Roller Motors
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Roller Motors

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    Senior Member TNYoungblood's Avatar
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    Default Roller Motors

    Hey guys I was wondering just how much HP gains you would see going with a full roller vs Hydraulic ... And is it worth spending the extra $$$$

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    yes

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    Default rollers

    i disagree if motor is for a boat u will never c over 6500 rpms i run solid lifters and have no problems i would put my money else where
    just my thought on it

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    Horsepower sells Engines lefty's pride's Avatar
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    not much of a motor guy but are you not going to get the gains more in the aggressive lobe your able to run or is what what your talking about for the 6500 or is the 6500 refuring to the rolling resistance gain?
    "Horsepower sells Engines but torque wins races."
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    Senior Member DuaneHTP's Avatar
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    Yes, roller is definitely the way to go in a jet boat engine. Flat tappet lifters, (hydraulic or solid), can not handle the intake lobe ramp speed necessary to get the jet boat engine to perform at its best.

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    Quote Originally Posted by DuaneHTP View Post
    Yes, roller is definitely the way to go in a jet boat engine. Flat tappet lifters, (hydraulic or solid), can not handle the intake lobe ramp speed necessary to get the jet boat engine to perform at its best.
    x2 imo

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    Quote Originally Posted by TNYoungblood View Post
    Hey guys I was wondering just how much HP gains you would see going with a full roller vs Hydraulic ... And is it worth spending the extra $$$$
    OEM's don't use flat tappet lifters anymore, just the aftermarket. The lifter and cam core produced today does not have to go through the PPM testing that they did 10 years ago. Longterm you will be better money ahead with a roller set up.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    Senior Member CK7684's Avatar
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    Quote Originally Posted by DuaneHTP View Post
    Yes, roller is definitely the way to go in a jet boat engine. Flat tappet lifters, (hydraulic or solid), can not handle the intake lobe ramp speed necessary to get the jet boat engine to perform at its best.
    X2...
    A roller can open the valves faster and use less duration which gives better idle quality to a larger camshaft. A roller cam also virtually eliminates break in problems, or problems with the lifter bores being a bit "off" Well worth the extra expense IMO, especially since they arent all that much more when you add it all up...

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