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Thread: gearing ?

  1. #1
    Senior Member EXPERT BUILDER
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    gearing ?

    i was wondering if i needed to go to 4.56,heres some backround i have a 3200lb 78 malibu with 860 hp 565,180str.cut glide with 4.88,1432 hoosiers, once you guys helped me get the chassis straight the is great,but i think the et is alittle slowin the 1/8. 60' 130 330' 3.87 & 1/8 is 6.04 to 6.05 i justwant to know what you guys thought .thanks john

  2. #2
    Senior Member RACING JUNKIE
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    what mph are you getting?

  3. #3
    Senior Member DYNO OPERATOR
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    I'd say the 4.88's are about right even for 1/4 mile. 4.56's would be more consistent, but will slow you down unless you're spinning now.....1.30 60' isn't bad for a car that heavy

    Johnny

  4. #4
    Senior Member EXPERT BUILDER
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    sorry ops: mph is 113

  5. #5
    Senior Member RACING JUNKIE
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    If your racing 1/8 mile stay with the 4.88s. At 113 mph your only running around 5700 rpms. If you race 1/4 very often I'd probably change to 4.56s, if nothing else to keep from taching to many rpms on the big end. Your 1/4 mile mph should be around 140mph. Your car should set the chassis and hook better with the 4.88s. If you never run 1/4 mile you might try a set of 5.14s, they would really make that Malibu leave hard and probably get you in the 5s. A set of 5.14s would probably have you turning around 6300 rpms in the 1/8. Overall the 4.88s are a pretty good gear for you.

  6. #6
    Senior Member RACING JUNKIE
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    32 X 14 WITH 5.14 GEARS I am about 6800 at the eighth at 110 mph

  7. #7
    Senior Member RACING JUNKIE
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    numbers are fairly close with that gear, i agree with the other guys, if you only run 1/8 a 5.14 could be better, and may drop your 60' time 3 or 4 hun.

  8. #8
    Administrator RACING JUNKIE bjuice's Avatar
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    ..You did not mention the most important factor here..What height tire you running and most important what is the roll out?

    Next don't be fooled by MPH when it comes to trying to get your gear right..a spinning car will MPH more then a hooked car.
    you need to concentrate on what the car is turning in high gear thru the traps.

    also mark your tires and have some video your launch focusing on back tires to see how much spin you got here....i like the video cause i don't trust what other people see or think they see. 8)

    Brian
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  9. #9
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    thanks guy i just thought it might be alittle slow from the 330' to the 1/8 but from what you guys are saying its about right. brian 14/32 hoosiers think the rollout was 105.thanks,john

  10. #10
    Administrator RACING JUNKIE bjuice's Avatar
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    then she is a little taller 14/32 tire...you can get a 100 roll out in the same 14x32 tire which would turn the rpms on up for you if need be...could be an option when you needing new slicks..instead of gear changing

    what are you turning in high gear thru traps ?

    i run a 101 rollout with a 17x33 tire.....very short 33 tire...
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "


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