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Benefits of a tall deck BBC vs. reg deck BBC ??

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Old 08-23-2010, 01:55 PM
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Default 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.
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Old 08-23-2010, 03:27 PM
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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.
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Old 08-23-2010, 03:44 PM
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Benefits= More cubes. No replacement for displacement..
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Old 08-23-2010, 07:59 PM
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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.
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Old 08-24-2010, 12:37 AM
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If you are talking about building a 540, then you won't see any difference.
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Old 08-24-2010, 08:23 AM
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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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