Ok the head casting between the B16a and the b18c5 is the EXACT same, the b18c5 head was NEVER ported, hence why it was let in IT.
This is two times you mention valves floating. And in the second quote you mention your B16a floats them at 8,000rpm.
I have never really heard this before, as 8,000 is the OE red line.
After reading what you ITR makes, there is something going on, either the engine build isn't up to snuff, the dyno tuning needs work, or the dyno just reads low. I'd guess it isn't number 3 though.
We have several 100% stock from honda internally, with intake, DC header, Hondata and exhaust that are making 185whp.
Have you thought about looking to other engine builders? Or even other tuners?
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