Stuck between cylinder heads

Discussion in 'High Performance Modifications' started by Justin79maro, Sep 11, 2019.

  1. G72Zed

    G72Zed Veteran Member

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    X2^^ Well said, That's why some people are disappointed in their HP and performance results, they go out and actually buy too much cylinder head for what they need, and loose at the top and the bottom of the RPM range. Always good to deal with a pro if it's viable or available, CFM is not everything, and actually down on the list of "importance" in a lot of cases.
     
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  2. 1980RS

    1980RS Veteran Member

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    You are right on that. Most people "DO" buy more cyl than they need, that's ok if you plan to build something bigger in the future but as I just found out recently with the BBC PP heads vs. Closed Chamber heads, bigger is not always better. Same goes goes for intakes and headers. Bigger headers most of the time on a mild build make less power and giant single plane intake while can work in some instances usually don't.
     
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  3. G72Zed

    G72Zed Veteran Member

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    Yep, big CFM sells heads, always has. I still get caught in that sometimes, hard not too. But, been down that road, flow bench hero's, and comes up short on the pump.
     
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  4. 1980RS

    1980RS Veteran Member

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    I will take a smaller port head that flows the same as a larger port and it will kick butt over than big port head. You just have to remember the 375hp 396 they were pigs compared to a 350hp 396. I used to beat up on those big head engines all the time. Right now I have some large port Vortec heads and some 062's that I will port for my new 406 project. Even though the large port heads flow more the 062's ported up to around 6K will kick the large ports butt.
     
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  5. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    Very Happy with my AFR cyl heads !!!!!
     
  6. G72Zed

    G72Zed Veteran Member

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    Yep, you are correct on that. And makes you wonder why some things work, when they shouldn't have, like taking the 396/375 hp Rectangle port intake and bolting it on the 396/350HP oval port heads, and in other BBC Rec. int to Oval port combo's.

    The 396/375hp did not have the CI or RPM to take advantage of the port's design/layout or CFM's.
     
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  7. ZEN357

    ZEN357 Veteran Member

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    I've had really good luck running Edelbrock heads.

    https://www.jegs.com/c/Engines-Comp...964792+900350+4294958194+4294958269&Tab=GROUP
     
  8. 1980RS

    1980RS Veteran Member

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    Here is another example, the LS3 head. 265 CC runner on a 364 ci. in. engine, only drag race or nascar people do stuff like that. Put money on it if you stuck a set of AFR 235 CNC ported cathedral port heads on a 5th gen Camaro it would run low to mid 12's easy.
     
  9. Justin79maro

    Justin79maro Veteran Member

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    Sorry for such a late response, but no I wouldn’t get them milled
     
  10. Justin79maro

    Justin79maro Veteran Member

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    I’d like to get it to a 7.40-7.50 I’m doing suspension work on it this winter too, try and help with the launch some
     

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