Rod bolt size
 

What is the 1978 3.3 turbo, rod bolt diameter, 10mm or 9mm, Wayne's book calls out 10mm (doesn't specify turbo)and the Porsche turbo manual calls out 10mm. However, ARP shows 9mm?
TIA
KM

Same as the 3.2 Carerra - 9mm.

Thanks Dave

3.0 turbo is 10mm I believe, and 3.3 is 9mm as Dave said

I too just recently had the same dilema, I first bought ARP 10mm bolts only to find out that I needed 9mm for my 3.2L Carrera rebuild project. ARP was not sure which one I needed so they suggested engine teardown and measuring. Wayne's book is correct, in 1984 on 3.2l engines Porsche went back to the 9mm rod bolt. Good luck.

Alex