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Thread: How much boost

  1. #1
    pro53
    How much boost do you think I can run safely?
    My combo.
    454 bored .040
    steel crank
    7/16 dimple rods
    aries pistons around 7.9 to 1
    6-71 dyers street charger
    rectangular port iron head 2.18 intake 118 cc closed chamber
    2 750 dps
    vertex mag
    block not oringed
    And what kind of head gasket to run?
    Running in a Flatbottom, short burst no superchiller

  2. #2
    ghittner
    What gas?

  3. #3
    pro53
    What gas?
    Pump gas with maybe some octane booster.

  4. #4
    Unchained
    How much boost do you think I can run safely?
    My combo.
    454 bored .040
    steel crank
    7/16 dimple rods
    aries pistons around 7.9 to 1
    6-71 dyers street charger
    rectangular port iron head 2.18 intake 118 cc closed chamber
    2 750 dps
    vertex mag
    block not oringed
    And what kind of head gasket to run?
    Running in a Flatbottom, short burst no superchiller
    I had nearly the same combo several years ago. Dyers blower and Merlin cast iron oval port heads.
    Your limitation will be more how much boost that blower can put out.
    I ran 28% OD and never could get more than 7# or 8#.
    I thrashed that motor for years in a couple different jet boats I had.
    It was really durable. Motor was nothing special. Ran it up to 6500 rpm.
    That's where I really got a long lasting respect for the BBCs durability.

  5. #5
    IMPATIENT 1
    Pump gas with maybe some octane booster.
    be carefull runnin octane boosters pro, they'll sure eat a regulator up at the worst time!

  6. #6
    pro53
    be carefull runnin octane boosters pro, they'll sure eat a regulator up at the worst time!
    Whats it gonna eat up the orings in the regulator?

  7. #7
    Smitty19
    if your going to add something add a % of race gas I used to add 30% with ten pounds even though I was told I could get away with 91 just heard the octane bosters were a bad deal not totaly sure why

  8. #8
    Heatseeker
    Octane boosters are a load of shiat. You might as well pour paint thinner in your tank. Same stuff, only cheaper and without the catchy bottle.
    I mix race gas as stated above. I've been using 30% race/70% pump for four seasons and haven't had a problem yet. Plus it smells good when it burns !
    You're spending considerable $$$ and lots of time building your engine, it's be a real bummer to see you cheap out on the fuel and burn it down!

  9. #9
    IMPATIENT 1
    Whats it gonna eat up the orings in the regulator?
    yep! do what all us budget boaters do, mix super with race fuel, and be conservative with the timing or better yet run a msd btm box, let it worry about your timing

  10. #10
    Warp Factor
    Octane boosters are a load of shiat. You might as well pour paint thinner in your tank.
    TORCO (http://torco.com/content/view/103/40/) octane booster seems to be pretty well respected among the blown Corvette crowd.

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