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Registered
Join Date: Nov 2004
Posts: 576
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engine built question???
i have a 83sc stock engine in need of a rebuilt....i was talking to a engine rebuilder with a pretty good reputation here in houston who told me basically i could go as far as using the je pistons 95mm with the 10:4:1 cr on my engine and still keep everything the close to the same, namely the cis. but that i would have to use 93 octane as gas. How accurate is this, can this be done?? this is not exactly what says in the dempsey book of engine rebuilding, haaa.....I basically want to increase the hp. in my car overy stock as much as possible and keep the cis, exhaust and emissions are not a concern and changing the cams and pistons were expected expense of course....pls ur input would be appreciated......txks, damian
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07-19-2006, 11:22 AM
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Registered
Join Date: Apr 2003
Location: Maitland, Florida
Posts: 892
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I'd bet you'd get detonation in Houston with a 10.3:1 compression if you didn't twin plug. I'm also guessing that the small ports and intake runners on your existing CIS and heads will limit your top end, even if you use a hotter cam.
Regards, Jerry Kroeger
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82 911SC Targa (05 Boxster S ) gone, but not forgotten 87 Suzuki GSXR-1100 1953 MG TD Mk II |
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07-19-2006, 12:55 PM
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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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Damian,
You want power? Want to keep your CIS? You may be able to get 20/30 hp with pistons and cam. Gears will make it jump at the expense of top end. Real power, freshen up the innards and look into turbo-charging. You may need a different mechanic who is familiar with turbos. You will need to improve the cooling system as well. Might cost a little more, but smiles are guaranteed.
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DOUG '76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's. '85 911 Carrera, stock, just painted, Orient Red |
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07-19-2006, 04:34 PM
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