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Does any1 know bout diff ratios in vt 5.7l 6spd!!!

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by lmacpherson, Mar 10, 2011.

  1. Mar 10, 2011 #1
    lmacpherson

    lmacpherson Guest

    want to know bout diferant diff ratio and revs. ive run outa people to ask and i cant find anything on the net
     
    lmacpherson, Mar 10, 2011
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  2. Mar 10, 2011 #2
    GEN3RATD

    GEN3RATD 100% Teflon

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    What exactly do you want to know etc. What ratio are you looking at.
     
    GEN3RATD, Mar 10, 2011
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  3. Mar 10, 2011 #3
    immortality

    immortality Can't live without smoky bacon! Staff Member

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    the factory 6spd diff ratio is 3.46:1. and @ 100km/h you should be pulling about 2100rpm in 5th or 1450rpm in 6th. (based on a 235/45/17" tyre profile)

    with 3.7's @ 100km/h, 5th = 2250rpm, 6th = 1550rpm ( i think it's the standard clubsport ratio)

    with 3.9's @ 100km/h, 5th = 2400rpm, 6th = 1600rpm (i think this is the standard GTS ratio)

    with 4.11's @ 100km/h, 5th = 2500rpm, 6th = 1700rpm.

    i think with the factory T56 trans the ideal ratio's are either 3.9's or 4.11's

    all these speeds are approximate allowing for variations in wheel diameters and calibrations of speedo's and tacho's etc
     
    immortality, Mar 10, 2011
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  4. Mar 10, 2011 #4
    lmacpherson

    lmacpherson Guest

    perfect thankyou thats exactly what i wanted to know
     
    lmacpherson, Mar 10, 2011
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  5. Mar 10, 2011 #5
    ryan101

    ryan101 New Member

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    ok, just a quick one then, what would be the perfect diff to swap out the standard 3.46 to the gts diff? would that be a good ratio?
     
    ryan101, Mar 10, 2011
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