The cam duration is to small and the LSA is to tight causing a lot of cylinder pressure and on 93 octane it pings. I can not retard the timing enough to stop the pinging. So I mix 2.5 gals of 110-112 octane a tankful to stop the pinging. I was thanking about changing the cam to the Summit 2801. A lot of people like it and may cure my pinging problem since it can relive some pressure in the cylinder with a longer duration. The summit 2801 specs are here. https://www.summitracing.com/parts/sum-k2801.
The valve lift is almost the same. xe262h -.462/.47 vs 2801 - 0.444/.466. If my valve springs were set up for the XE262 would I need to do anything with the valve springs if I installed the 2801? Can I just install the cam and align the timing gears back up?
