260Z spec E88 head?

[Xnke]

I have one, with the fully open chamber and large exhaust valve. it is in very very good clean condition, with the intake ports opened up a little to match the gasket. It has a Crane Cams DA-262 cam in it, and had flat tops with valve reliefs cut into them. It has been shaved 0.030", as judged by the shims under the cam towers. The cam has been broken in, but just, as the engine had a header on it that hadn't even had a chance to burn all the paint off...maybe 1 year of driving? This head was used with a triple mikuni setup, and had a 0.6mm fel-pro hard headgasket. When I got the engine, the headgasket was blown on #6, but the engine ran.

 

Unfortunately, two of the water jacket holes are eroded,

and it is the FULLY open chamber, i.e., it looks like the N33 cylinder head in the Sticky thread, not like an N42 or E30.

 

ALL the reading I can find on the open chamber heads deals with the N42 styled chamber, and how it has a reputation for pinging when used with flat-top pistons. I plan to drive on the street as my daily, at least for a while until i find another car to drive that's as much fun, then this will become a street beast/track car.

 

I'm trying to figure out all the Bugaboos that could be hiding in this cylinder head, so I don't waste time and money. If the head CC's at a reasonable size, turbocharging is not totally out of the picture, but probably not going to happen immediately, I'm a carburetor kind of guy.

 

What kind of applications would a cylinder head that has been worked like this have? Can I hope to evade pinging on a 9cc dish piston at 9:1-9.5:1 compression? Is it even worth using at all?

 

I know that OTM was using one at 9:1 compression with no ping, but would he be the exception or the general rule? I know we have covered cylinder heads to death, but this one seems to be the redheaded stepchild of them all.