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  1. #1
    rowdog_14's Avatar
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    Upgrading Cam in 4 stroke

    I just installed a new performance cam in my 2004 Dodge ram 5.7 Hemi and was just thinking has anyone ever though about upgrading a cam in a 4 stroke RC engine. Just wondering.....
    THE T.R.U.T.H

  2. #2

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    RE: Upgrading Cam in 4 stroke

    You will have to grind your own.

  3. #3
    jeffie8696's Avatar
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    RE: Upgrading Cam in 4 stroke

    I understand there are some later versions of engines that have a slightly hotter cam that can be retrofitted in early ones but as far as a manufacturer offering a lumpy cam option no Ihave never heard of one.
    Club Saito # 677-Team Boca Bearings-Star Collectibles Muscatine-Glowhead Brotherhood #19

  4. #4

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    RE: Upgrading Cam in 4 stroke

    The cams on modern 4-strokes already have high performance timing.

    I remember someone comparing the timing on Enya engines and it is was akin to competition cams used on car engines.[8D]
    Club Saito member #632
    Once you hear the sound of a multicylinder 4-stroke, you\'\'ll be hooked forever!

  5. #5

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    RE: Upgrading Cam in 4 stroke

    Any engine that makes its peak power at over 5250 rpm is already a high performance engine. Hp in any given size engine is pretty much proportional to the rpm at which it makes
    its peak horsepower. As an example a normally aspirated chevy that makes 300 hp at 5200 would make about 600 to 800hp at 9000. You can see that these model engines are
    pretty hot already. Additionally running methanol and nitro doesn't hurt anything either....can you say top fuel dragster.

  6. #6
    Moderator w8ye's Avatar
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    RE: Upgrading Cam in 4 stroke

    Some years ago, OShad different cams in their 30 and 52 engines for use in cars.

    I put one of these car cams in a OS 52 on a Slow Poke. It runs the same as my other OS 52's
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
    Recipient, Mangledhand award August 2008
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    Original AMA #31261

  7. #7
    rowdog_14's Avatar
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    RE: Upgrading Cam in 4 stroke

    Ok, thanks for the feedback guys
    THE T.R.U.T.H

  8. #8
    jeffie8696's Avatar
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    RE: Upgrading Cam in 4 stroke

    Ihad the same thought when Istarted playing with 4S engines, I am an old Hot Rodder and swapped out a lot of cams. Have you ever played with the Desktop Dyno program its huge fun.
    Club Saito # 677-Team Boca Bearings-Star Collectibles Muscatine-Glowhead Brotherhood #19

  9. #9

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    RE: Upgrading Cam in 4 stroke

    Someone did a how-to for swapping out the cam in the old Saito 45 for a later cam and it worked well. I followed suit with my old 40 and discovered additional issues, but I got it worked out and boy, did it pay off! I got an extra 1000 rpm on a 12x4 prop. Google "Saito heart transplant" and you'll get the original piece.

    But of course the reason is that the old Saito 40/45 had an extremely conservative cam in the first place. As people have said above, any possible gains have probably long since been made by the manufacturers, just as Saito did with the 45S and the 50.

    Jim


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