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  1. #1
    Registered
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    Benefits of a tall deck BBC vs. reg deck BBC ??

    Are there any benefits to running a "tall deck" block compared to a regular deck-assuming everything else is the same-cam, heads, bore and stroke?
    Thanks for your responses!
    Bob G.

  2. #2
    Gold Member Gold Member bcfountain's Avatar
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    blocks

    if you are comparring apples to apples the only thing i can think of is most of the newer tall blocks are newer,heaver and have a higher nickel content in the block,making them alittle tougher and durable.
    just because i dont care doesnt mean i dont understand.

  3. #3
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    29' Fountain Fever/ HP 500 efi, Whipple Stage 1
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    Benefits= More cubes. No replacement for displacement..

  4. #4
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    Tall deck is for generally used for longer strokes to create more displacement. A tall deck is needed so you can run a longer rod to make a more favorable rod to stroke ratio, the lower the ratio the less side loading there will be on the cylinder walls thus reducing wear. being able to run a longer rod will allow the piston to dwell at tdc and bdc longer which helps with evacuating exhaust gasses and intaking more air fuel mixture. You can also run a more favorable compression height on the pistons a bigger compression height which will allow for a more stable piston.

    Either way you have .400" to play with, do with it as you please.

  5. #5
    Charter Member # 55 Charter Member Griff's Avatar
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    If you are talking about building a 540, then you won't see any difference.

  6. #6
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    Thanks for the responses. So I can assume that when I build my 540 (4.5 bore 4.25 stroke) I will get the same power from my current block (regular deck), instead of buying a tall deck. You guys just saved me money!!!
    Bob


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