    635
    Last I checked, both have a 1 to 1 final ratio. Try a 4.56, it will put you about 6900, and converter depends on the engine specs.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.

  3. #3
    Senior Member EXPERT BUILDER
    Join Date
    Aug 2005
    Location
    Tell City, IN
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    356
    I think that 5000 stall behind the glide would work better...

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    Posts
    4,143
    I'd keep the glide and change the rear gear .

  5. #5
    i will probably change gear to a 4.56 and up converter to 5000+. i have a few engine mods in mind for the winter . up compression and step up the cam a bit in duration and lift.
    thanks for the advise

  6. #6
    Senior Member RACING JUNKIE
    Join Date
    Jun 2003
    Location
    Hobbs, NM
    Posts
    842
    I agree with the others on this site, Increase your stall and change your rear gear to a 4.56. Really I think if you increased your tire to 30 inch and your rear gear to a 4.88 would even be better. A taller slick seems to work better if you have the gear to pull it. Remember you make et in the first 330ft. The higher stall and gear should be worth 3 to 4 tenths, and you can probably tune 2 more to get you in the 10s. The turbo 350 does have a lower low gear but its much heavier and robs more hp than a powerglide.
    good luck


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