working on a 1997 f-150 4.6L romeo npi, i found a 2002 4.6L romeo pi short block, will any of the intake parts fit on the pi. fuel rails, intake, alternator bracket,valve covers. any help would be great.

 

You're saying you've got a PI short block but the title say long block. PI block with NPI heads means you lose compression and power. Good for forced air but not N/A.

I'm assuming you're talking about putting the PI motor in your NPI truck. In that case you need the PI intake and PI alternator bracket, assuming you're talking about a 2002 f150 4.6l. If not you have a bunch of other stuff you need to swap over. Make sure both motors have the same number of ribs on the pulleys.

 

Actually one of the heater hoses is relocated so you need a few feet of 5/8" heater hose and two hose clamps. Also PI motors only use one coolant temp sensor and NPIs use two. That means you have to find a place for your temp sensor. There is a flat spot on the back passenger side of the PI intake where the NPI intake has a heater hose coming out and that spot can be drilled and tapped with a 3/8" NPT pipe tap.

Or you can do like I did and use http://www.quadratec.com/products/17...googlemerchant and to put the sensor in the upper radiator hose. I recommend getting a new upper hose because old ones loosen up and put silicone all around the lip of the flexalite adapter before you shove it in the new hose. Hose clamp both sides tight and it shouldn't leak. Obviously make sure you let the silicone set up and dry completely before putting coolant in and starting up the truck.

 

1997 truck with 4.6l romeo npi blown motor. have a 2002 f-150 4.6l romeo block with heads only. just wanted to know what intake i needed to use.

 

Well if you use PI heads you need a PI intake and vice versa. If you're reusing your NPI heads you need to use your NPI intake, and you're going to have lower compression. I don't know how much that will affect performance but I guarantee it will be negative.