12-09-2018, 09:24 AM
I found decades ago that alloy Seven heads were quite common but had invariably been repeat refaced to some ludicrous c.r.
Comparison one with another really needs to be based on the same c.r. a small difference is significant.
For Sevens and other svs, many variants of the basic Ricardo patent style (as 1937) head are aimed not just at good flow but also at moderating the squish, associated burning rate, and consequent harshness.
Comparison one with another really needs to be based on the same c.r. a small difference is significant.
For Sevens and other svs, many variants of the basic Ricardo patent style (as 1937) head are aimed not just at good flow but also at moderating the squish, associated burning rate, and consequent harshness.