240z head on 260Z engine

[big rex 2]

Hi Guys,

I have a 240z with a 260z engine.

My car is currently fitted with a 260z E88 head and a fast road cam but the lobes are scored.

I have found a 240z E88 head with a fast road cam... my question is are the heads interchangable between engines ?

I imagine they are the same with the extra displacement for the 2.6 coming from piston size.

Many thanks,

Adam

 

[atomman]

according to this --> http://datsunzgarage.com/heads/

The E88 heads just had larger valve's in the 260z , the smaller valve's in the 240 E88 wont let it breathy as much though


The extra displacement comes from the stroke of the crank, its longer in the 260 engine

 

[morbias]

As the L26 has a longer stroke, I think it would be a good idea to make sure the valves don't interfere with the piston given the 240z head has a different cam fitted. I'm not sure if the max height of the L26 piston is the same as on the L24, I imagine it might be so possibly isn't a problem. If the L26 head was going onto an L24 block then there might be a problem due to the edges of the valves protruding lower.

 

[big rex 2]

Thanks guys,

I think I'll just stick with my original plan off getting a new cam from kent and have my rocker arms
re-finished by piper.

cheers for the swift response

Adam

 

[jonbills]

Early 260z E88 heads also had the small valves.
You could just move the cam & rockers from the 240z head to the 260z head?

I've got a Kent P284 cam in my engine and it goes alright. Which Kent profile are you looking at?