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Thread: Also BBC 840 head flow data

  1. #1
    Senior Member EXPERT BUILDER
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    Also BBC 840 head flow data

    I have a stock 1969 427BBC. The heads are stock Hi-Perf GM1T,#3919840,square port,2.19int and 1.72ex,closed chamber,106.8 combustion chamber.
    They have never been ported and I want to keep them that way.Does anyone know what they would flow from the factory,int and ext??Have you seen any tests done on them? I can't find any info. on these heads either.
    If a 5 lb hammer can't fix it,it must be electrical
    Keep the shiney side up! 8)
    http://www.racingjunk.com/profile/85221

  2. #2
    Senior Member EXPERT BUILDER
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    ive heard perhaps the best stock iron bbc heads made for racing is the 990 head then the 840...not sure but id say you have a head worth keeping for a good street strip head good luk

  3. #3
    Senior Member EXPERT BUILDER
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    Ya I will be keeping these,I have them on my Blown Pro Street 57' thats in Show Off. But I'm very curious what they flow.
    If a 5 lb hammer can't fix it,it must be electrical
    Keep the shiney side up! 8)
    http://www.racingjunk.com/profile/85221

  4. #4
    Member JUNIOR BUILDER
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    Hello
    There are quite a few BBC heads on here

    http://users.erols.com/srweiss/tablehdc.htm#BBChevy


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