Hopefully this is the right place to post this, anyway, looking to do a 5.4 litre Navigator swap into a 98 GT mustang 5 speed. From what I can understand this is the same motor used in the cobra R but with different intake/exhaust manifolds and cams. Anybody on here done the swap before? I did a search but not much came up. Please supply any and all information you can find as well as links and pictures if you know of any that exist. If you can think of any problems or know someone who has done the swap please inform me as well. Thanks in advance for all of your help.
Oh, I need the computer with the engine right? Does anybody that has done the swap have a preference on gears or any other advice? thanks again.
In the November issue of 5.0 Mustang they did the swap. They used an '00 E-150 5.4. The big thing they made was an adapter plate to reuse the 4.6L intake. There was some other differences, reusing the oil filter mount off the 4.6 and the oil pan off the 4.6 had to have the baffles bent down a 1/4 of an inch. The 4.6 flywheel bolted on, they were using an eight-bolt Windsor and not a six-bolt Romeo.
The extra 1.6-inch wil make installtion with the A/C lines and brake lines a bit more difficult. So, you'll have to tilt the engine until you get it right. Your H-Pipe will have to be adjusted to be wider also. There will be a lump on the passenger side header that will be needed to be ground off. A custom heater hose will need to be found. The passenger side half of the H-Pipe will need to be lenghtened one inch. The engine will sit 2 1/2 inches higher so the hood might need to be hacked on for the best fitment.
After the tuning was all said and done, the test car was already outfited with a K&N air filter and Flowmaster Three-Chamber mufflers welded into place. Through the 4R70W, the tuned engine produced 329.7 Ft./Lbs. @ 2,500RPM and 226.0 HP @ 4,500RPM. That was a gain of 93.2 Ft./Lbs of torque and 44.3H at the rear tires.
They said the Stang pulled hard all the way up to 5,600 RPMS but they couldn't get past the long runners on the 4.6L intake. A simple cam swap or intakke swap would take care of that.
. I'll search for the Nov. issue of 5.0 stang if I don't already have it. Really thanks a lot, that is some very perecise information!
