Advice on merc 600sc upgrades
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Advice on merc 600sc upgrades

  1. #1
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    Default Advice on merc 600sc upgrades

    I have a Merc 600SC (502 GenV) that I added a hyd.roller cam, chiller and 750CFM carbs. Guessing 725-750 HP. Dropped a valve seat and hammered the piston tops. No other damage. Time for upgrade. I was thinking of a 540 kit and aluminium heads. Any head (brand and runner size)and cam recommendations (currently running 610I, 632E lift 236I 244 E duration @50) Currently running B&M 420. I wanted to reatain as much as I had, so I didnt have to reconfigure any lines, linkages etc. I am looking for 850+ HP Thanks for any advice.

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  3. #2
    BTC cardcarrying member SuperSoaker's Avatar
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    502 Gen VI
    Thats why you had a cam plate and not a button and a 6 bolt cover

    If you go Alum heads get the coated ones as you run in a lot of SALT water.

  4. #3
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    Quote Originally Posted by SuperSoaker View Post
    502 Gen VI
    Thats why you had a cam plate and not a button and a 6 bolt cover
    I guess I dont even know what the hell I got Thanks for the correction.
    Now I get it, Why fat Rat was reading the mark 4 backwards

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    Blown Daytona,


    The motors in my Advantage started same as yours. GenVI SC600's. They have had the cams changed, Superchillers installed, PFM blower drives, and are making 10psi. The motors make 800hp now and run on 91 Octane. They have been bulletproof, and are 100% turn key every time out. Just something to think about. I have around 160hrs on them.

    PS the fuel system has been upgraded with an aeromotive electric pump and regulator added to the mech pump..


    Darrell.
    San Diego.

    28ft Sportcat
    With Twins

  7. #5
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    DMOORE, I had 285 on mine. Also turn key dependable until I dropped a valve seat on engine start Teage also sold me dual fuel pump system. Since motor is apart just looking for alittle extra. I have decided to just fix the short block and looking for a nice set of aluminium heads. Possible different cam if anyone has any recommendations. Shame I had the failure because all the bearings looked like new after I disassembled it. This thing could have easily gone 600hrs.

  8. #6
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    Yea, it sucks for sure when something out of the blue happens like that. THe heads are not known for dropping seats. I think the next step in performance from where you are at, would be a blower upgrade. The 420 is basically an 871, so going to a 1071, or even a whipple would take you to the next level for sure. Used 420 setups go for a couple grand, so that would help offset the cost of a 1071 setup. All in all, these are damn good motors . BTW I'm guessing your motor is a 98, I think that is the only year they made the GenVI version, but I haven't been able to verify that for sure.

    Darrell.
    San Diego.

    28ft Sportcat
    With Twins

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