Bore and sleeve
Has anybody attempted to bore and sleeve an SVX? I plan on strengthening up and refurbing my entire engine over the next year with a goal of eventually running 15-20 lb of boost.
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I was wondering if this will lower the compression ratio...
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In order to decrease compression, the sleeve would have to be thinner than the amount you bore the cylinder out. You start boring that much and you'll probably get into some coolant passages. Doug |
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When a small glass is half empty a big glass of the same height is half empty, but with more beer.;) |
Re: Bore and sleeve
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EDIT: I wasn't actually thinking about boring it first... just putting in a thicker sleeve. |
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compression ratio formula is: (one cylinder swept volume + deck cc + head cc)/(deck cc + head cc) If you are increasing the volume (cylinder swept volume) it will alter the compression ratio. Granted the change will be minimal, but it will change. Doug |
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I agree. If you change volume, CR has to change. Dave |
reducing the swept volume?
Boring and then sleeving the block will change the ratio. But why? You will then need different pistons, so why not use a piston with a lower ratio, and leave the block as it is. Boring and sleeving will leave the block weaker than it is now.
The liners are cast in, they can't move, pressed sleeves can and do. Harvey.;) |
Re: reducing the swept volume?
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:) |
Re: Re: reducing the swept volume?
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I have seen pressed in sleeves, pulled down by the piston, to be smashed be the big end. :( Harvey.;) |
ok i have been wondering for a long time. What exactly is closed deck? i have heard ideas floating around but i want to know for sure. Does this have anything to do w/ the water jacket surounding the entire cylinder? i had my heads off and realized that there is no support for the cylinder walls at the connection to the head.
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a closed deck looks almost like a full block of metal with holes for the cyl and holes for the coolant passage. An open deck is pretty much cyl liners in an empty block of metal. This should help understand: http://legacycentral.org/library/literature/deck.htm
You do have support for the cylinder walls on the horizontal plane, but not on the vertical plane. |
so is there any way for us to convert to closed deck? Is it as simple to make supports without disrupting coolant flow?
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