Finished up my new heads.. Now on to the bottom end.
01-01-2007, 05:12 PM
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Finished up my new heads.. Now on to the bottom end. These are PRC LS6 stage 2.5 heads, 2.04"/1.575" valves, I bought used from a fellow forum member. I disassembled them, decarboned them, polished out the exhaust ports, smoothed out the CNC mismatch in the intake ports and finished it with 80grit roll(there was a pretty bad mismatch in the runners from where the intake side and combustion side CNC process was set up and left a nice bump), and polished the combustion chambers. I installed new valve seals and hand lapped in the valves to make sure they all had a good seal...Original flow numbers were
Valve Lift Intake flow
.100"______ 74
.200"______ 149
.300"______ 208
.400"______ 259
.500"______ 291
.600"______ 314
.625"______ 317
I may get them reflowed this week for fun...
Either way they flow alot more than my stock heads.. Taking my time on the rest of the motor build and cage install..I will post pics of the motor build as I do it.. 
Valve Lift Intake flow
.100"______ 74
.200"______ 149
.300"______ 208
.400"______ 259
.500"______ 291
.600"______ 314
.625"______ 317
I may get them reflowed this week for fun...
Either way they flow alot more than my stock heads.. Taking my time on the rest of the motor build and cage install..I will post pics of the motor build as I do it.. 
