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Thread: Rover V8 direction of rotation

  1. #21
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    Quote Originally Posted by DoubleChevron View Post
    Thanks guys,

    interesting. I was thinking, cam, oil pump, waterpump is easy (they seem to be opposite directions Vbelt versus serpentine). starter you could rewire, but wouldn't work if the throwout bearing was splined directionally. alternator can spin either way so isn't an issue.

    The car has a gearbox infront of the motor.... with huge inboard discs mounted to it.



    The driveline is pretty much bullet proof. They used to use the gearboxs from these cars and put them in dragsters .... and they never blew up... The driveshafts and everything is phenomenally strong as all the braking forces are transmitted through them. The massive inboard disc brakes would apply far greater forces to the driveline that an old rover v8 could There has been next to none of these cars ever build re-powered (evne though though could easily do with twice the power) due to the complexities of the task. I do have a rusty parts car sitting under a tree... I just need to drag it out and see if its crank is any good. I'm guessing reversing the direction of the rover v8 will be a very expensive excercise (sadly. It probaby weighs half that of the original motor .... and would have 3 times the power!).

    seeya
    Shane L.

    As a random Idea .....
    It looks like the Diff is mounted at the Front ( Citroen ?), Can you mount the Rover Motor backwards ?
    Obviously you'd still have to cool it etc but maybe ?

    Kiwirich

  2. #22
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    Quote Originally Posted by kiwirich View Post
    As a random Idea .....
    It looks like the Diff is mounted at the Front ( Citroen ?), Can you mount the Rover Motor backwards ?
    Obviously you'd still have to cool it etc but maybe ?

    Kiwirich
    I think the motor would be too big. The car was originally designed to have an air cooled flat 6 mounted infront of the axle as you suggest. Citroen went bankrupt (again ) before they could get the motor reliable enough, so the old cast iron 4banger installed behind the axle (weirdly if you look, they are actually mid engined as the motor is between the axles).

    There is always possibilities. Most are expensive. Citroen owned Maserati at the time so a mirror image of this gearbox was used in the Maserati Merak (and probably a few others). This gearbox would spin the "right" way so you have a useful bunch of foward gears (rather than a bunch of reverses), but obviously "spare" maserati gearboxes aren't readily available that I'm aware of. This would be the simplest option as all I'd need is an adapter plate to bolt up the rover motor

    seeya,
    Shane L.
    Proper cars--
    '92 Range Rover 3.8V8 ... 5spd manual
    '85 Series II CX2500 GTi Turbo I :burnrubber:
    '63 ID19 x 2 :wheelchair:
    '72 DS21 ie 5spd pallas
    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual :zzz:
    '11 Poogoe RCZ HDI 6spd manual

  3. #23
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    What about a Renault 16TS motor.

    Lovely engine and may spin the correct way as the layout is the same as the Citroen.
    Regards PhilipA

  4. #24
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    I presume that same reversed gearbox was used in the Ciroen SM, but that won't help with availability either. Question though - would it be easier to redesign the differential section of the gearbox to put the pinion on the other side of the crown wheel?

    And then there are other complications with putting the Rover engine in - If you remember, the Maserati engine in the SM needed special modifications to the front suspension cylinders and spheres. And that was for the narrow angle Maserati engine, not the 90 degree Rover V8.
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

  5. #25
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    Like Volkswagen,,just turn the diff over.
    easy as.

  6. #26
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    Quote Originally Posted by Modelsp View Post
    Like Volkswagen,,just turn the diff over.
    easy as.
    Actually, looking at the diagram I have, that might actually be possible - although I think the case clearance might be a bit close with the crown wheel on the other side. There may be issues with the gearbox turning backwards, for example with any threads that rely on direction not to undo. But these issues would be less than running a V-8 backwards.
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

  7. #27
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    In all honesty I would get a billet crank made to spec. cheapest and most straightforward solution to your problem and not difficult at all.

    If you wanted to make it complicated you could change the throw and journal size, use different length rods and make a stroker.... not putting ideas in your head or anything.
    Roads?.. Where we're going, we don't need roads...

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    Going sdrawkcab

    Quote Originally Posted by JDNSW View Post
    Actually, looking at the diagram I have, that might actually be possible - although I think the case clearance might be a bit close with the crown wheel on the other side. There may be issues with the gearbox turning backwards, for example with any threads that rely on direction not to undo. But these issues would be less than running a V-8 backwards.
    Like Fredd63 also said, turn the diff over..... In the VW Combi's with the reduction hubs, from the factory, the crown wheel was flipped over to make the axles run in reverse so the reduction hubs turned the wheels in the correct direction. The diff centre mounting was obviously symmetrical so the crown simply ended up on the other side of the pinion.

    Not sure how the Citroens are set up but might be cheaper than reversing the engine, but perhaps not as much of a challenge.

    People have also flipped the entire VW transaxles up side down to mid-mount engines in various cars. Oil pickup is still ok, but the engine is then set lower so your sump is close to the ground.

    Someone else said something to the effect of; sometimes it's not about doing what is easy.... : )

    Keep up posted on your decision and what you discover along the way.

  9. #29
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    The most straightforward would be to do as already suggested - find another engine, or, it is probably possible to find a new crankshaft (provided you have a reasonable ability in French).

    But I don't think the the OP was looking for "straightforward", but rather "interesting".
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

  10. #30
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    Quote Originally Posted by Mercguy View Post
    In all honesty I would get a billet crank made to spec. cheapest and most straightforward solution to your problem and not difficult at all.

    If you wanted to make it complicated you could change the throw and journal size, use different length rods and make a stroker.... not putting ideas in your head or anything.
    Finding a crank means I wouldn't have a nice rumbling v8 in it though ..... But it is what I most probably will end up doing.
    Proper cars--
    '92 Range Rover 3.8V8 ... 5spd manual
    '85 Series II CX2500 GTi Turbo I :burnrubber:
    '63 ID19 x 2 :wheelchair:
    '72 DS21 ie 5spd pallas
    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual :zzz:
    '11 Poogoe RCZ HDI 6spd manual

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