Well, i bought a rb30/25 combo, partially complete, it apparently had forged pistons in it. Today i popped the head, and im not so sure about the forged pistons.
If i had a camera i would take a pick and post....alas i dont so we need to do it the hard way. (Bummer)
Could someone post up a pic of an Rb30e piston, as i suspect thats what i got.
Desciption of whats there - Best i can manage:
Heres what i would say it looks like side on from inlet side of piston through to exhaust side.
edge of piston, drops down to the dug out sections for the valves (very technical i know!) then steps up to about 2mm(max) above the edge height of the piston, has a flat section, steps back below the edge to the dugout sections for the exhaust side valves.
There is my elite description....prolly easy to post a pic.
Cheers
G