Help choosing a cam for a ZZ502
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Help choosing a cam for a ZZ502

  1. #1
    Junior Member ASantos's Avatar
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    Default Help choosing a cam for a ZZ502

    Hi, can anyone recommend a cam for a ZZ502 that I'm putting in my heavy layup 18' Jet Boat(sorry in advance lol)?

    ZZ502 9.6:1
    GM Performance Aluminum Heads 290cc 110cc combustion chamber CNC'd.
    GM Performance CNC'd dual plane intake
    Holley 850DP
    Hardin Marine Logs/Snails
    Haven't decided on impeller, but will test a few different ones. Race prepped B to a AA, not sure yet.

    Hydraulic Roller preferred.
    Thanks, in advance.
    Last edited by ASantos; 05-10-2018 at 02:28 PM.
    1990 Keaton 18J BBC

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    Village Idiot fc-Pilot's Avatar
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    Are you planning of using the factory roller lifters? Springs? What valves? What exhaust? These are all factors that would play into getting the right cam. In my opinion I would contact Chris Straub and have him grind a cam for your specific needs. Every cam I have got from him delivered results better than I would have expected based on my own experience picking cams. Also, he is a great resource for parts if you need them.

    Paul

  4. #3
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by ASantos View Post
    Hi, can anyone recommend a cam for a ZZ502 that I'm putting in my heavy layup 18' Jet Boat(sorry in advance lol)?

    ZZ502 9.6:1
    GM Performance Aluminum Heads 290cc 110cc combustion chamber CNC'd.
    GM Performance CNC'd dual plane intake
    Holley 850DP
    Hardin Marine Logs/Snails
    Haven't decided on impeller, but will test a few different ones. Race prepped B to a AA, not sure yet.

    Hydraulic Roller preferred.
    Thanks, in advance.
    You also really need to decide on impeller (and RPM range) to select the right cam.

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  6. #4
    Junior Member ASantos's Avatar
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    2.25/1.88 SS valves, stock springs, die cast roller rockers 1.7, aftermarket roller lifters. Logs/Snails. Thanks for the help, I'll try Chris as well. Thanks,
    1990 Keaton 18J BBC

  7. #5
    Village Idiot fc-Pilot's Avatar
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    Quote Originally Posted by obnoxious001 View Post
    You also really need to decide on impeller (and RPM range) to select the right cam.
    Great point! Being that I am a v-drive guy I can gear to the RPM I want, but I forget that you jet guys have different limitations to fight.

    Paul

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    Quote Originally Posted by obnoxious001 View Post
    You also really need to decide on impeller (and RPM range) to select the right cam.
    Barry has a GOOD cam grinder..send your cam for a regrind..Straub will cost you $575 for the cam..mine sucked big time

  9. #7
    steelcomp was here
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    Give Chris a call (Straub). He's done a bunch of 502's. His cam's don't suck and neither does his reputation.
    You need to figure on how much power you want to make and what RPM you want to make it.
    Last edited by scott foxwell; 05-11-2018 at 01:10 PM.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  10. #8
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    Quote Originally Posted by scott foxwell View Post
    Give Chris a call (Straub). He's done a bunch of 502's. His cam's don't suck and neither does his reputation.
    You need to figure on how much power you want to make and what RPM you want to make it.
    Spoke with Chris on the phone about my set up.....Nice and informative and will be sending my stuff to them....with no doubts.....

  11. #9
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    Quote Originally Posted by Gone Green View Post
    Barry has a GOOD cam grinder..send your cam for a regrind..Straub will cost you $575 for the cam..mine sucked big time
    If your unhappy with a camshaft then please contact me. 423 391 7774.
    Chris Straub
    Straub Technologies

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

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