fly pantera

iTrader: (9)

how much does porting gain in the hp department.

lets say stock 243 vs tsp stage 1 ported 243

KCS

iTrader: (20)

That depends on the rest of the setup, ie headers, intake, cam, etc.

fly pantera

iTrader: (9)

yeah thats true,full bolton 346 ls1 with ls6 intake and ms3 cam

Higgs Boson

iTrader: (3)

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.

gtotoocool1

iTrader: (6)

propely ported is the key.i've seen anywhere from 20 to almost 40 rwhp gains.but the rest of the mods/combo will effect that.