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vr wagon 3:45 diff ratio

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by capitalgainz, Oct 9, 2008.

  1. capitalgainz

    capitalgainz Banned

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    hey just thinking.
    i got a vr wagon acclaim and its straight as schmiky as and its pretty powerful for a v6 prolly the quickest stock vr ive seen
    but to the point
    its stock except :
    corvette servos
    vs s/c cai
    blue top injectors
    k&n pod filter
    sitting on fe2 cop susp
    and has a vr v6 bt1 chip in here (i have a bloke who can right me up a mad tune for 20$ so that might be the go
    but i want more poke so im thinking a 3:45 ratio
    90 bucks for the crown wheel and pnion and 400 too install is it worth it
    and are extractors going to give me more power with stock exhaust and will it bolt straight up to original exhaust
     
  2. 96SEN8R

    96SEN8R New Member

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    Id go a 3.9 diff mate!! If you only go 3.45, you might regret not going shorter. But your price is very low. diffs are built as an assembly with new bearings, shims en the rest and are mated for life. so dont go budget because it will cost you later. If you do a ratio change then your speedo will be out and most ppl leave this, but it makes it look like your car has done more kms then what it has. A new speedo box installed is about 350. If you dont have a free breathing engine, then id say the blue top (24lb) injectors are way to big. stocko 5L come with 15lbs! Id start with a cat back exhaust first then worry bout headers and hiflo cats later. upto you though. hope this has helped a bit..
     
  3. capitalgainz

    capitalgainz Banned

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    cheers man its running a lil harder on fuel but with a larger tb it should settle a little need a bigger fuel pump so i will go a walbro 255lb when mine ****s itself and you reakon go a 3:9 hmmmm maybe i will look into it yeah then extractors then a high flow cat with a standard exhaust minus the rear muffler i will have a sort of cannon but its still gunna flow beeter etc
    but first im dropping the rear another 2 inches
    fix the bent window holding thingo in the drivers door
    then tint windows
     
  4. VSIIBerlinaL67

    VSIIBerlinaL67 New Member

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    get 3.7's ive got them in mine
     
  5. capitalgainz

    capitalgainz Banned

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    what are 3.7 out of they are skyline arent they
     
  6. VSSS_5L

    VSSS_5L New Member

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    What sort of revs would you be doing at 100km's an hour with 3.7's or 3.9's?
     
  7. greenacc

    greenacc Searching for the billion

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    that would rev about 25-30% higher. so about 2600rpm at 100 k's.
    guess its all personal choice and depends what you use the car for. I preffer low revving cars cos its quiet... but i drive long distance
     
  8. VSIIBerlinaL67

    VSIIBerlinaL67 New Member

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    with 3.7 mines at about 2100rpm auto
     

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