ok im just give some variables and you guys can fill in the blank.
if you have an open chambered head but the piston has a step to act like a closed chambered head wouldn't that give you quench?
Yes. But it is much more difficult to set quench up in that manor. Since the combustion chambers are rough cast and not finished machined, like the quench pad on a closed chamber head, it is much more difficult to get the quench distances equal cylinder to cylinder.
Rumble
First, let's get distance set up. You start to loose the effect of quench when it is greater than .055, or as I'm told.
what area are you measuring the quench from?
Quench is measured from the area opposite the dome or valve reliefs. The "flat" part of the piston to the quench pad of the head. An open chamber head is not considered a quench head since it has no quench pad. Read my response above.
Getting it tighter is a good thing. It does how ever depend on the rod material. A steel forged rod is pretty standard and can get to .035 easy enough.
.035" meaning .035" of head gasket or .035" to the largest volume area of the head? or??
Meaning .035" quench distance. From the flat part of the piston to the quench pad of the head. Yes, quench dome pistons are made and they will turn an open chamber head into a quench head, but it is very difficult to get it right. Again, refer to my first response.
But an aluminum rod will stretch a little more. Take note of the rod manufactures suggested limits.
yea understood the aluminum will stretch more.
this seems to me to be two terms that are either directly related or are the same thing. Rumble whats a minimum piston to head clearance (flat top with flat closed chamber head)??
