sorta agree with YR
LSA is a result not an input
figure the degrees of overlap at .004 or .006- whatever your cam grinder uses and use a number that gives you the vacuum you need
(obviously you have to take the durations into account when figuring overlap- lsa by itself is meaningless)
that covers intake open and exhaust close for a first check, now determine your intake close (as early as possible) and exhaust open (as late as possible)( at your rpm and power levels desired) and see where you're at
as you have noticed 4 " and even longer parts are easier to find and less $$ (except for the pistons) than 3.79- but shop around
get your head flows even .050
get the data together required to fill out both of these forms and everything else relevant
Road Race | Jones Cams
Street Performance | Jones Cams
if FT or Roller
