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Thread: Just dynoed my 396 BBC...how to get more HP?
          
   
   

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  1. #1
    skids72's Avatar
    skids72 is offline CHR Member Visit my Photo Gallery
    Join Date
    Dec 2005
    Location
    Lafayette
    Car Year, Make, Model: 68 Firebird 439 BBC
    Posts
    745

    Calculator says you should see 12.37 @ 108 in the 1/4 mile
    Paint don't make it no faster

  2. #2
    69elko's Avatar
    69elko is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    San Jose
    Car Year, Make, Model: 1969 El Camino SS396 350HP
    Posts
    227

    Thanks. The cranking compression reads at 160psi, I believe I measured that cold. A little low, but still runs great. It's a new motor... The cam is a fairly big solid flat tappet with 240 deg. @ .050. on a 108 LSA. .530 lift. Desktop Dyno's have said this motor to push at least 450HP to upwards of about 500HP and about the same Torque. The Heads have been ported and polished and tested at 271cfm at .500lift @28in. 1.75" primary tubes and 3" collector doug thorley headers. The exhaust is just a set of 3" Purple Horny glasspack mufflers.(They weren't too happy when I brought it in to dyno) Performer RPM Air Gap Intake. 750cfm pumper carb. The jets are 73/82's right now.

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