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All of you are correct. If our engine survives a couple (2) of race weekends we consider it a good motor. We run the Pauter long rods, FAT counter weighted crank, J&E forged pistons of our own design (total weight 440grams and 13:1 compression), a REED cam of our own design, 48mm Webers (just made legal), 48mm intake and 38mm exhaust valves, springs with 130 lbs seat pressure,and large tube header. We are about to go with titanium valves to further reduce the recipricating mass. We are also working on an aluminum flywheel and clutch package. The prototype is complete and ready for testing.
We go to great lenghts to get increased flow for racing purposes, we race against 240sx nissans, toyota celicas with multivalve engines. The stock motor if I recall correctly really stops producing power around 5000 RPM. Unless you enjoy working on motors I wouldn't try much more. This is our hobby and we do enjoy working on these things. Hope this has given some insight to 8000 RPM.
neil
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