243 porting gains
depends on who ports them, how they port them, etc. "porting" is a very generic term.
243s can flow mid 300s (340-350) on the intake with a 2.10 intake valve. but to run a big intake valve you have to run a smaller exhaust valve.
if you just want to open them up a little, maybe 15 HP. if you go max effort on a built motor, more.....
it's all about setting your goals, building to spec, and then see what it makes.
243s can flow mid 300s (340-350) on the intake with a 2.10 intake valve. but to run a big intake valve you have to run a smaller exhaust valve.
if you just want to open them up a little, maybe 15 HP. if you go max effort on a built motor, more.....
it's all about setting your goals, building to spec, and then see what it makes.
