Pewter53

iTrader: (36)

found a good deal on some ported 241's and wanted to know if the chamber size with mine being 4.00 in bore and the 241's being 3.9 would that work if so would it be worth the swap would be doing a ms4 at the same time ?

Low_LSX

iTrader: (33)

It will work. What are the specs on the heads?

dirt track racer 81

iTrader: (45)

i had hand ported 241s on my lq4 with a 230/226 cam..

GMCtrk

iTrader: (27)

I was recommended against ported 241s in favor of 243s or 317s. Better combustion chamber design on the latter I believe

Pewter53

iTrader: (36)

well 297 and 205 at .600 28x 200 at .550 is what he said.

Pewter53

iTrader: (36)

how did it run ? I have a ms4 sittin in the living room and these heads come with prc duals and titanium retainer for 300 shipped.

dirt track racer 81

iTrader: (45)

243s are what i have on my 370 now..in all honesty id go with a 317 head and have them milled .040 and still be around the same compression as the 241 head..but yet since the ones hes wanting to buy are ported..might be best to go with them

GMCtrk

iTrader: (27)

that's a lot of flow for a 241. I'd like to see that verified with a flow sheet.

GMCtrk

iTrader: (27)

Well, the nice thing about non milled 243s is no worry about PTV clearance. He's got an LQ4, stock 64.45cc 243s would be perfect, bringing compression to a nice 10.6:1

dirt track racer 81

iTrader: (45)

351rwhp on a loaded mustang dyno and got to 12.56 in the 1/4 with a 2.00 60ft.
only got it to run it once with the new intake before my rear end started actin up