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Thread: flat tops with 306 duration cam????

  1. #1
    Senior Member SENIOR BUILDER
    Join Date
    Nov 2007
    Location
    indiana
    Posts
    123

    flat tops with 306 duration cam????

    i have a 454 .030 over stock crank and rods fattops and 049 bbc heads wondering if the 11-220-4 comp cam will work for that setup? heads are setup for cam but didn't know about compression ratio??
    if something goes wrong there is always the cooler!!!

  2. #2
    Member CRAFTSMAN
    Join Date
    Dec 2010
    Location
    anchorage alaska
    Posts
    56
    Wallace racing has a dynamic compression ratio calculator, with aluminum heads and pump gas with a good quench you want your dcr to be under 8.5.
    This wouldn't have happened if only you had been paying attention!

  3. #3
    Senior Member SENIOR BUILDER
    Join Date
    May 2006
    Location
    Pikeville KY
    Posts
    109
    I once had a 454 flat top std bore truck engine with a 305H .575-.575 lift cam and it worked great. Engine went 6.90 @ 3600lbs, but I did have a set of 291 cloced chamber heads. Hope this helps.
    OSCA PROSTREET CHAMPION 2006
    4.87@143.50 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00


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