Difference Between Neo Rb25det And Neo Rb25de Cylinder Head

[aaron1259]

I got a NEO rb25de long motor cheap and was planning to drop the rb25de head onto my neo det block, I am planning to put 260 Poncams and valve springs and titanium retainers into the de.

I know there some differences in the blocks like oil squirters, are the heads the same?

[Ben C34]

Well the cams are different, not sure how that will affect you changing cams.

I'm pretty sure ports are smaller,

Is your head dead? Why swap?

[aaron1259]

The de head is a lot cleaner and newer, the det needs new valve guides and looks really unhealthy, the cam cradles are pretty badly scored.

Would it be better just to reco the det head?

Edited March 17, 2015 by aaron1259

[Ben C34]

Maybe. But seeing as you have both heads you can figure out the differences and report back?

[Dobz]

rb25de neo are much smaller. Nissan wanted to increase airspeed to improve cylinder filling on the de. They can be ported out a fair bit though they can't be ported to the full rb25det port size unless you want to screw around with welding and machining.