1. roccodart440

    roccodart440 Well-Known Member

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    I can't trap my car anymore with the 4.56's and my new engine so i'm swapping to a 4.10, which should put me through the traps at 124mph @ 6200. I make peak power at 5,900. I'm also swapping in a 4,500 9.5" Coan in place of my Art Carr 3,500, which is way too tight for my new engine. I also make peak tq at 4,500 now.

    Currently I have to trap in OD and am at about 5,200

    Wondering how much diffference i'll notice on the street with the new gears? Also wondering what you guys think i'll see at the strip?
     
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    • CudaFactHackJob

      CudaFactHackJob Well-Known Member

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      At what rpm is your shift completed?
       
    • roccodart440

      roccodart440 Well-Known Member

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      6,200
       
    • mderoy340

      mderoy340 Well-Known Member

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      I went the other way 4.10, 4.30, 4.56 28" tire 200rpm change at cruise with the GVOD. A tenth quicker each gear. 6800 at the stripe in the hot summer air 340/A999 3500 tight TA 10" S-800. I expect to run 7K in good air. I do not use the OD at the track.
       
    • roccodart440

      roccodart440 Well-Known Member

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      Update: The gears are in. Huge difference on the street.

      I can't see trapping it at 7,000 if the engine peaks at 5,900
       
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      • '68cuda416

        '68cuda416 FABO Gold Member FABO Gold Member

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        Good Luck at the track and hope the results are what you are looking for
         
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        • Demonx2

          Demonx2 FABO Gold Member FABO Gold Member

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          Keep us posted! I'm doing the same gear change for the same reasons. Hope to get mine swapped next month.
           
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