Valve timing

[Stuart Giles]

have never knowingly advanced the cam timing, the only car I came across where the cam timing was advanced: mis-matched timing gears "timed" by lining up the dots, had very poor performance.  I always "dial in" the cam and usually set the maximum inlet lift to occur at 110 degrees ATDC -the standard timing- Certainly shouldn't  hurt on a light weight  car with decent breathing to retard the cam by a couple of degrees, I understand from someone who knows a lot more about this stuff than me that it's the late exhaust closing that delivers the top end power increase.