I'm planning on splitting the case due ongoing rebuild of the M97.70 engine. I want to insert hardened pins next to the main bearings for case stiffeness. Also a second set of oil jets (squirters), like GT3 engines.

Now I have 2 questions to the folks, who made these modifications in the past.

First is about the hardened pins, what diameter and depth you go for?

And second question is about the oil jets/squirters. What P/N you choosed? Did you leave the Oilpump original from turbo or switched to GT3? I don't see or know the difference in the jets/squirters that are available, maybe some expert can enlighten me on this.

997 Turbo uses:
6x 993 101 018 51

997 GT3 uses:
3.6:
3x 997 101 018 90
3x 997 101 018 91 (this number is in brackets, don't know how to interprent this)

3.8/4.0 uses:
3x 997 101 018 93 (0.8mm as info in brackets)
3x 997 101 018 92 (1.2mm as info in brackets)


all these numbers from GT3 are only available on the left crankcase, nothing listed on the right half of the crankcase.