Can you feel the difference between AWD4X4 vs 2wd/4x4 models?

[Racenut]

On the " other " forum there was a write up on it and 2 people did just that. They did the " brown wire mod " then backed it into a mud hole ( the other was snow ) and let the tires fly.

There was no mention of a CEL anywhere in that thread.

 

[Racenut]

Also from what I remember of that thread, there are 2 brown wires and you need to cut the " LIGHT BROWN " wire.

 

[supermario]

I think my brother is going to try this mod. Its should be easy right, just basically splicing into a wire to add an on/off switch? Thanks for all this info. Man I have learned ALOT and feel sooo much more confident working on my Expy. Also it seems that the 97/98 Expy may have the best all around package with the 2wd option and solid rear axle huh.

 

[Racenut]

I think my brother is going to try this mod. Its should be easy right, just basically splicing into a wire to add an on/off switch? Thanks for all this info. Man I have learned ALOT and feel sooo much more confident working on my Expy. Also it seems that the 97/98 Expy may have the best all around package with the 2wd option and solid rear axle huh.

Yeah it is really easy, just snip the wire and connect one end to the " on " position of the switch then connect the other end to the " supply or Hot " position of the switch. Just make sure that it is the " LIGHT BROWN " wire that you cut and before running it to the switch, see if you can get the rear tires spinning that way you know for sure that you have the correct wire.

The '99 - '02 Expy's have the solid rear axle as well. They did not start the IRS ( Independent Rear Suspension ) until '03. The main advantage to the '97 - '98 expedition is the 2wd mode, but the '99 - '02 Expys have a little more power if I remember correctly.

 

[panda24619]

yeah ford bumped up the power for the 99 while still giving it the same mileage. it was in the computer is all they did. but an edge can even the playing field. haha

 

[toms89]

yeah ford bumped up the power for the 99 while still giving it the same mileage. it was in the computer is all they did. but an edge can even the playing field. haha

PI heads in 2000.

+30 hp / 260 hp

3v heads in 2005?

+40 hp / 300 hp

 

[panda24619]

or that was it? i knew it was something. i wouldn't mind some new heads though. can make a big difference in power. but for the price its about 1/5 of what my expo is worth.

 

[nvycrmn]

i have owned both, a 98 and my 01. i love my 01 but would prefer the t-case and ecu from the 98 with the 2wd option. i like having the A4WD function for instances like mud mentioned, snow and sometimes light mud. i usually only use my 4wd if its gonna get hairy!

 

[supermario]

I love my 97, my brother had a 2001 and you could tell the difference in power, especially when towing. I just need to find a place that does good rebuilds with warranty and more hp. I was thinking of going with a MMR longblock. Kinda pricey but
i plan on keeping my Expy forever. Check out these engines.
http://www.modularmustangracing.com/
These engines are built to for forced induction but I would think it would make a very durable strong engine anyways. Just curious
what kind of HP would you get from that with the ported head job? Anybody have an idea?

sorry for the threadjack but I started the thread so i dont mind

 

[panda24619]

i want something unique. how about a 2500 hp expo?? haha who needs ac? just roll down the windows and shift into 4th. haha i wouldnt mind something upwards of 500 hp though. i want a lightning motor and instead of S/c take that off and turbo it. but i would have to put new heads on it.

 

[toms89]

Stock PI heads on the earlier non PI blocks are worth a bit more than 30 hp as it raises the compression to about 10.5 to 1 I believe. Stage 2 patriot performace heads add another 30 - 40 (advertised). Need to be aware of piston to valve clearance with the older expys. I think it is ok with the stock cam but the ptv clearance is tighter on the older expys.

You would also have to use PI intake with these heads.

 

[panda24619]

from what i keep seeing. with the 5.4s you have to be really careful on what you add. you might be able to add new heads, but then you also have to build the lower end too and also get a new intake. so thats why if you get a lightning motor, the crank is built, just get new heads and intake and swap on the s/c and a turbo. cant go wrong with that.

