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  1. #1
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    cam duration too mild?

    spec is : power band 2000-6500 rpm

    duration in:258 ex:248 valve lift in: o.380/964 ex: 0.360/9.14

    cam lift is the same figures as valve lift

    timing open:18-58 close 58-18


    just wondering if these are quite mild cams, the duration up from these which is 264 , is stated as it can not be run on standard injection.

    but the cat/pipers run 264 with the standard injection so is there sumthing else to these cams

  2. #2
    Forum User stan's Avatar
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    yes they are mild. both will be fine on standard managment.

  3. #3
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    264's are generally a good all round cam

  4. #4
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    but will a say 264 piper/264 catcam/264 newman all be the same in terms of performance.

    what bit actually diffrentiates the different types

  5. #5
    Forum User stan's Avatar
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    quite alot....264deg doesnt tell the whole story...you need to compare 0.1mm duration and 1mm duration to gain a better picture of the` overall profile. then you can consider valve opening/closing points...this really defines performance.

    between different manufacturers, there could also be manufacturing differences....

  6. #6
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    on manufacturing differences do you mean the how the cams where made i.e billet/blank /regrinds

    or the actual process involved in making the cams.

    im assuming billet are the best to go for?

  7. #7
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    i havent got the spec of the cat cams , so ill just use the pipers and newmans in comparison.

    pipers : 264, inlet valve lift .390/9.90mm exhaust valve lift .362/9.20mm
    timing inlet 22-62 exhaust 58-18

    newmans: 264 inlet valve lift .420/10.66mm exhaust valve lift .420/10.66
    timing inlet 22-62 exhaust 62-22


    so the newmans is a slightly more aggresive cam?

  8. #8
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    Quote Originally Posted by final abode
    on manufacturing differences do you mean the how the cams where made i.e billet/blank /regrinds

    or the actual process involved in making the cams.

    im assuming billet are the best to go for?
    difficult to say. billet are better but only really needed on wild cams that can,t be ground from a standard blank. blanks are fine for nearly everything. heard some stories about regrinds and problems but thats not always true.

    the best cams are the right spec for your mods and driving style/type

  9. #9
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    Quote Originally Posted by final abode
    i havent got the spec of the cat cams , so ill just use the pipers and newmans in comparison.

    pipers : 264, inlet valve lift .390/9.90mm exhaust valve lift .362/9.20mm
    timing inlet 22-62 exhaust 58-18

    newmans: 264 inlet valve lift .420/10.66mm exhaust valve lift .420/10.66
    timing inlet 22-62 exhaust 62-22


    so the newmans is a slightly more aggresive cam?
    not sure as specs don,t tell you everything but the newmans have more lift so might make better power but thats only one aspect.

  10. #10
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    the newmans looked good to me as they seem more agressive than the piper 264 but not as agressive as the piper 276.

    ive been in jays hybrid running 265 pipers , and i have to say it idles beautiful and is rapid, i just fancy going for sumthing slightly more aggresive with out being too lumpy on idle.


 

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