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| Engine Technology From the novices to the pros, talk about engine technology. Moderated by David Vizard, professional engine developer and well-known technical writer. |
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09-20-2007, 11:38 AM
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shorter deck heights
Whats the reason for running a shorter (8.800) deck over the standard ( 8.990 - 9.0 ) deck?
I see more and more running shorter decks. 
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09-20-2007, 01:39 PM
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One reason is the high RPM's that they will turn and making an intake manifold with the correct runner length and a good alignment with the port.
__________________
Stan Weiss / World Wide Enterprises Offering Performance Software Since 1987 http://users.erols.com/srweiss/index.html
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09-22-2007, 07:21 PM
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Thanks Stan, how about you Dave any input? or anyone else?
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09-23-2007, 01:42 AM
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Another reason is you have to run a shorter push rod which will reduce weight
__________________
Stan Weiss / World Wide Enterprises Offering Performance Software Since 1987 http://users.erols.com/srweiss/index.html
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09-23-2007, 02:09 PM
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Going along with the light weight idea, you should be able to build a
lighter piston/rod combination with the shorter deck height.
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09-24-2007, 10:08 PM
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Along with the other things mentioned ...
Lighter overall weight of block and it lowers the weight in the car (ie lower c/g) The shorter pushrods are then stronger/stiffer as well as lighter. For a lower rpm engine you would probably not use a short deck block (for a sbc anyway). The very high rpm Comp type engines seem to be where these things help, especially the runner length and angle that Stan mentioned. Rick PS .. great site 
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