« Reply #7 on: January 24, 2012, 10:20:03 pm »
78% isn't that big a deal really. 11.5:1 af is close to ideal at higher rpm.
Work with the timing to get rid of the knock, and see if you can add a couple more psi boost. If its well tuned and everything is working well, thats about it for a big 16g. An Evo 16g will be able to get more out of it, but a big 16g is the least efficient of the commonly availiable 16g turbos.
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