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  1. #1
    Join Date
    Dec 2008
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    132

    Default PRO1 23 245cc CNC Heads

    Will they make power on a SBC 406

  2. #2
    Join Date
    Feb 2015
    Posts
    497

    Default

    Probably not where you can use it. That's a pretty big head for a 406.

  3. #3
    Join Date
    Dec 2008
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    132

    Default

    What do i need to use it on ? A 434 ?

  4. #4
    Join Date
    Feb 2015
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    497

    Default

    Something 427 or bigger and well built. If you are locked into the 406 I'd look for heads in the 215 cc range.

  5. #5
    Join Date
    Dec 2008
    Posts
    132

    Default

    ok Thank's for the info

  6. #6
    Join Date
    May 2007
    Posts
    3,351

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    I have a set of Brodix that cc'd 241 on a 362ci that made 649hp & 529# torque.They may be too big for a 406ci but they run fine on a 362ci.

  7. #7
    Join Date
    Jun 2010
    Location
    Santa Land
    Posts
    551

    Default

    What RPM are you turning?
    My sarcasm is a pre-emptive strike to your stupidity!!

  8. #8
    Join Date
    Dec 2008
    Posts
    132

    Default

    Looking to turn 7500 to 8000.

  9. #9
    Join Date
    Dec 2008
    Posts
    132

    Default

    This is a new build and have never have used these heads b4. So that's why i'm looking for info

  10. #10
    Join Date
    Feb 2015
    Posts
    497

    Default

    I stand by my original answer that they're too big. You've been on here for over two years asking for thoughts on heads that 99% of the people who have answered you keep saying too big. Suggest you listen to the majority since you obviously aren't an experienced builder as most of the ones who answer you are. Good luck.

  11. #11
    Join Date
    May 2007
    Posts
    3,351

    Default

    Any size head can be made to work if you know what you are doing.Nascar makes heads that are over 300cc work on a 358ci.Just takes all the right parts to go with the heads.

  12. #12
    Join Date
    May 2007
    Location
    Kansas
    Posts
    1,449

    Default

    CC's is a bad way to measure or compare heads unless the valve angle and port length are basically the same. What you are looking for is pinch area, that tells you more about the head volume then CC's will.

    Take a typical 23 degree head and 230 is reasonable mid to larger sized head, but take a SB2.2 head and a smaller ones is 280 CC's so it appears the SB2 head is large but it's because the ports are so long they have more CC's but may be a smaller cross section/pinch area.

    Most of you new heads are listed with pinch area instead of CC?s, that's why. Not an expert here but if the 23 degree is a raised port the port may be longer then a typical 23 degree head and thus more CC's for the same width/pinch as a non/slight raised 230CC head

  13. #13
    Join Date
    Oct 2017
    Posts
    824

    Default

    Quote Originally Posted by perfconn View Post
    Any size head can be made to work if you know what you are doing.Nascar makes heads that are over 300cc work on a 358ci.Just takes all the right parts to go with the heads.
    They also turn 9000+ rpm. Might be going out on a limb here but anyone asking about heads on a forum likely doesn't have the budget to build a 9000+rpm 358

  14. #14
    Join Date
    Dec 2008
    Posts
    132

    Default

    I stand by my original answer that they're too big. You've been on here for over two years asking for thoughts on heads that 99% of the people who have answered you keep saying too big. Suggest you listen to the majority since you obviously aren't an experienced builder as most of the ones who answer you are. Good luck.

    Well 4T Went back 4 years asking about these heads. Guess what.... YOUR WRONG. Ask once about the 383, 388 1 year ago but never ask about the 406. Good Luck to u.

  15. #15
    Join Date
    Dec 2008
    Posts
    132

    Default

    I Love this Sh%t

  16. #16
    Join Date
    Dec 2008
    Location
    thedirtysouth
    Posts
    3,231

    Default

    Quote Originally Posted by badfast47 View Post
    Will they make power on a SBC 406
    i will take a shot , yes they will , thing is you never stated where you want to make power , just a general question so my answer is general as well , maybe you can get perfcon to post that cam shaft specs he had in that 362 , i would like to see them as well......

  17. #17
    Join Date
    May 2007
    Posts
    3,351

    Default

    Intake-256*@ .050
    Exhaust-266* @ .050
    Ground on 106*-installed on 101.5
    Using 1.90-1.80 rockers
    It's perfconn.perfcon is just another troll.
    Last edited by perfconn; 04-23-2020 at 06:35 PM.

  18. #18
    Join Date
    Dec 2008
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    thedirtysouth
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    sorry about that , ive never payed any attention , any way , installed on 101.5 ? where does that engines torque curve peak ?

  19. #19
    Join Date
    May 2007
    Posts
    2,730

    Default

    He never did say what fuel he plans to run, or did i miss that?

    Whats max piston speed for a 406, 8800 or better?

    Maybe the OP can post that, what fuel and or octane? and what kind of parts etc, quality.

    Just like a lot of the post on here, its really dependent on what the engine is. A top tier 406 on alky, or a low budget build on 110 gas. Its gonna vary greatly.

    An example, we had an old SLM Engine, 430, 4 inch stroke, that was built wrong, and we had to twist to 9200 to get it to "run" it had good USA parts in it, but that is not the best idea to do. We backed it off for years but always struggled with it because of that. So doing it right the 1st time pays dividends.

    Just say no...

  20. #20
    Join Date
    May 2007
    Posts
    3,351

    Default

    649hp @ 7100rpm
    529# torque @ 5600rpm

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