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  1. #1
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    Default Hydraulic Roller Cam selection

    Hi all, sorry to ask this question as I know itís been done a million times but all the searches Iíve done over the last few hours keep coming up in older threads and the cams are no longer available.

    So I have a 355 in the build, TP highrise, 10.5 comp, alloy VN style COME heads, 3.5 diff, manual. 1.65 YT
    I want to go hydraulic roller camand have been recommended the Crane 286 but havenít heard many good things about it not to mention is sounds a little sedate.
    I want to my Torry to have reasonable street manners with good power and tough sound.

    Thanks in advance 🙏🏽

  2. #2
    Do you ever leave? paulzig's Avatar
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    The 286 isnt a hydraulic roller its a hydraulic flat tappet..

    If you wanted a hydraulic roller you can get customs done from comp cams, that is the cheapest. You wont get too much rumble and still have street manners, but you could do like a 228/240 on a 109LSA picking lobes from the comp cams master lobe list..

    Hydraulic rollers do get expensive by the time you get cam on a quality billet core, lifters and springs

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    That doesnít give me a lot of faith in my engine guy if heís recommending the 286 then.
    The engine is already setup as a roller and fitted with a cam that is apparently not suitable. Itís a custom Crane, unsure of specs, Iím waiting on them.
    What about the Camtec CT2248 49903?

  4. #4
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    Hi
    I always compare duration specs to a similar engine with known results
    eg 350chev with breathing ability of either double hump heads or standard vortecs
    The cam application needs appropriate compression
    LSA depends on what you want lotsa pros and cons
    Always as much lift as possible
    Cam ramps the quicker the harder on valve train parts

    A hyd roller will always have more breathing in the middle to upper rpm because the ramp rates are quicker than hyd flat tappet cam. Look for dyno tests that go head to head .


    From what I have seen peak hp will be early 6000`s eg 6000-6500 Others might confirm this

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    Do you ever leave? paulzig's Avatar
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    The Crane 286 Hydraulic flat tappet is the 'go to' cam for a lot of the old school Holden guys lol ...

    In a hydraulic roller with VN heads, and I assume a single plane high rise since you said TP highrise, if its a dual plane it will RPM less but a 228-230 HR lobe will peak around 6000RPM LSA depends on what you want the valve open and close to be, lift around .550-.600 ...

    Another option is a solid flat tappet around 235-240... You'll be around 450-500HP most of the time

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    Do you ever leave? EH179's Avatar
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    Quote Originally Posted by LH8VD69 View Post
    That doesn’t give me a lot of faith in my engine guy if he’s recommending the 286 then.
    The engine is already setup as a roller and fitted with a cam that is apparently not suitable. It’s a custom Crane, unsure of specs, I’m waiting on them.
    What about the Camtec CT2248 49903?
    That cam will work fine, but will run out of puff early and not have the lope your after.

    If you want flat tappet and a nice sound, the Crane F280 or equivalent will work well with what you have.

    If you are set on a Hyd' Roller, talk to a cam designer like Camtech and see what they can do.

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    Do you ever leave? immortality's Avatar
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    Probably pay to figure out what you have first, it may be usable or reground to suit if to big.

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    Quote Originally Posted by LH8VD69 View Post
    What about the Camtec CT2248 49903?
    yeah something like that will work... I like stuff with more exhaust duration on everything, but most people seem to frown on it for some reason..

    I can tell you now though, I've heard cams like that in cars, and it will have a nice idle, it wont sound like a monster flat tappet but who cares it'll pull hard to 6 grand +..

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    id run something around 234in and 240ex @050, 580 lift and 108 lobe sep, theres so much more to life than a 286 crane some people are stuck in the dark ages lol

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    Maybe try the crow cam recommendation, i had similar specs to yours and was recommended the crow 51315, it has 238/244, 570 lift and 108 LSA.

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    Part of the furniture Deuce.'s Avatar
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    Quote Originally Posted by paulzig View Post
    yeah something like that will work... I like stuff with more exhaust duration on everything, but most people seem to frown on it for some reason..
    That's always one of my rules. Intake duration plus around 10į for exhaust duration.
    One other rule is matching intake closing to compression ratio.

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    Quote Originally Posted by Deuce. View Post
    That's always one of my rules. Intake duration plus around 10į for exhaust duration.
    One other rule is matching intake closing to compression ratio.
    16-24 extra lol

  13. #13
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    Default Hydraulic Roller Cam selection

    A mate of mine has this Crane Cam hydraulic roller in a 355 with 11 to 1 compression (VN heads) . It has a pretty good cammy note without being too obnoxious. Not my pick of cams but he is pretty happy with it and it goes well.

    Last edited by 46Crab; 24-04-2019 at 05:05 PM.

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    This cam seems like it may suit although itís the Crow 41315 For the later heads.
    The specs seems to streetable for a manual. I think better suited to a 3.7 diff though. I have 3.5
    Last edited by LH8VD69; 24-04-2019 at 05:09 PM. Reason: Wrong information

  15. #15
    Part of the furniture Deuce.'s Avatar
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    Quote Originally Posted by paulzig View Post
    16-24 extra lol
    Comp cams thumpr series

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