340 High Compression Pistons
Sorry just noticed your statement , the SRP have 1.804 C/H and the Icons Cuda man mentioned have 1.812 C/H !!!!! What would these be with [ 0.27 MLS gaskets & block decked to 9.565" ] ???
Ooops, DANG, I missed the 1.812 CH on the FHR's; very sorry about that; it looked like a great choice. If you did the .027 gasket and the 9.565" deck height, then these FHR's would pop up only .025" above deck. In that case, there would not be much quench with the piston-to-head gap up at .062". Static CR would be down to 10.6. S
If you could mill the deck to 9.535" (and I DON"T know if that is good or safe so check on that) then SCR would rise to 11.6. You would get your tight quench gap back too. (At a gap of .032" you gotta make sure EVERY dimension on every hole is right!)
I tend to agree on the forged being good for your application. But FWIW, I rallied a Mitsubishi 2.6L with 14 lbs boost for a long time; that was around 65-70 HP per hole. I used both hypers and forged and never had a problem either way, I only had detonation once and corrected it immediately. (I tired to push to 17 lbs boost.... no dice.) If you keep the dimensions right and the engine out of detonation, then the hypers may work for you. Your HP is not going to be super-duper high; I assume you can use race gas.
Other than that, its back to some custom piston, the KB's, or a traditional pop-up. I personally would strive to keep a tight quench gap, which probably nixes the pop-ups and says to use flat-tops; it is a good aid to fighting detonation plus helps combustion efficiency (the 'swirl' concept before 'swirl heads' came out LOL).
