I have a USDM H22a1 making 184 whp and 144 wtq right now. I came across a Euro-R/Type-S cylinder. Wondering if it would be worth swapping it over to the USDM bottom end with a Stage 2 cam?

 

Pretty sure the head is the same, just different cams.

 

PDE heads have a different valve angle, they might have a slight port job from the factory but that part I'm unsure.

 

My 2001 Prelude SE has a PDE head stock from the factory.

Are you sure the PDE head is the Euro-R/Type-S?

 

There are differences in the red top and US heads but pretty sure the valve angle is the same, also has a different lost motion assembly but your US head definitely doesn't have any sort of port job done to it.

 

This is true. They have different valve angles and a factory port job like the ITR's& CTR's.

 

The one I have is a JDM Euro-R cylinder head. It came off my Euro-R bottom end.

 

i'm sure the valve angle is the same, the seats have a different angle cut, they have type s cams and a factory port job.

 

Ok so with that being said. Will the factory port job in combination with a stronger aftermarket cam in the Euro-R head benefit my usdm bottom end? I'm trying to see if anyone has done a swap like this already and if the gains are worth the swap.