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2014 Cayman S
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Discussion Starter · #1 ·
Does anyone know if the crankshaft journal spacing and diameter is the same between the 3.4, 3.8 compared to 4.0? PET is not available for the 4.0L engine for comparison. I'm hoping they are interchangeable. Porshe is known for shared components between engines. But, so far none of the tech articles I've found discuss this aspect of the two engines specifically. The 4.0 engine has a 81.5mm crank stroke (as does the 3.6 from the 997.2), so it's ideal for a swap, assuming it fits.
 
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