PLEASE HELP!!! Who has actually done a PI Head/intake swap?
03-22-2016, 07:51 PM
#11
I would definitely appreciate those part numbers!! If I do all this, the head & intake swap with a mild tune, how much extra power can I expect? This will be my daily driver. Not hard on her at all, and rarely pull anything. Will this work give me a reliable engine long term?
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flyin51 (03-22-2016)
03-22-2016, 10:54 PM
#15
So I will need to run more than that octane? Does ethanol content play into it at all? This might be a stupid question, but as im trying to track down an intake manifold, I get confused. Do I need the 03 4.6 upper or lower manifold? Both? Or do they usually come together as one?
03-23-2016, 09:23 AM
#16
You just need the intake manifold with out throttle body elbow. With very conservative timing it will be fine on 87. I run e85 for performance. I don't care about cost of fuel or mpgs.
03-23-2016, 10:25 AM
#18
Senior Member
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If they go to pi heads they will need the intake.
03-23-2016, 02:21 PM
#19
Swapping the heads won't work without swapping the intake as well. The port alignment and port shapes are completely different. If they search around there use to be a few Mustang companies that made adapters to run npi intakes on PI heads.
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flyin51 (03-23-2016)
03-23-2016, 09:49 PM
#20
Senior Member
You wont have to do anything with the extra coolant temp sensor, I am not using it at all. I am only using the Factory CHT. Heads can be from a 99+ Mustang GT, 99-03 5.4 F150 or a 01+ 4.6 F150. You will need a newer intake manifold (01+ 4.6 F150). But you will only need the intake it self. You wlll need to reuse you throttle body elbow. Also get a set of manifold from a PI truck. The ports are larger and are slightly reangled to flow better. You will have to open up the bolt holes on the 2 bolt flanges. You would also need the newer EGR tube as well.
A custom tune would be ideal. You can get away with 87 as long as the tuner doesnt push the timing to far. Compression ratio will be close 10.2:1. My experience is slightly different because the 5.4 but I also have cams and alot more compression.
I would upgrade the fuel pump, along with upgrading to 24# injectors. We are talking about close to 100 hp at the crank difference.
A custom tune would be ideal. You can get away with 87 as long as the tuner doesnt push the timing to far. Compression ratio will be close 10.2:1. My experience is slightly different because the 5.4 but I also have cams and alot more compression.
I would upgrade the fuel pump, along with upgrading to 24# injectors. We are talking about close to 100 hp at the crank difference.
EDIT: NM, he's converting a 4six. So that really doesn't matter.
Last edited by Jbrew; 03-23-2016 at 10:02 PM.