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#1
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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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Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#2
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I was wondering if this will lower the compression ratio...
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Danny 1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. |
#4
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Danny 1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. |
#5
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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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1992 LS Touring (6/91) - Currently undergoing a five speed swap Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip 1992 LS Touring (6/91) Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler 1994 LSi (4/93) Bordeaux Pearl; 198,000 miles; Mods: Weight reduction. 1969 Mustang GT Convertible 1970 Mustang Convertible 2000 Ford Excursion Sola lingua bona est lingua mortua. My Locker |
#6
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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.
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Collin 1995 L AWD Locker 1987 Porsche 944 turbo 80k miles. MBC + Chips. Relatively Stock |
#7
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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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-Aaron SVX: '92 Dark Teal 101k '97 Legacy GT Wagon: dead '99 Civic Si: daily driver... stolen and stripped with all my tools! '92 Yamaha FZR 600: garage 2011 Jetta: Daily disappointment |
#8
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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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1992 LS Touring (6/91) - Currently undergoing a five speed swap Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip 1992 LS Touring (6/91) Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler 1994 LSi (4/93) Bordeaux Pearl; 198,000 miles; Mods: Weight reduction. 1969 Mustang GT Convertible 1970 Mustang Convertible 2000 Ford Excursion Sola lingua bona est lingua mortua. My Locker |
#9
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I agree. If you change volume, CR has to change. Dave |
#10
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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.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#11
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Re: reducing the swept volume?
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1992 LS Touring (6/91) - Currently undergoing a five speed swap Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip 1992 LS Touring (6/91) Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler 1994 LSi (4/93) Bordeaux Pearl; 198,000 miles; Mods: Weight reduction. 1969 Mustang GT Convertible 1970 Mustang Convertible 2000 Ford Excursion Sola lingua bona est lingua mortua. My Locker |
#12
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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.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#13
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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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#14
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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. |
#15
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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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