Cast pistons are not too heavy, they do have metal in the sides, forged pistons will weigh more if they are the same dimensions, cast is porous as compared to a forged piston.
Anyone ever weigh a stock piston? What do those Ross forged pistons weigh Tlowe?
Telling a guy to keep his RPMs in check, remember, this is the same guy that was supposed to keep his boost levels in check, watch for detonation & run premium gas.
First time out, 20+ PSi 87 octane, no intercooler, no boost referenced fuel pressure regulator. Original 5/16 fuel line. All on a used stock cast piston long block.
Did everything I had told him not to do.
Relax, Snowman,,, just making fun.
I am sure the 3rd time around you will be more careful.