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Camshaft Upgrade Recommendation

Discussion in 'Intermediate CJ-5/6/7/8' started by Cwelch, Sep 14, 2021.

  1. Sep 18, 2021
    Cwelch

    Cwelch New Member

    Charleston, SC
    Joined:
    Jul 30, 2021
    Messages:
    37
    Correct about the cam specs. They I’m not sure the specs on the springs. Not much info on their website for the kit as far as spring specs. I will have to call to get that. They could be trying to get more money out of me. I’m green when it comes to stuff like this so and have been doing as much research as I can. I’m going to price everything out individually that comes in the kit and see if I could save money going that route. I’m kind of weird about using stuff coming from the same company so if I have issues it’s harder for them to give me the run around about using different parts and blaming it on them. Thanks for all of y’all’s help. It definitely makes it easier.
     
  2. Sep 18, 2021
    Fireball

    Fireball Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Pullman, WA
    Joined:
    Feb 9, 2018
    Messages:
    5,688
    It's not just RPM that determines the springs. Modern cams have much steeper ramps than old ones and you're more likely to loft the valves off the top of the lobes. This can cause float at a lower RPM than you would think depending on the cam.

    Always use the springs recommended by your cam grinder. (or at least ones withe same installed height, seat pressure, rate, and coil bind but it's easier to use the ones they have specifically recommended)
     
    Jw60 and Rich M. like this.
  3. Sep 19, 2021
    Cwelch

    Cwelch New Member

    Charleston, SC
    Joined:
    Jul 30, 2021
    Messages:
    37
    Is it necessary to replace rocker arms when putting in this upgraded cam? I ordered the kit from Lunati that included their suggested springs but they didn’t have any information regarding rockers.
     
  4. Sep 20, 2021
    SFaulken

    SFaulken Active Member

    Bellevue, WA
    Joined:
    May 24, 2011
    Messages:
    1,178
    No, you don't *need* to replace rockers. It's always nice to switch to roller rockers, but for a mild street engine, they're not really necessary.
     
    Fireball likes this.
  5. Sep 20, 2021
    Alan28

    Alan28 Well-Known Member 2022 Sponsor

    Châtillon en...
    Joined:
    Oct 21, 2012
    Messages:
    2,327
    Don't forget to adapt brakes :D and avoid driving fast in curbs... not adapted :lol:
     
    Cwelch likes this.
  6. Sep 21, 2021
    Cwelch

    Cwelch New Member

    Charleston, SC
    Joined:
    Jul 30, 2021
    Messages:
    37
    Thanks for the advice!
     
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