Are flat top pistons obvious vs dished to tell apart?

Is it a P90 head or a P90A? The P90 heads are sought after because they don't have the hydraulic rocker arm pivots.

With a good light, and maybe a mirror, you might be able to see the flat top of the piston through a spark plug hole, if you find a cylinder with its piston at TDC.

the head has P90 stamped on it, and I just gave it a valve adjustment a couple weeks ago.

could I feel inside with a small screwdriver and feel for a dip?

Edited January 21, 201214 yr by Milenko2121

I would bend a piece of copper wire for a feeler if I was going to stick anything in there. A long piece so it doesn't fall in...

just checked, and they are dished.

this is kind of exciting.

now I need to find out what I need to install the rest of the turbo into my car

This - http://forums.hybridz.org/index.php/topic/38461-240z-260z-280z-turbo-swap-guide/

or this - http://forums.hybridz.org/index.php/topic/50208-the-ultimate-l28et-guidewhat-you-need-for-350whp/

are options. Could get spendy.

thanks, that's a good start for me to read.

and hopefully not too spendy, I'd just like a 6-7psi boost.

I'd just like a 6-7psi boost.

That's what they ALL say.

Bonzi Lon