pi swap
08-28-2005, 02:18 PM
#2
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RE: pi swap
Before year 99 mustangs had what is called NPI heads. After they started using PI heads. A GT with NPI heads makes about 180 rwhp, a GT with PI heads makes about 220 rwhp. So swap in newer heads to get more power.
This swap is usually comes with porting, polishing, a valve job, improved valve train. Sometimes people install forget pistons and increase compression, in these cases a set of new cams is also used. With such mods 280 rwhp is possible with 2v 4.6L.
This swap is usually comes with porting, polishing, a valve job, improved valve train. Sometimes people install forget pistons and increase compression, in these cases a set of new cams is also used. With such mods 280 rwhp is possible with 2v 4.6L.
08-28-2005, 02:29 PM
#3
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08-28-2005, 03:44 PM
#4
3rd Gear Member
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Join Date: Sep 2004
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Posts: 998
RE: pi swap
well eventually i wanted to do an engine rebuild....after researching a lil bit it looks like this is a main component to a rebuild.. so basiclaly i would just wait till i did that right?
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