Alpine V6 performance cams
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  1. #1
    Guru davemcbean's Avatar
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    Alpine V6 performance cams

    Does anyone know anything about performance cams for the PRV V6? I think David Cavanagh mentioned once that he can get hold of special Alpine cams.

    Does anyone know the specs of any of the Alpine cams or the R25 standard cams? Figures expressed at 0.050" of lift or off the seat figures would be most useful. Peugeot often express their figures at 0.7mm lift which is difficult to compare with other cams. I have seen figures for the V6 expressed as 9/45 45/9, but am unsure what lift this was measured at.

    Any help, would be most appreciated.

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    Dave
    NZ Fleet
    1976 504 Ti
    1984 205 GT twin carb
    1991 205 SI 1.6GTI motor
    1994 106 Xsi
    1996 Mondeo V6
    Aus Fleet
    1955 203C
    1997 Civic Cxi (great allrounder- revy, flexible, nimble, comfortable , economical, simple and durable )

  2. #2
    Fellow Frogger!
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    The 9/45 & 45/9 are degrees before and after top dead centre, when the cam lifts the valve from its seat. These figures do not relate to the amount of lift produced by the cam.
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  3. #3
    Guru davemcbean's Avatar
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    rick_b:
    The 9/45 & 45/9 are degrees before and after top dead centre, when the cam lifts the valve from its seat. These figures do not relate to the amount of lift produced by the cam.
    Rick,

    I'm well aware of what you're saying, however the timing figures are different depending on whether you measure them as soon as the valve leaves the seat, or when it reaches some othe point (e.g. 0.7mm).

    As an example, the Peugeot 504TI camshaft has timing figures of about 9/45 45/9 measured when the valve is 0.7mm off the seat until it gets back to 0.7mm off the seat, but has timing figures of about 20/60 when the valve is measured from the time it leaves the seat until it rests back on the seat.

    Thanks for your response anyway.

    Dave
    NZ Fleet
    1976 504 Ti
    1984 205 GT twin carb
    1991 205 SI 1.6GTI motor
    1994 106 Xsi
    1996 Mondeo V6
    Aus Fleet
    1955 203C
    1997 Civic Cxi (great allrounder- revy, flexible, nimble, comfortable , economical, simple and durable )

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