Which heads should I use?

[jfor441]

Ok... I have some NPI heads I can use and I also have PI heads I can use. My motor will be a high compression nitrous motor. I will be running a Snow Performance water-methanol kit. I will be sending the heads off to Modular Mustang Racing for their stage 3 head work. Need ya'lls opinion!

 

[Black97GT]

If you are going for high compression nitrous..seems like PI heads would be the obvious choice. Easier to make power out of them and will already give you a jump in compression to start with.

 

[MustangMatt96GT]

NPIs are better ported N/A

And since ur going to hae to do a shortblock anyway just run flat top pistons. NPIs n/a can out flow PIs ported the same way.

 

[AaRoN]

PI's!!

 

[jfor441]

NPIs are better ported N/A

And since ur going to hae to do a shortblock anyway just run flat top pistons. NPIs n/a can out flow PIs ported the same way.

Already have the shortblock finished with flat top pistons. NPI heads will give me 11.2:1 and PI heads will give me 12.2:1. Just trying to decide which set of heads to go with here.

 

[Johnny Langton]

For a power adder car-you need the extra exhaust flow that the PI's have over a NPI.
You can cram the air in with a SC or make your own air with N2O-then you need to get it out-so the better flowing exhaust port wins here.
JL

 

[jfor441]

For a power adder car-you need the extra exhaust flow that the PI's have over a NPI.
You can cram the air in with a SC or make your own air with N2O-then you need to get it out-so the better flowing exhaust port wins here.
JL

Thank you JL. That really helps my decision!

 

[justinschmidt1]

honda vtec heads utofcloset: