I just looked at your graph again and drew they typical red line for what it should look like. To me it still looks like either you are running out of ignition or the exhaust is restricted. The line shows you should be around 225 at 7000 RPM. The way it simply rolls over is indicative of ignition, plugged flow path or fuel. Your other graph shows that you have 11.4 which is plenty of fuel.
As you can see, you are drawing a pretty good line up to about 5700 RPM and then over it goes.
As you can see, you are drawing a pretty good line up to about 5700 RPM and then over it goes.
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