Piston pics please

[geordie]

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

[geordie]

Also stamped on top of the pistons is:

2

(A sircle, prolly dead centre of piston)

67S2

06

Im guessing these are a standard piston/ and not forged....what sort?

[geordie]

Also stamped on top of the pistons is:

2

(A circle, prolly dead centre of piston)

67S2

06

Im guessing these are a standard piston/ and not forged....what sort?

[DAN00H]

do the pistons have 4 cut outs? RB30's only had 2 valves per cyl?

[Duncan]

its not an rb26 piston, they have no cut outs

[geordie]

Yup. 2 cut outs each side, with a raised flat top in the centre.

[SteveL]

do the pistons have 4 cut outs? RB30's only had 2 valves per cyl?

As strange as it seems stock RB30 pistons have 4 valve reliefs (cut-outs) in the head of the pistons.

I have a set of stock factory RB30 pistons and they have '67S2' stamped in the crown - so the pistons geordie has are also stock.

[geordie]

Thank you, stock rb30e's they are then. Good thing the engine was cheap.