voidfinger
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DropTopPony said:GREG@SN95 said:voidfinger said:DropTopPony said:GREG@SN95 said:NPI heads are complete crap...
No they aren't...go back to the section you belong in and don't post about stuff you know nothing about.
Dang man, little harsh huh? They arn't complete crap, with work they can flow and flow decently well. But then find an intake that fits up "RIGHT" and you have a good flowing combo. But the problem is in "Stock Form" What greg said is true. I even think PI heads are crap and they make "some say" 10hp more than the npi's. I'm not talking trash about them, since i have them now, but i'm just stateing the obvious "in stock form the heads are not the best and are close to the bottom of the pole in flow numbers". uttahere:
yes... They are crap...
On just about every American smallblock / modular block... heads are the most restrictive part...
96 was the first year ford used the 281 in the mustang... It made the same HP but less TQ then the 5.0s...
In 99 ford put in the PI heads which made a huge difference...
If you like the the stock NPI heads and think that they are great then fine... but I disagree...
Sorry but the heads are not the restriction in the 96-98 intake tract... but those of you with no actual experience with 2V's only know what you read and most of what you read is false.
The NPI heads flow as good or better then the PI on the Intake side but fall behind on the exhaust which is easily corrected.
In 99 Ford did more then put on new heads they put on new Intake/Cams/and bigger valves and higher lift springs...do the same to the NPI and they are the equivalent to PI without the raised compression.
Well Bob, i understand where your coming from and i understand that the heads decent on the intake side, but why would we have to work on the heads to make them flow around that of a PI head if we can just get the pi head. I know you know alot of these engines and trust me, i'm no noob when it comes to the 2v stuff either. I've been wrenching on mine since 98 and i've learned a thing or two.
I'm not arguing with you about the major restrictions in the track either, i know that the two biggest ones is the intake and the cams. The heads come in second to those two.
One thing i do not understand though , is that fact that the npi flow like you said the same if not better on the intake side. I just don't see how they can since the port is 1/2 the size of the pi port. its bairly big enough to stick my thumb in. , who knows.