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Thread: afr heads

  1. #1
    Junior Member APPRENTICE
    Join Date
    Feb 2009
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    19

    afr heads

    Im building a 400sbc it .30 over setup for 11-11.5:1 comp turning 6700-7000rpm now i found a good deal on afr heads except there 195cc runner wit 2.05/1.60 would that be too small to feed the 400 or not ive seen decent dyno sheets bringing 560hp at the fylwheel but i want more towards 600 would it be reachable with those heads

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Apr 2008
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    496
    IT DEPENDS ON WHAT SIZE A CAM YOU HAVE ALSO.I HAVE 210 AFR HEADS CNC'ED 208/160 I TWIST 7200RPM OUT OF MY 406.OTHERS ON HERE KNOW MORE IM SURE YOU WILL GET MORE AWNSERS SOON.

  3. #3
    Junior Member JOURNEYMAN
    Join Date
    Jan 2005
    Posts
    27
    AFR and most head mfrs would probably tell you these are too small for your application. AFR suggests 180 runners for 327-350 small blocks and 195 for 383-400 motors, but for street motors. You might be able to get by if the heads are heavily ported. I think they will run out of air on top end. I am running a set of 180 AFRs on a 406 but only because they were on a 355 and my car totalled in a fire. Check out AFR's website. I found their tech line very good. Great heads. Good luck. Mep

  4. #4
    Senior Member MASTER BUILDER
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    Apr 2003
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    Brookings South Dakota
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    244
    If your going to be using a hydraulic roller cam, the 195 heads will be a great fit. The 195 heads are capable of making 600 hp
    Competition Engines & Hardcore Engine Parts
    www.cnc-motorsports.com
    [email protected]

  5. #5
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
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    EastWenatchee,WA
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    887
    Afr heads are damn good, I have 210 cnc heads on a 385 but its drag only
    motor turns 7500 at the traps and its 13.2to1 compression

  6. #6
    Junior Member APPRENTICE
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    Apr 2006
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    New Haven, CT
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    16

    Re: afr heads

    Quote Originally Posted by rhino058
    Im building a 400sbc it .30 over setup for 11-11.5:1 comp turning 6700-7000rpm now i found a good deal on afr heads except there 195cc runner wit 2.05/1.60 would that be too small to feed the 400 or not ive seen decent dyno sheets bringing 560hp at the fylwheel but i want more towards 600 would it be reachable with those heads
    as little as 15 years ago, people were still making a 157cc double 461 ir 041 head casting make that type of power and never see 195cc'slet alone with a 2.05 intake valve thrown in. those heads with the proper cam, intake and carb will run very well

  7. Racing Junk


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