Effects of cam timing on HP+

Does anyone know how tweaking the cam timing can improve HP+.
For instance, my 78SC seems to come on cam at around 3200 would an earlier cam timing give more hp quicker but will it go flat around 6000 ect?
Do ROW 911s have diffrent timing vs US for emission or other reasons?

Cams are designed with a certain timing in mind. You can achieve horspower gains by advancing or retarding a cam. These gains are usually small, say 5 hp. You can also move the torque curve slightly. Advancing the cam for more low end power and retarding for more top end. I have never seen were more than 4 degrees was needed to achive the movement of the torque curve. The 911 cam is run by a very long chain which stretches and moves, you probably get about 1-2 degrees of slop due just to the chain. Gear drives are needed to accomplish and hold small changes in cam timing.

Long winded explanation to say leave it alone. The cam in a 911 does a wonderful job and yours sounds like it is set up correctly.
neil

The experimental 916 engine from, which the famous 908 racing engine was developed, used the same, exact cam profiles as the 906E engine, but the timing was altered to give a power peak at 9000 rpm, and the overall power increase was 10 hp, from 220 to 230. But the penalty was an extremely inflexible, peaky engine which the factory race drivers HATED!!! So, I guess there's a lesson there, if you read between the lines!

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Warren Hall
1973 911S Targa