This: "I get the feeling that you may know someone who has tinkered with a motorhome 440 before…"I get the feeling that you may know someone who has tinkered with a motorhome 440 before… according to the Stan Weiss compression calculator: with the pistons .170 in the hole (that’s a thing with motorhome 1.912 compression height pistons), worst case chamber volume of 90 ccs with 7 ccs reduction by .030 cut (83cc’s), and 4.55 bore X .039 8519 PT-1 head gasket, we’ve got a womping stomping 7.7:1.
Seems to me, there's some humility in 318willrun...
















