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- Sat Jan 08, 2022 6:24 pm
- Forum: Series 3
- Topic: Compression horespower and engine numbers
- Replies: 20
- Views: 6861
I am new to the group and have a 74 Series 3 V12 OTS LHD that is being restored. I am in the early stages for the engine rebuild and am researching the change to pistons. I currently have the 7.8:1 CR with all the emission controls stuff that will be going away. My initial thought was to simply purc...