4.6 pi cams? 4.6 quick hp?
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Junior Member
Joined: Sep 2006
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4.6 pi cams? 4.6 quick hp?
hey i have a 98 f150 with a 4.6 and i was wondering has anyone done this on here?
anyone done a bunch of performance stuff to these motors?
what kind of bolt ons should i buy first?
anyone done a bunch of performance stuff to these motors?
what kind of bolt ons should i buy first?
Senior Member
Joined: Sep 2003
Posts: 3,053
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From: Aggieland, TX
The PI heads have the same cams as the NPI heads. Its all in the porting.
You need to replace the heads themselves.
Bolt ons to look at: chip/tuner, efans, cold air intake, underdrive pulleys, gears...
You need to replace the heads themselves.
Bolt ons to look at: chip/tuner, efans, cold air intake, underdrive pulleys, gears...
Senior Member
Joined: Jun 2005
Posts: 2,805
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From: NEVADA
Senior Member
Joined: Jul 2006
Posts: 6,282
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From: Farmington, MO
[QUOTE=Johngs]The PI heads have the same cams as the NPI heads. Its all in the porting.
You need to replace the heads themselves.QUOTE]
WRONG. PI heads have a different cam profile, you will gain about 15hp by adding PI cams to a non PI head. You could also do a complete head swap to PI heads. I have PI heads/cams, and NON PI hads/cams If you need anything!
You need to replace the heads themselves.QUOTE]
WRONG. PI heads have a different cam profile, you will gain about 15hp by adding PI cams to a non PI head. You could also do a complete head swap to PI heads. I have PI heads/cams, and NON PI hads/cams If you need anything!