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Compression and Camshaft


Model: 911, Year:1986, Mileage:25000, Type of use:Both Street & Track
I have a 3.4 turbo motor with a twin plug Electromotive Tec3r engine management system. It is based on a 1986 3.2. It currently has SC cams. As part of a new project I want to modify the motor to a normally aspirated 3.4 using the Tec3r and twin plugs. The motor will be used as a street and DE car so flexibility is important.1. Are the JE pistons the best way to go with my nearly new Mahle cylinders?2. What compression ratio would be most suitable?3. Are the SC cams suitable or should I look to regrind to the "S" or other profile?4. If I have to replace any of the head studs what kind would be best?5. What would be the new red line rpm (turbo ran out of steam at 6,200 rpm so that is where I set the computer) and should I consider changing the valve springs, and if so, to what?Happy New Year.JC

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