74 911S w/40IDA on T Cams

[roblav]

I once built a 2.7 into an RS... so, I know about that! But, are 1972 T cams on US 8.5:1 pistons doable? My engine seems to have this combo.

[Flat6pac]

Yes, the original 2.4 T motor was 8.0/1 cr
The US 8.5 depends on the face of the piston
The wave piston probably can’t take the early T cam but the
CIS T cam @ .9 mm can work
T cams changed with the 2.4 CIS T
Bruce

[roblav]

Thanks Bruce... this seems to be T MFI cams on 1974 2.7 8.5:1 wave pistons, which seems unlikely. I'll take the top end apart.