errknee

well i'm new to the modular motor thing with a 98 gt I got a set of windsor 5.4l pi heads they will fit right??? what does this do to my compression and another thing comp cams (the stage2 for pi heads) says i need a gear stall and pcm upgrades.... what kind of upgrades ?????? what can i expect to get out of a 4.6l this car has a 70mm tb and a k&N
and ported upper I don't realy want to use a power adder just want to be fast how do these compare to the good ol'5.0s ???

mdvaldosta

You can use the pi heads, but you gotta get a pi intake as well and some misc other items for the swap. The swap will add close 50hp and raise your compression to 10.5 to 1. You'd be making more power than a 99+ due to the higher compression. You may need a tune after though.

errknee

THANKS ALOT!!!!! for the info I've been doing my home work I got a list of the parts I need with the ford #s on it the other thing I'd like to find out is how the car will react to the bigger cams will this be enought to get by th "bolt on race cars" my town is so full of .....what option do I have short of a boost or spray..... I do have the rest of the 5.4 doaner engine it is a complete with 26000 miles will this fit in the mustang body ????

mdvaldosta

Slap that whole engine in the stang!!!! Do a camswap first though. You'll also need a cowl hood and custom exhaust. Probably some other stuff Im missing too. Its no easy feat, but would be cool as hell!

errknee

THANKS EVERYONE.. swapping out 4.6l to a 5.4l.....do you realy think it will fit i was told it wouldn't has anyone out there done this yet???? please help with any information it looks like it could be a hell of a job it should be worth the time if it could be done without mega bucks...PLEASE fill me in with intake options and exhaust options the truck intake is huge
THANKS FOR ALL THE HELP GUYS!!!!!

mdvaldosta

There was an article in a mustang mag a few months back that did this. It will fit fine, they used a mustang intake on the 4.6, they needed a spacer to make it fit though. It fits just fine, other than being taller. You would likely need a cowl hood though. And you would most likely need custom exhaust as well. Not a very expensive ordeal it seems. Look for the magazine article for a better idea of what needs to be done - looked simple as I recall.

callmecobra

it will fit, its not all that complicated. are you using a 2v truck motor, or a 4v navigator motor?

errknee

i am using a van motor 2v

errknee

THANKS.......for everything a couple more questions were can I get the intake spacers, and who builds sell or can get headers for this swap if any one has any ideas or helpful information lets us know
THANKS AGAIN!!!!!!!

roundman

check out the technical forum for 4.6L cars for more information and maybe someone there has done this swap and will respond to your questions.