Very mild turbo setup (at least compared to what some of you are doing), single turbo, ~5psi, cast crank, hypereutic pistons

what do you think ?

I did a quick search but got 0 results for anything related to hyreutic pistons...

 

I have run up to 12 psi on cast pistons, up to 8 or 9 is safe.

https://www.thirdgen.org/techbb2/sea...der=descending

here is a good one from that list:

https://www.thirdgen.org/techbb2/sho...hreadid=214262

 

I would say no problem as long as you stay away from engine knock.

 

Yeah, detonation is the killer. That means very modest compression and not getting greedy with spark advance if you're going to run pump gas.

I'm running 5 PSI from a roots blower into my 383 with KB Hypers and they've stayed alive for almost 2 years of weekends. My compression is still a bit too high for a roots blower (8.6:1 - I shoulda tanked it down to around 8:1) and I am limited to about 26* of advance at WOT before detonation on pump gas. Over 28* and I start blowing alminum dust off the piston faces due to detonation. I'm currently laying 390 to the rear wheels through an automatic trans.

With a turbo (especially intercooled) you could almost certainly run the same compression as me, more spark advance and make more power than I do while still being less prone to detonation, all else being equal.