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PRC LS6 Heads Get A Face Lift!! 225cc Runners!!!

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Old 06-27-2008, 03:24 PM
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Stage 1 heads have 2.00"/1.55" valves. Stage 2.5 gets the 2.02"/1.57". Stage 3 gets 2.08"/1.60".
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Old 06-27-2008, 04:10 PM
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Originally Posted by Matt@Texas-Speed
Stage 1 heads have 2.00"/1.55" valves. Stage 2.5 gets the 2.02"/1.57". Stage 3 gets 2.08"/1.60".
Are all stages of the LS6 heads not a 225cc runner? Still waiting on the flow numbers for the exhaust
Old 06-27-2008, 04:22 PM
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Yes, they are all now 225cc on the intake I'll twist Jason's arm to get us those exhaust numbers ASAP!
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Old 06-27-2008, 05:12 PM
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just for a comparison, what is the runner size of the PRC 2.5 5.3's, since having a smaller runner was there biggest advantage over the LS6's, are they still smaller
Old 06-27-2008, 05:14 PM
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Originally Posted by LT194CamaroZ
just for a comparison, what is the runner size of the PRC 2.5 5.3's, since having a smaller runner was there biggest advantage over the LS6's, are they still smaller
The 5.3's are still a 220cc runner.
Old 06-27-2008, 05:15 PM
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No I have to make up my mind on the stg 1.0 ls6's or the 2.5 ls6's since the runner is smaller now
Old 06-27-2008, 11:43 PM
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Originally Posted by Matt@Texas-Speed
Stage 1 heads have 2.00"/1.55" valves. Stage 2.5 gets the 2.02"/1.57". Stage 3 gets 2.08"/1.60".
Can U get the stage 3 milled to 55cc or will there be problemes with the intake manifold alignment
Old 06-28-2008, 01:50 AM
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Can you guys run the same program on #317 heads? What would that run?
Old 06-28-2008, 10:01 AM
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The 317s cost the same as using the 243/799 castings! I haven't ever seen someone go as crazy as decking to 55cc. I dont know how it fould flow that small, but I'm pretty sure the intake could work.

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