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Thread: 434" sbc if I go to afr 245 heads & less comp will

  1. #1
    Senior Member SENIOR BUILDER
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    434" sbc if I go to afr 245 heads & less comp will

    i have a 434" SBC with 14.8 to 1 and AFR 227 ported heads (58cc) car & driver 2420#, if i go to AFR 245cc heads (70cc) and .039 head gasket i will be at 13.3 to 1, my car ran 9.33@145.98 on a 4ths. pro tree deep staging, what i would like to know will i lose et? thanks for you help Doug

  2. #2
    Senior Member RACING JUNKIE
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    nope cause them 245's flow more then your ported heads... so i think even with less comp that you should run a little quicker
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  3. #3
    Senior Member SENIOR BUILDER
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    that is exactly what i wanted to hear, i was told the 235's would be 50 hp better then the 227's, if i bought the 245's i didn't want to slow down. thanks Doug

  4. #4
    Senior Member MASTER BUILDER
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    Re: 434" sbc if I go to afr 245 heads & less comp w

    Quote Originally Posted by bowler
    i have a 434" SBC with 14.8 to 1 and AFR 227 ported heads (58cc) car & driver 2420#, if i go to AFR 245cc heads (70cc) and .039 head gasket i will be at 13.3 to 1, my car ran 9.33@145.98 on a 4ths. pro tree deep staging, what i would like to know will i lose et? thanks for you help Doug
    Make sure your using the spread port exhaust.
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  5. #5
    Senior Member SENIOR BUILDER
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    afr 245 heads

    yes I have spread port heads with Jesel shaft rockers, I called AFR and they are not ready yet (next month) I might be able to use my rockers but would have to buy offset intake rockers, if it is not to expensive I would like to use them. just did not want to slow down. thanks for your info Doug

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