Hey all, FWIW I decided not to go with the half fill as per my machinist's (and most of every here) recommendation. I called up the fine gentlemen at Hughes who I take it have come across many big power LA builds. Their tech told me he didn't think the half fill would be necessary if I were shooting for around 700fwhp with boost. He told me, as I already knew, that the biggest killer of these engines with high hp/relatively low rpm boosted motors is detonation. I am hoping that with the combination of a front mounted intercooler, E85 and wideband tuned fuel injection that I should have an easier time tuning to keep out of detonation than some other setups.


I should be getting the motor back in the next few days. Still have a lot of work to do but hopefully I'll have this thing running before winter.