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sport muffler

Engine

Model: 911 E, Year:1970, Mileage:58,000, Type of use:Both Street & Track
Ed, thanks for your reply on 01/08/12 for the sport muffler modification. I know with this muffler the mixture will have to be set richer, and here is my base set up: 1966 Solex cams; 70.4mm crank; 87.5mm pistons @ 9.5:1 comp; stock 2.2 heads; refurbished stock mfi system. Mostly, the car will be for sportive street driving and maybe some mild track time. The trans gears have been changed to basically 1966 901 gears. My engine builder likes NGK plugs, but could you recommend the plug you would first try for the above set up? All help is appreciated. Walt

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