PI vs Ported NPI with cams
06-12-2006, 08:47 PM
#1
3rd Gear Member
Thread Starter
Join Date: Jan 2005
Location: Canton Ohio
Posts: 731
PI vs Ported NPI with cams
Well i ended up picking up a 4.6 with 30k out of a wreck 97 t-bird (paid $350). I've been starting to think about my choices. I can:
1)Do a pi swap, bumping my compression to 10:1.
or
2) Port the new motors heads, 5-angle valve job, springs, cams, LT headers, ported pi intake manifold, and get a tune.
I don't have a whole lot of money to port the pi heads and do the rest of the bolt on's, and i want to keep the compression down for a blower. I've heard that ported npi heads are better then pi heads, but n/a what kinda of power difference will i see? I know the ported head setup i'm looking at will for sure make more power, but how does it compare to the basic pi swap?
1)Do a pi swap, bumping my compression to 10:1.
or
2) Port the new motors heads, 5-angle valve job, springs, cams, LT headers, ported pi intake manifold, and get a tune.
I don't have a whole lot of money to port the pi heads and do the rest of the bolt on's, and i want to keep the compression down for a blower. I've heard that ported npi heads are better then pi heads, but n/a what kinda of power difference will i see? I know the ported head setup i'm looking at will for sure make more power, but how does it compare to the basic pi swap?
06-12-2006, 08:55 PM
#2
5th Gear Member
Join Date: Nov 2005
Location: MN
Posts: 4,412
RE: PI vs Ported NPI with cams
The probably will still be in the intake manifold. The only manifold I am aware of for the npi engine is the svo intake. Which is a great intake if you feel like spending $1500.
06-12-2006, 08:58 PM
#3
6th Gear Member
Join Date: Jan 2004
Location: United States
Posts: 12,575
RE: PI vs Ported NPI with cams
ORIGINAL: Dsmfighter
Well i ended up picking up a 4.6 with 30k out of a wreck 97 t-bird (paid $350). I've been starting to think about my choices. I can:
1)Do a pi swap, bumping my compression to 10:1.
or
2) Port the new motors heads, 5-angle valve job, springs, cams, LT headers, ported pi intake manifold, and get a tune.
I don't have a whole lot of money to port the pi heads and do the rest of the bolt on's, and i want to keep the compression down for a blower. I've heard that ported npi heads are better then pi heads, but n/a what kinda of power difference will i see? I know the ported head setup i'm looking at will for sure make more power, but how does it compare to the basic pi swap?
Well i ended up picking up a 4.6 with 30k out of a wreck 97 t-bird (paid $350). I've been starting to think about my choices. I can:
1)Do a pi swap, bumping my compression to 10:1.
or
2) Port the new motors heads, 5-angle valve job, springs, cams, LT headers, ported pi intake manifold, and get a tune.
I don't have a whole lot of money to port the pi heads and do the rest of the bolt on's, and i want to keep the compression down for a blower. I've heard that ported npi heads are better then pi heads, but n/a what kinda of power difference will i see? I know the ported head setup i'm looking at will for sure make more power, but how does it compare to the basic pi swap?
06-12-2006, 09:02 PM
#4
3rd Gear Member
Thread Starter
Join Date: Jan 2005
Location: Canton Ohio
Posts: 731
RE: PI vs Ported NPI with cams
I've read that with a little modification the pi intake manifold will mate up to the npi heads, plus a local guy has one on his npi as well.
I'd love to get a svo... but once again i'm a poor college student trying to make a slow car fast.
I'd love to get a svo... but once again i'm a poor college student trying to make a slow car fast.
ORIGINAL: amoosenamedhank
The probably will still be in the intake manifold. The only manifold I am aware of for the npi engine is the svo intake. Which is a great intake if you feel like spending $1500.
The probably will still be in the intake manifold. The only manifold I am aware of for the npi engine is the svo intake. Which is a great intake if you feel like spending $1500.
06-12-2006, 10:36 PM
#5
6th Gear Member
Join Date: Jan 2004
Location: United States
Posts: 12,575
RE: PI vs Ported NPI with cams
ORIGINAL: Dsmfighter
I've read that with a little modification the pi intake manifold will mate up to the npi heads, plus a local guy has one on his npi as well.
I'd love to get a svo... but once again i'm a poor college student trying to make a slow car fast.
I've read that with a little modification the pi intake manifold will mate up to the npi heads, plus a local guy has one on his npi as well.
I'd love to get a svo... but once again i'm a poor college student trying to make a slow car fast.
ORIGINAL: amoosenamedhank
The probably will still be in the intake manifold. The only manifold I am aware of for the npi engine is the svo intake. Which is a great intake if you feel like spending $1500.
The probably will still be in the intake manifold. The only manifold I am aware of for the npi engine is the svo intake. Which is a great intake if you feel like spending $1500.
Have you looked into junkyard PI motors? They made a ****ton of these cars every year, there should be alot out there to choose from....
06-13-2006, 12:33 AM
#6
3rd Gear Member
Thread Starter
Join Date: Jan 2005
Location: Canton Ohio
Posts: 731
RE: PI vs Ported NPI with cams
I have, and i got way to sweet of a deal on this npi 4.6 to pass it up. The cheapest pi 4.6 is $1500 and thats with 2x's the miles, and i could do a pi swap for 1000 and make more power.
Thread
Thread Starter
Forum
Replies
Last Post
