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Thread: a few V8 conversion questions

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    Default a few V8 conversion questions

    I'm thinking about doing a V8 conversion on my VP around the end of this year, as i will finally have some garage space, and i also have a friend who is a retired mechanic, who has offered to help me out. I have a few questions which i was hoping some one could answer for me.

    Are there any parts from my V6 that can be used with a V8, such as power steering pump/resivour, alternator, radiator ect? or are they all completey differnet?

    Also, as far as the wiring goes, is this something that can be done by a novice, or is it best left to a professional? And can i use my existing gearbox, or did V8 use a different gearbox (auto)

    I'm fairly confident in removing and installing the new motor, but is there anything i should be aware of, or some advice before i begin removing/installing

    Thank you to anyone who can help me

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    Quote Originally Posted by HoldenCommodoreVP View Post
    I'm thinking about doing a V8 conversion on my VP around the end of this year, as i will finally have some garage space, and i also have a friend who is a retired mechanic, who has offered to help me out. I have a few questions which i was hoping some one could answer for me.
    Are there any parts from my V6 that can be used with a V8, such as power steering pump/resivour, alternator, radiator ect? or are they all completey differnet?
    if you're going auto to auto you can keep the tailshaft, also you can use your v6 steering rack. all those other bits are different.
    Quote Originally Posted by HoldenCommodoreVP
    Also, as far as the wiring goes, is this something that can be done by a novice, or is it best left to a professional? And can i use my existing gearbox, or did V8 use a different gearbox (auto)
    loom is fairly easy i didn't know where to screw earths onto, but apart from that plugs only go on one fitting. autos used different input shafts v6 to v8, you should get a v8 box
    Quote Originally Posted by HoldenCommodoreVP
    I'm fairly confident in removing and installing the new motor, but is there anything i should be aware of, or some advice before i begin removing/installing.
    it'll cost more than you plan on, mine took ages because i was slow at it. get locktite for everything. there's a fair few threads up. with info on all the bits you'll need.

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    and don't forget the rolling stock for safty man the v6 roll out was not make for the power of a v8 we don't want to read your car has made love to a tree man

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    Thanks for all the replies everyone. I think at this point, my best bet would be to find a suitable motor and box, fit it, then wreck everything i have remaining from the V6, and then go from there.That way i will have a bit more money for any extra bits and pieces i will need. I won't be in any hurry, so i'll have plenty of time to research and find help if i get stuck somewhere.

    Can my exhaust, or any section of it be used? I recently had a 2.5 inch single muffler magnaflow exhaust fitted, which i would have no problem selling, but would good if some, or all of it, could be used..

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    Quote Originally Posted by thedeadwalk View Post
    suspension and camper are diffrent in the v8 models
    Just the front Springs

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    Quote Originally Posted by HoldenCommodoreVP View Post
    Thanks for all the replies everyone. I think at this point, my best bet would be to find a suitable motor and box, fit it, then wreck everything i have remaining from the V6, and then go from there.That way i will have a bit more money for any extra bits and pieces i will need. I won't be in any hurry, so i'll have plenty of time to research and find help if i get stuck somewhere.

    Can my exhaust, or any section of it be used? I recently had a 2.5 inch single muffler magnaflow exhaust fitted, which i would have no problem selling, but would good if some, or all of it, could be used..
    Everything from and including the Cat back will fit straight on

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    i just did this conversion
    you are better to buy a complete wreck for the parts needed.
    parts you can use off your 6
    exuast from cat back-i used my 2.5 redback system
    front brakes - i upgreded to a 1" master though(dont need to have these changes as v8 come out with them)
    front springs-best to change them to v8 ones for new reg as it sags.
    diff can be used but i opted to put a LSD in after a couple months
    tailshaft can be used but i also changed mine for a v8 one
    thing you need for transplant
    v8 k frame
    v8 radiator and shroud
    auto loom if fron vq vn vp(they have a seperate piece)
    v8 engine and t700 auto
    engine loom and ecu
    engine mounts(v8)
    ignition module
    accelerator cable
    all v8 engine bolt on bits( ps/ac/fan )
    power steering lines x 2 (1 is a hp)
    transmision cross member
    1. hpfuel pump and sender unit
    2. 2 x new high pressure v8 fuel lines
    these are if you car is made before july 89
    Last edited by NEDWOB; 08-11-2009 at 02:13 PM.

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    Thanks meanvn, i'll keep my diff unless something happens to it, i have a mini spool in the garage, which i will fit at some stage. It's going into a VP series 2, btw. Thanks for your write up, i will save that, so i can refer back to it at a later stage.

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