which would be better?

[98_MustangGT]

I was wonderin which would be better (meaning the most gains in power). Polished/ported npi heads or pi heads? :dunno:

 

[AaRoN]

I've heard the p/p npi heads gain more.

 

[98_MustangGT]

really? ive heard like a 60-70 hp gains by goin to pi heads. how much more of a gain do p/p npi give you? how much would it cost to have npi heads p/ped?

 

[gt96stang]

if you went ahead and did pnp npi's, a nice set of cams, and pi intake... you could easily pick that 70+

 

[AaRoN]

really? ive heard like a 60-70 hp gains by goin to pi heads. how much more of a gain do p/p npi give you? how much would it cost to have npi heads p/ped?

you won't get 60-70 hp from just the heads alone.

 

[98_MustangGT]

whats to average cost to have heads polished and ported?

 

[AaRoN]

its $$$

 

[DropTopPony]

You will gain more from a well done P&P and Valve Job'd NPI head then from stock PI head.
Expect to pay anywhere from $500-$2000 for the work depending on who and what you have done.

There is a nice set for sale already done in the classifieds section for like $750.

 

[Paul]

Expect to pay anywhere from $500-$2000 for the work depending on who and what you have done.

Goddamn that's a lot of money.

 

[QTRHRSE]

i think PI's just because of the comp. jump

i ran 14.62 at 96 in my 98 full bolt-on geared... remember its an auto vert at FULL weight

i did Patriot stage 2 PI's, 274 cams, BBK shorties... went 13.62 @ 108.xx

a full second and 12 mph... weather was decently close, within 5*
it would went alot better, but i was on the stock stall with those big cams... 60ft was a 2.3 with no spinning, just didnt have much way down low off idle.

either way to gain 12mph in the 1/4 is a big power gain, i dont think i coulda done that on ported NPI's

 

[DropTopPony]

Expect to pay anywhere from $500-$2000 for the work depending on who and what you have done.

Goddamn that's a lot of money.

That is going to include Valves/Springs/guides etc fully assembled...for just port work it would be cheaper.

 

[Paul]

That is going to include Valves/Springs/guides etc fully assembled...for just port work it would be cheaper.

This still a lot of money. My heads are ~$2500 fully CNC ported and assembled with titanium retainers and locks, and I didn't have to have a set to send them to start out with.