questions about PI

[bigjohnson4.6gt]

i got some questions about PI heads, if i bought a full h/c/i swap from a new edge gt and got them ported and polished how much of a hp gain would i be looking at, also could you just swap in a pair of say comp cams stage II cams? all in all how much of a gain would be brought with this combo? sorry if anyones asked this already

 

[19mustang95]

it all depends on what stage porting you get done and how good they are...and with stage 2 cams you will need new springs.

 

[bigjohnson4.6gt]

what are the stages?

 

[19mustang95]

the stages are how deep you want the porting and how much you want to pay. similar to cams, the larger the number, the larger the amount of porting you are gonna get.

 

[voidfinger]

and the more porting the more you lose low end torque, especially with stage 2 or better cams.