89 5.0 Mustang

"As far as I know only one kind of head was on the 2000 GT--A 2v Windsor. While the 99-04 4.6 GT's all came with PI heads, the 99-00 (and some 01s) had Windsor motors. 01-04 had Romeo motors. Windsor and Romeo heads are slightly different."(Eagle2000GT)

I have heard that the romeo blocks are not good to have and im lookin to buy either a 01 or an 02 (cause of price) and i wanted the windsor block. Why is it not as good, and how can u tell which is which?
(Sorry it is off topic of the 2v and 4vheads question)

Eagle2000GT

That is a subject of great debate. The majority will argue that there isn't any difference in performance between the two and that they've seen broken rods and pistons in both. The Windsor came with an eight bolt crank, the Romeo with a six bolt crank. Perhaps that makes the Windsor a little stronger. I was once told that Ford changed the way they cast rods and pistons in '01. That may be true but I can't get anyone to confirm it. But there are indications that the Windsor is a stronger motor. In their 2007 catalog, ProCharger sells superchargers for the 00-04 Mustangs at 8, 10, and 12 lbs of boost. They then have a footnote recommending that 01-04 Mustangs be limited to 8 ibs of boost.

silversol81

I've heard that the '01-'04 generally dynos alittle higher...That's just what I've heard though. Can anyone confirm?

89 5.0 Mustang

Thanks alot for the input, so when it comes time to buy this spring an 01 will still be fine even if it has the romeo block. Like the romeo block will still work fine for a street strip setup. It would be long befor i put any boost in it, it would really just be bolt ons for a while, so i shouldn't run into any problems right? If it still has the romeo block will it still have the old tranny of the Tremec 3650?

Eagle2000GT

The Romeo block will be just fine. You'll have the codes on the driver's door to see what transmission an '01 has. They changed mid-year.

rainydayracing

Yea, I wouldn't bother with the heads. Blow it, and if/when it goes boom get a long block

oxfordgt

Wow. This thread is just full of bad info.

The only differences between the 2v PI heads between 99-04are that in 03 ford added extra threads to the sparkplug holes to fix the sparkplug blowout problem and the windsor heads have 13 valve cover bolts and romeo has 11. If you have a 2000 you have windsor heads.

4v heads will bolt right up to a 2v block with no machining required. The 4v and 2v blocks are the same castings with the only difference being the main caps used. 4v blocks have 4 bolt mains and 2v blocks have 2 bolt mains. The only modular 4.6L block that has its own casting that is different from the rest is the 96-98 4v cobra teksid blocks but you can still bolt 2v or 4v heads to that.

That is completly false. The 2 blocks are just as strong as oneanother

An 8 bolt crank is no stronger then a 6 bolt crank. Those bolts just hold the flywheel on.

Ford did not change the way they cast the rods or pistons. They are just as strong in 04 as they were in 96.

The boost recomendations made are because ford changed the piston cc 01. 99-00 the piston cc was 18.10cc and in 01-04 the piston cc was 15.80cc. The bigger the cc the lower the compression ratio the more boost you can run. Which is also why the 01-04 will dyno a hair higher then the 99-00.

Anything else you guys want to know about the 4.6L

89 5.0 Mustang

Wow thanks alot to everyone for their input i learned alot tonight