PI head swap
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Posting Guru
Joined: May 2006
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From: Iowa
So how much would a used cam, intake and, NPI head cost. Probably because he will aske me how much do i want to give him. Somthing cheap obviously but fair enough to not insult him... lol I have no idea how much used parts are.
Post Fiend
Joined: Jan 2007
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From: Stanton DE
I always look on ebay to see what parts are going for.That will give you some idea how much to offer.
By the time you buy a set of NPI heads and have them ported you could probably just buy a set of ported PI heads.
By the time you buy a set of NPI heads and have them ported you could probably just buy a set of ported PI heads.
Last edited by phil6608; Mar 8, 2007 at 07:27 AM.
Thread Starter
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Posting Guru
Joined: May 2006
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From: Iowa
Cant put PI heads on a non PI motor with out running higher octane fuels. Raises compression. Im gunna do all the work... I have porten many heads so it shouldnt be a problem.i wouldnt think more than 200 bucks.
Fleet Owner
Joined: Mar 2003
Posts: 24,724
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From: Blue Hill Township
Originally Posted by phil6608
I always look on ebay to see what parts are going for.That will give you some idea how much to offer.
By the time you buy a set of NPI heads and have them ported you could probably just buy a set of ported PI heads.
By the time you buy a set of NPI heads and have them ported you could probably just buy a set of ported PI heads.
Post Fiend
Joined: Jan 2007
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From: Stanton DE
Well obviously if you port them yourself you'll save tons of money.
And I forgot about the compression thing.
If you planing on going with forced induction then you'll want the compression as low as you can. But if no blower plans I would get the compression up there to make more power.
And I forgot about the compression thing.
If you planing on going with forced induction then you'll want the compression as low as you can. But if no blower plans I would get the compression up there to make more power.
Last edited by phil6608; Mar 8, 2007 at 08:07 AM.
Thread Starter
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Posting Guru
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From: Iowa
I wouldnt mind runnin higher compression but this summer when gas goes to 3.00 for premium. thats gunna suck a bit. So i like the flexibility. This is my daily driver and my only real reliable vehicle. I have a tapped out corolla that i drive to work, but im just waiting for it to drop out. lol... so i still want it to be flexible. I have know idea if i will ever get around to puttin a blower on this thing, to many other plans probably. This will probably be the last mod i end up doin to it.
Post Fiend
Joined: Jan 2007
Posts: 18,157
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From: Stanton DE
Here ya go. This looks like a good price if you have the Romeo motor!
http://cgi.ebay.com/ebaymotors/4-6l-...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/4-6l-...spagenameZWDVW
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Thread Starter
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Posting Guru
Joined: May 2006
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From: Iowa
I can get every thing cheaper than that. Like i said, my cousin has a bone yard of 97-03 f-150's. Pretty much every thing i need. And most of it he dosnt even care about because he has robbed the parts he needs. He rebuilds tons of our trucks and has a bunch of **** left over.
Postmaster
Joined: Oct 2006
Posts: 4,171
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From: SE Texas
Swapping a PI intake onto a NPI truck is honestly not worth hardly anything. The PI truck intake is almost identical in port cross section to it's NPI counterpart. The cams do give a nice torque gain,but minimal on the HP because of the intake choices. Trucks are severely knock contrained,so a compression bump that PI heads would yeild on a NPI shortblock would be counterproductive-you'd have to seriously retard the ignition timing to get it run without pinging-even with premium fuel. Porting modular heads isn't about making the ports larger,and getting more flow-there's alot of specific things that needs to be done to get flow without hurting velocity.
JL
JL
Postmaster
Joined: Oct 2006
Posts: 4,171
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From: SE Texas
Originally Posted by MisterCMK
A car PI intake wouldn't be a bad idea though
Plus, there's the issues with throttle cable hookup, cruise cable hookup, EGR tube hookup, and the TB inlet being on the passenger side of the car intake(unless you use a Crown Vic intake).
JL
Post Fiend
Joined: Jan 2007
Posts: 18,157
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From: Stanton DE
This guy did the swap with great results. Ask him about it!He'll tell ya how it all worked out. He's making good power.
http://www.f150online.com/forums/member.php?u=98392
http://www.f150online.com/forums/member.php?u=98392