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911sc CIS alternatives

Engine

Vehicle Information: Year: 1980; Body Type: Coupe;

I am not particularly happy with the CIS on my SC. I use the car on track and drive to the tracks - no trailer (6 hours to Summit Point next week!!!). Anyway - I have heard +/- on PMO conversions and know cost is around $4K installed. How about modern injection alternatives? Cost/benefit trades? I do not want to spend in upgrades what a 3.6 liter conversion would cost! Just a note - I have 3 Porsches - the 1980 SC - 96 C2 and 07 Cayman. I find it interesting that the lightest, lowest powered car also gets the worst gas mileage of all of them! Would be nice if the upgrade improved the combustion efficiency as well as mileage. Also, engine was completely rebuilt 1.5 years ago - not much time on it since.

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