LT1-LT4 Modifications 1993-97 Gen II Small Block V8

dewck height

Old Apr 14, 2010 | 10:36 PM
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Default dewck height

going to be buildng a 355 soon 6 in scat rods -5 mahle power pack pistons
stock crank i think i want some where in the 11:1 Cr with Le2 heads i think they are 58cc afte ported mabee someone can chime in there? do i need to deck the block if so how much? anyone with a build like this whats your CR and deck height?
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Old Apr 14, 2010 | 10:43 PM
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What is dewck height. IT made me think of dukie,like poop.lol Is there anything wrong with your block? Usually they deck the block with that much work being performed.
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Old Apr 14, 2010 | 11:05 PM
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you need to balance compression ratio, and quench distance to figure out your deck height. With chambers that small I am not sure if you are going to be able to get your quench where it should be and still have the compression ration you are looking for with those pistons. .040 is about where you want your quench for a street motor. Usually this is achieved by zero decking the block and using a .039 compressed thickness head gasket. Your situation is different because of the stroke but for example I had to use a -16cc inverted dome piston to get 11.1 compression and a .044 quench on a 383 with 6 inch rods. Like I said you might be able to get away with that piston due to the stroke but you are going to have to crunch the numbers
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Old Apr 14, 2010 | 11:09 PM
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nevermind, I just found a calculator online so it looks like you could either zero deck it and use a .039 head gasket or if you would like to leave some meat on the deck for future repair/mods than I would deck it to .015 and use the .026 Mr. Gasket 5716 head gaskets and that will get you right at 11.1:1

Last edited by JB_97ws6TA; Apr 14, 2010 at 11:14 PM. Reason: wrong gasket
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Old Apr 15, 2010 | 10:34 AM
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That piston was actually made for 3.5 stroke or 3.48 stroke. by using the stock crank at 9" deck height you will be ten thou. in the hole
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Old Apr 15, 2010 | 10:43 AM
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Originally Posted by redtransam95
going to be buildng a 355 soon 6 in scat rods -5 mahle power pack pistons
stock crank i think i want some where in the 11:1 Cr with Le2 heads i think they are 58cc afte ported mabee someone can chime in there? do i need to deck the block if so how much? anyone with a build like this whats your CR and deck height?
The answer in NO you do not need to deck the block if its not damaged. Lloyd will tell you exactly what need to do or what will and wont work.
I have my heads milled .030, MR G 5716 .029 head gaskets and the block was just cleaned up and NOT decked. Pistons sit in the hole about .010-.012
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Old Apr 15, 2010 | 06:00 PM
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what cam are you running
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Old Apr 15, 2010 | 06:53 PM
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Originally Posted by redtransam95
what cam are you running
what cam is who running?
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Old Apr 15, 2010 | 07:37 PM
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ac hotrod was just curious
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