Will a Ford 5.4 engine fit into a 2000 Ford Crown Victoria Police Interceptor without substantial modification and if it will can the stock automatic transmission handle the extra power?

Answer 1

Wrong AnswerWithout substantial modification? No. Never. Think about it, you're taking a truck engine from a truck engine compartment and trying to stuff it in a (otherwise large) car engine bay. You will have hood clearance issues, and inner fender clearance issues. Plus I think it might be heavier. Just take the money you will waste in buying a 5.4 (which is an expensive tuneup or a pain in the ass if you do it yourself) and put a supercharger in the interceptor. That's all you need, it already should have a good gear setup being an interceptor I would imagine.

Right answer:

BY r3dn3ck:

The answer above is almost entirely incorrect. It might be heavier heheheh. Well, yeah it is. Specifically, depending on the year of motor you use it'll be ~26lbs or ~44lbs heavier. It will fit well as has been demonstrated many times by the dozen or so Lightning swapped P71's. The only difference between a 4.6 and a 5.4 is deck height and the things that affects so it swaps fairly easily. The motor mounts are identically placed between the two relative to the oil pan rail. All the accessories transplant easily.

You'll want to buy a motor from a <01 expedition or van for the easiest time. You will need an intake manifold or intake adapter plates for good car performance (the truck intake is best left to trucks). A dyno tune is recommended but not mandatory. Cars with automatic transmissions should consider it mandatory for best drivability to get a dyno tune with a chip or handheld (costs about 500 bucks for the tune and chip/handheld) as the torque settings in the tune affect shifting of the trans.

Then check out www.hiperformancesolutions.com/54.HTML. HPS makes an intake manifold dedicated to swapping 5.4L 2v engines into places that used to have 4.6L 2v engines (mustangs, Crown Vics, etc...) without having hood clearance problems.

Don't take my word or ^^ his. Google it and look for cars on streetfire.net that have been swapped.