Newman cam profiles

[Stuart Giles]

Maximum inlet lift on a standard A7 cam is @ 110° After TDC. Maximum exhaust lift is @ 105° BTDC so the factory cam  is fairly unusual in not being "timed down the middle" e.g. the Newman 20:60:60:20 timing quoted by Speedex in the post above would normally go in with maximum inlet lift @ 110° ATDC which would mean that maximum exhaust lift would be @ 110° BTDC. Running the factory cam slightly retarded does give better top end power but isn't likely to work well in a heavier car.