Decking the Block Decking is the process of cutting down the portion of the block to which the cylinder heads mate. This is important for several reasons. First, it is often necessary to remove some material from this part of the block just to “square up” the cylinder heads.
What is deck height on an engine block?
Engine block deck height is the distance from the centerline of the main bearing bore to the flat surface of the block where the heads bolt on.
Is it necessary to deck a block?
Most street motor blocks don’t need decking. As the brains trust says HP is all in the details and the precision. Make sure your engine builder is of the same mind otherwise you will be disappointed in the future.
What is the deck height of a 350 Chevy?
Stock Chevrolet V-8 Block Heights
|Displacement Cubic Inches||Liters||Deck Height (inches)|
Why is zero deck a block?
Zero decking the block IS machining the surface of the block ( where the heads meet the block ) to have zero clearance with the piston at top dead center. Or in commom terms…… the piston is the exact same height as the block when the piston is all the way up. Do this before you bore the block.
What is the best material for an engine block?
The material selected for the engine block is either gray cast iron or aluminum alloy. Both of these metals have good thermal conductivity and fluidity in the molten state.
How much does it cost to deck a block?
Decking the block runs about $180. On the high end we have spent about $640; on the low end, $575. If the block did not need to be align-bored (honed), the cost would be $400 to $460.
Should I deck my head?
Except in cases where they may ALREADY have been decked, during a previous rebuild, or in case the engine was originally BUILT to have a rather high compression ratio, it is generally customary to deck the heads so as to raise the compression ratio, and thus get more horsepower, if the engine is to be used for …
What does it mean to deck heads?
Decking a cylinder head, or block for that matter, involves removing material from the face of said cylinder head. That would reduce the volume of the chamber, hence, raising the compression ratio. It will move the valves closer to the piston. Same with decking the block.
Are 327 and 350 pistons the same?
The bore is the same on a 327 as a 350, the stroke is 3.25 inches and the pistons are different.
What is the stock deck clearance of a 350 Chevy?
As mentioned above, the deck spec. is 9.025″, but some might be 9.030″ or more. Measuring it is the only real way to be sure for your particular block. Also, pistons can vary in compression height. Performance pistons generally have factory spec.
What is the deck height of a big block Chevy?
Standard big-block deck height is 9.800 inches from the crank centerline to the deck surface, and tall-deck blocks like this one measure 10.200 inches.