W2 Mopar inspection w/RAMM
RAMM, can you try to explain why these heads make so much power? I mean W2s in general, not this particular set.
Rumble did do a fine job of explaining but maybe I can distill it down even further. I know I'm gonna catch some flack for this but here goes.
The major keys to the W2's success in power potential/production is not really what is staring you in the face. I will start with what isn't as important about the W2. What I mean by that is the large port design and mostly removed pushrod pinch. It is the shape and the deep bowls which require a long valve which then allows the fantastic tall short side these heads possess. By shape I am referring to the ovality of the port runner--As we all know small radius sharp corners don't really do much for flow or even valuable cross section. But really it is the deep deep round bowls that you can shape into a venturi--ish shape if you know how to do it. The exhaust ports are also valuable players here and the W2 features an almost straight up and out shot with again an absolutely amazing short side radius. The short side design is by far what allows this head to attain excellent low-mid lift flow rates (which is tied directly to velocity) AND hang on to excellent upper lift flow rates.
In my mind in order of importance for the W2's attributes would be:
1: Shortside radius shape and height--(It's actually too tall but you have a ton to work with to get it right)
2: Bowl depth and shape
3: Exhaust shortside radius
4: Intake port shape (oval)
5: Chamber shape (Closed or open chamber- both work excellent)
It is NOT the large intake opening and awful pushrod angle or the mega offset intake rocker required that makes this head work. In fact I hate the massive side loaded rocker required, but there is no getting around it. That's it in a nutshell and I can share a story that corroborates what I said with something I tried 15-16 years ago. Hope this helps someone. J.Rob
