solid cam vs hydraulic
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solid cam vs hydraulic

  1. #1
    Senior Member 2savage4you's Avatar
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    Default solid cam vs hydraulic

    What are the pro's and con's of a solid cam vs hydraulic.....

    Dont be shy let me have it

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    I'm famous ! Lucky's Avatar
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    Full on race boat = solid or solid Roller
    lake boat - hyd roller or hyd flat tappet
    there are alot of reason why and it depends on your application .
    maintence
    spring pressures
    valve wear



    the only problem with flat tappets anymore is the oils have changed and its harder on the cam ( more prone to go flat )

    Why i have stated hyd roller for a lake boat is cause you get the benifits of the roller grinds with the ease of maintance , Not alot of lake boats are twisting over 6200 - NOTICE LAKE BOATS - before i take a beating ...
    " my carbon footprint is gonna kick your green ass"


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    Cantard 71hallett's Avatar
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    No over 6200 rpm lake boats. Says who?
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    cfm
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    No con's with going solid vs hydraulic flat tappet unless your rpm and hp goal can be met with the hydraulic.

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by Lucky View Post
    the only problem with flat tappets anymore is the oils have changed and its harder on the cam ( more prone to go flat )
    ..
    This just makes you switch to straight synthetic.

    I've been running a pretty stout hydraulic flat since 2004, max of 5,900rpm on nitrous, 150# closed, about 370# open, been washing it in Castrol Syntech since day 1.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
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    Senior Member H20MOFO's Avatar
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    Is it molly rings you don't want to break a motor in with syn. or am I way off? I just lost a whole motor because I didn't go roller. I won't play that game again. Just my .02. Good luck Sav.
    Another Hot Boat refugee

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    Senior Member Deltarat's Avatar
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    Do you want to enjoy your boat or work on it?
    What happens on the Delta stays on the Delta

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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by 468Bahner View Post
    What are the pro's and con's of a solid cam vs hydraulic.....

    Dont be shy let me have it
    Take the best of both worlds ... a hydr roller.

    If it's pure performance you can't beat the soild roller

    What rpm range (upper ) are you shooting for ?

    Sleeper CP

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  11. #9
    Senior Member CK7684's Avatar
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    Depends on the grind...

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    Quote Originally Posted by Deltarat View Post
    Do you want to enjoy your boat or work on it?

    Working on a boat isn't enjoying it.

    I honestly adjust hydraulic cams as much as flat tappet cams, but that's just it only takes a few minutes and I like added piece of paranoid mind

    It's not like if you get a solid you're adjusting it constantly

  13. #11
    I'm famous ! Lucky's Avatar
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    YES and no -- usually if your running a big solid , you should still back your springs off ! Not with a hyd ( except for winter ) which i never do ?

    Quote Originally Posted by Pw_Tony View Post
    Working on a boat isn't enjoying it.

    I honestly adjust hydraulic cams as much as flat tappet cams, but that's just it only takes a few minutes and I like added piece of paranoid mind

    It's not like if you get a solid you're adjusting it constantly
    " my carbon footprint is gonna kick your green ass"


    Quote Originally Posted by 396_Ways_To_Spit View Post
    WOWO!!!!! THat has to be the most beautiful crank that Ive ever seen!!!!!!!!!!!!!!!!


    Quote Originally Posted by MAXIMUS View Post
    He has been allowing me to park my equipment in his backyard for a few years now...
    [/SIGPIC]

  14. #12
    Senior Member MACHINEHEAD1's Avatar
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    I think your engine is worth the $700 upgrade to hyd. roller. Whats that going to be, 5% of the build. I love a good hyd. flat though, like Cranes HMV Powermax/Comp XE lobes. Just a little agressive on the seat for marine apps. However, couple those lobes with Rhodes lifters and say 260 degrees at .050 and you wont see a flatter torque curve between 3000-6000. Now they are availible for Hyd. roller in 2 versions. Cant wait to get a set on the dyno. My experience with Rhoades has led me to running 12-18 more degrees of cam at .050. So now a 266/272 hyd. roller doesnt seem unreasonable for a 500 inch deal. I think I just talked myself into a set for my own 582!

  15. #13
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    Quote Originally Posted by Lucky View Post
    YES and no -- usually if your running a big solid , you should still back your springs off ! Not with a hyd ( except for winter ) which i never do ?
    Not if you are running it a couple of times each month during boating season. Back them off for off season yes. ( Is that what you mean ? )

    For a big soild if you are concerned about backing them off every week, buy better springs. Something like Isky Tool Room.

    And yes I work on our boat all the time and enjoy it. A lot.

    Sleeper CP

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    fast is the other half.
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  16. #14
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Is it molly rings you don't want to break a motor in with syn. or am I way off? I just lost a whole motor because I didn't go roller. I won't play that game again. Just my .02. Good luck Sav.
    I had no trouble, Double moly ringset.

    I do think it took a while to get really good oil controll aranged.
    First year it would burn a quart of oil in a long weekend of running (towing skiiers and tubes mostly).
    Don't know when it settled down, but, 4 years of nothing but Syntech later, has not burned an appreciable drop all summer, nor did it last year.


    The "avoid synthetic at the beginning" is IMO BS, as most of what manufacturers put in cars, is synthetic, right from the factory.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

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