To PI or not to PI
10-11-2009, 10:46 PM
#1
Will work for parts
Thread Starter
To PI or not to PI
Alright I have a 98 4.6 5 speed and would like to do a PI head swap... Does anybody know what years the windsor plant made pi heads? The reason i am asking about the windsor plant it that the valve covers are different. Also is it the same as a mustang as far as having to change out the intakeas well as the heads when with the pi heads?
10-11-2009, 11:42 PM
#2
Alright I have a 98 4.6 5 speed and would like to do a PI head swap... Does anybody know what years the windsor plant made pi heads? The reason i am asking about the windsor plant it that the valve covers are different. Also is it the same as a mustang as far as having to change out the intakeas well as the heads when with the pi heads?
10-12-2009, 05:22 PM
#3
Will work for parts
Thread Starter
I was not going to try for a mustang intake, just asking if the intakes were different like the mustangs are.
10-13-2009, 11:14 AM
#4
OK. Yes, the intakes are different from Npi to Pi. The shape of the ports are much different, but the Npi ports are smaller so the Npi intake could be used on the Pi heads. I mentioned the car intake because I have seen the question asked a few times.
10-14-2009, 07:29 PM
#5
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i was reading somewhere that if you use some combination of Npi/Pi block with Npi/pi heads that you could raise the compression almost a full point and it would gain a bunch of HP and some torque....? i believe that it was a Pi Block and Npi heads......??? not exactly sure.
Anyone care to enlighten me a little? and what year F150's are Pi compared to Npi?
Anyone care to enlighten me a little? and what year F150's are Pi compared to Npi?