Yep, the hyper pistons are brittle.
Stock the Syclones & Typhoons use the pistons.
Get into desent detonations & they will blow apart very quickly.
I run up to 26 psi in my 100% all original longblock in my Syclone. (This is with hypereutectic stock pistons) Dynoed @ 386 HP & 560 ft lbs of torque @ the wheels. Older turbo & less boost.
You have to have the tune correct, or it will let go very quickly.
The problem I see when guys run forged pistons @ times is the piston to bore clearance needs to be looser & will give some piston slap which will give false knock, and will retard the timing pulled by the E.C.U.
You can run cast or hypereutectic pistons @ low boost levels, but they cannot tolerate much detonation.
Forged pistons can take some more abuse from detonation, but even forged pistons will let go if the engine is detonating & you do not get out of it.
MBHD
