ok been researching the closed vs open chamber situation.
In general this is what I've learned:
1. open chamber heads typically flow more cfm 2. open chamber heads are typically lower compression 3. closed chamber heads typically flow less cfm 4. closed chamber heads are typically higher compression
that's probably stating the obvious at this point
It seems, in general, the closed chamber head (various makes/motors) is typically regarded as a performance head even at the sacrifice of head flow.
My question is why?
Quench; as I understand it, this is a desirable relationship and something that can be optimized in several ways to introduce swirl within the combustion chamber.
Using the 194 head on a 250, taking the intake valve shrouding out of the equations for a second, is it wrong to say in a stock 250 shortblock configuration, when the piston is at TDC, it is actually in the hole(i.e. not flush with cylinder deck height)whatever that amount is. Now using the typical FEL-PRO replacement gasket, would the closed chamber head would be desirable?
I guess my point is, is it possible to mitigate the short comings of the 194 head (the two I know of are the intake valve shrouding and cylinder bore size) so that I can take advantage of both the increase in compression and swirl effect? or am I just not understanding what's going on?