 

[toms89]

from what i keep seeing. with the 5.4s you have to be really careful on what you add. you might be able to add new heads, but then you also have to build the lower end too and also get a new intake. so thats why if you get a lightning motor, the crank is built, just get new heads and intake and swap on the s/c and a turbo. cant go wrong with that.

You really should not have to worry about the short block unless you add boost and or nitrous. The rods and pistons are the weak link. I have been researching recently and it appears most of the earlier expys (< 2003 ? )came with forged cranks. This was said by a few lightning engine builders. Crank is good for around 1000 hp. Lightnings came with forged pistons... expys did not. Not critical unless you add boost. Modified lightning have been known to throw stock rods around 500 rwhp.

If you do change to PI heads on non pi headed expy you would need the pi intake to go with it.

 

[panda24619]

got it. i do know the 4.6 has all forged internals. so if you want a really strong stock motor start with one of those. but i like my 5.4. so i wont go down. haha

 

[supermario]

got it. i do know the 4.6 has all forged internals. so if you want a really strong stock motor start with one of those. but i like my 5.4. so i wont go down. haha

So your saying the 4.6 that came in the Expys had forged internals (crank,rods,pistons)? Now I have another question, we just got another Expy with the 4.6 and the cover over the intake says " Triton 4.6"? I thought the triton engine was only the 5.4? Is the 4.6 that came in Expys different than the 03 Mustang 4.6 engines? Why would they make forged internals on an Expedition but not a Mustang GT? Thanks any info would help. Just trying to learn a lil more about my sisters Expedition that she just bought with the 4.6.
My Expy is a 5.4

 

[panda24619]

So your saying the 4.6 that came in the Expys had forged internals (crank,rods,pistons)? Now I have another question, we just got another Expy with the 4.6 and the cover over the intake says " Triton 4.6"? I thought the triton engine was only the 5.4? Is the 4.6 that came in Expys different than the 03 Mustang 4.6 engines? Why would they make forged internals on an Expedition but not a Mustang GT? Thanks any info would help. Just trying to learn a lil more about my sisters Expedition that she just bought with the 4.6.
My Expy is a 5.4

as far as i know all the 4.6 has forged internals, ie, crank rod pistons, not sure about crank though, i know pistons, and also there is no rods. its an over head cam. so the cam spins on top and presses the valves. 2 cams to be exact, one on top of each side. the navi motors, they are 4 valve engines. 2 cams per side. so 4 cams total. and i think the mustang motor is the same, but you would have to ask ford on that. and no these motors are called modular motors. they had a bad rep when they first came out. 80s i think. all ways broke down. so then they changed the name to triton. still a modular motor to any ford engine guy. the only difference between the 4.6 and 5.4 in size is the internal combustion chamber size. if you put the 2 motors next to each other, an amateur would not be able to tell the difference between the 2. ugh! that was a lot. haha any other questions just let me know. ill simplify for you.

 

[toms89]

The 5.4 is basically a taller deck 4.6 block. Both share the same 3.552" bore just longer stroke for the 5.4 @ 4.165 vs 3.543 for the 4.6. Both use the same heads but the 5.4 need different intake because of the wider spacing of the heads. Both 4.6 & 5.4 came with Hypereutectic pistons and cracked powdered metal rods. Only the blower motors came with forged pistons. (lightnings, cobras, etc.)

A good book to get for information and history of the modular motors is:

How to Rebuild 4.6-/5.4-liter ford engines by George Reid

http://www.amazon.com/gp/product/1932494804

 

[panda24619]

thats it. i knew it was something like that. i forgot! haha i know too much other shit to remember that. but the deck height is whats important.

 

[ExpeditionDrew]

on my 99 4.6 i just pulled the #104 fuse and didnt worrie about putting in a switch it drives so much better, but to the engine is there any body who beefed up a 4.6 and made more power without blowing the engine....

 

[panda24619]

i think the mustang 4.6 is the same motor. so you should be able to add a S/c with low boost and be all good.