We all started with HR heads from a late model 350Z.
Sasha's new engine had significantly more machining for valve buckets that mine and Clark's airflow figures are a tad higher than mine, so I don't expect to get to >500.
We should get close to 500 and I'll be well pleased with 480-490 and over the moon is we do see 500 or 501, but we give away 2mm of stroke and 1.5 points of compression (but we are using E85).
Knowing what is known now, Clark has done done an outstanding job of work with this engine.
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