4 port head, or 8 port head??

[skdline63]

hey i hav the choice off putn the new zealand new head on my motor which is 4 ports on the intake side or i can stick with the jap 8 port head, wat do u guys reckon will get the most power? im rebuilding my motor with forged pistons and a HKS head gasket, will be on around 20 psi, thanks in advance.

[NUT-CSE]

More Power = 4 Port!!!

[rico05]

The idea of the 8 port head is to have the auxilary butterfly system in place to aid in low end torque. This system is rather complex, so eliminating it with the 4 port head will clean up the engine bay and make building the engine "easier". However, I have seen plently of high power CAs with both head configurations. For an all out build, I would prefer the port design of the 4 port head, but you can make good power on both. If you decide to run the 8 port head, just totally remove the butterfly system first.