Milling of a 810 casing W-2 head

mbaird said

@Duane If the open chamber is better for flow why did the later W2 race heads go to a closed chamber ? Or was that just those 2 heads ?

Click to expand...

The chamber in the Indy 360-1 looks more like the open chamber
W2. I guess it's a trade off. The W2 will still make some pretty good power with less compression. I always heard though that compression makes torque. But then you have fuel expenses.