[Shuie]

100mm P&Cs on a 76.4mm crank gives you a 3.6.

I’ve never tried this before so I don’t even know if the pieces would actually fit together.

The stud spacing is different between a 964 3.6 case and the 3.2 case you have so you would need 100mm cylinders designed for the type 930 case. I don’t know the part number or if Andial sells these separate from the P&C set.

Andial lists 3 sets of 100mm P&Cs on their website:

Street 3.5L 9.8:1 part no. AND 103 981 10 (motronic)
Race 3.5L 10.4:1 part no. AND 103 962 12
Race 3.5L 10.3:1 part no. AND 103 962 SP


The 76.4mm rods use a different wristpin also, right? If so, I don’t think you can use the pistons from the above sets. You are going to need 100mm 964 pistons or custom J&E pistons to match the 964 wristpins. I also have no idea what compression ratio you could expect due to the lower volume of SC heads.

It may be worth it to find a source for a custom set of J&E P&Cs if you continue down this path.

Again, I’m not an engine builder. I don’t know if what I just wrote is even possible