I kno the 243's and 317's flow pretty much the same. Question I have tho is it worth it 2 switch my 317's and spend the coin on some 243's? Will it help my compression enough 2 make a difference on my lq4 or should I spend the money on somethin else?

 

if u mill the 317s there identical to the 243's

 

I don't want 2 mill the 317's plannin turbo in a yr or 2.

 

Here is a calculator... http://www.csgnetwork.com/compcalc.html