|
SyPHER -> RE: crown victoria high performance ideas (4/6/2007 10:01:50 PM)
|
In response to: sheebeehuh
First of all I wanted to clarify: "police interceptor" ie P71 is the model, and therefore the engine can be defined as a police interceptor engine. Second: the listed OEM horsepower that is published by Ford for all P71 models are false; if you don't believe me dyno one. I'm not really sure why they list it, I would be willing to guess it's less of a conspiracy theory and more of an insurance premium / PR issue. The 2007 model is listed at 270hp with emissions by Ford Fleet Vehicles. I have a 2001 Federal Response P71 at the moment and it is actually spicer than the 2007, because it has more exhaust flow and a different gear ratio. The newer models have 17" wheels, and they are much quieter with the restrictive exhaust, and the engine has been optimized to use less fuel, so the advertized 270hp is hoo humm.. The P71 interceptor engine is a 4.6l SOHC just like the old Mustang GT's, except it has a larger throttle body, and it utilizes COP direct spark vs a plug ignition system. I have not measured the Throttle body and compared it, but it is significanty larger than the GT. I was looking for a aftermarket throttle body and I can't find one as big as the stock unit?? 75mm is the largest I can find and the stock unit it just under 4 inches, which would be aprrox. 10 cm. (75mm is 7.5 cm). The P71 also has an aggressive re-program that was dated and completed by Ford and listed on the firewall. The cams are also ground differently than any taxi or crown vic, and this gives it more mid and upper range hp. The P71 idles at under 1000rpms and can spike to 5,500 in one second, and does not have a rev limiter past overdrive. The exhaust is restricted and has an h-pipe dual design with two "hush power" mufflers to make the unit pretty quiet unless over 3,500 rpms. You can go to Ford and look everything up and get spec from Kelly BB, and you will get the same specs, but they're not correct. The P71 has a faster 0-60 and 0-100 than a 97 Mustang GT. Anyone who wants a performance Crown Vic, should buy a P71 at auction, make sure they didn't re-program it back to OEM and find a way to open up the exhaust; headers are almost nto an option due to the tight space, but the engine has more room in the bay, overall than the Mustangs. K&N and several other cold air intake companies make cold air systems that run to the throttle body; I would recommend K&N because it is under $300 online, and is synthetic so it stays very cool, and has a quality filter body that flows major air. I have not had any trouble with my K&N all seasons in Maine. Plugs are also important, Denso Iridium, Champion Iridium, MotorCraft Platinum are excellent OEM replacements and can be doen without removing any throttle parts unlike many mechanics would like you to believe. I would recommend MotorCraft unless your really running it hot, because the Iridium does better with high test fuel. P71's like 90+ oct gas, you will see a major difference over regular gas (83-86). Another thing always chekc the VIN if your buying at an auction and look for the P71, otherwise you could end up buying a taxi with an interceptor sticker on it, or a town car. Heh The Merauder was the only car in the design that competes with a P71 and a OEM program it may not. The drag guys like the Merauder's DOHC that's why; along with the fact that it's a sexier car than the P71. If they had only made more of them... Well, Reinhardt Racing caters to the panther/crown/merauder guys I hope I helped clarify a few things. Peace
|
|
|
|
