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[QUOTE=joetiii;3668614]I've got 9.3:1 95mm pistons, PMO 40s, SSI, M&K for a total ouput of 204 HP and 214 lbs. trq. at the flywheel.
The small ports are probably hurting you the most. I also have an M&K muffler and I suspect it is costing some power as well. You have really good torque. You may also be able to run more ignition advance. I'm running 30 degrees total but some of our guys are running more. I don't know what the safe limit is. Our spec class has found that the big port motors have more power even with the stock 8.5 pistons than the small port motors.
-Andy
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72 Carrera RS replica, Spec 911 racer
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