Anyone running stage 3 LS1 heads on 4" bore or larger?
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I was runninga so called JPR S2 LS6 head on my 427. Who knows what the heads really were though??? I am now going to be running Absolute Speed S3 LS6 heads with bigger valves on both sides. Jay cleaned up/refreshed/ported/polished JPRs old mess. I would have a better idea of how things are in a few weeks.
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Originally Posted by Brian Tooley
We have had a few Stg 2 heads that were on 408+ cu in engines, lets just say they did not break the 440 RWHP mark. Everything that has been in the 500+ RWHP range on motor has been a Stg 3 head.