5.4 ?????

voidfinger · Feb 15, 2008

mine in the 98 went for 170 till the pump failed.

Sad to say but it was the original fluid too........... :nonono:

Jrgunn5150 · Feb 16, 2008

Yeah, lol they are absurdly tough. Lower miles is better, but like I've said, the 5.4 is stronger internally. Your call.

atrainsgt · Feb 16, 2008

How much stronger in terms of torque can the 5.4 tranny handle? VS the 4.6L??

voidfinger · Feb 16, 2008

and what would make them stronger? just curious

Jrgunn5150 · Feb 17, 2008

The wave plate inside is different. To make a long story short, they clamp the clutches tighter, probably for towing. The also engage quicker.

1996mustangGT · Feb 17, 2008

i found a used 2003 5.4 for $700....
think im getting it

came out of a f150 and comes with all accesories...
:dancing6:

atrainsgt · Feb 17, 2008

I'm not sure which I will get, now I got a problem even being able to pick it up because The truck I was going to use blew a gasket. Think I can fit a 4r70w in the trunk of my car? If I can I'm going to use allot of cardboard and plastic to keep my trunk clean.

Jrgunn5150 · Feb 17, 2008

Shouldn't be a problem.

voidfinger · Feb 17, 2008

or remove your back seat... o never mind you have a coup... thats how i brought my t45 home from VA... 5 hour drive with no back seat and a tranny rolling around lol.

atrainsgt · Feb 17, 2008

The seats fold down.... To bad I don't have some exterior dimensions handy of a 4r70w. Okay lets get this back on track, I seriously hijacked this thread. So anyone making any 5.4L progress? I decided I can build 1 with forged internals for just a little more than buying 1 thats stock so thats what I'm going to do. Whats a decent price on a good 5.4L block? If I build the engine stock except for forged pistons and rods how much rwhp and torque will it handle safely? I have a single turbo in mind later on if it the power it puts out doesn't make me smile. Thanks again for all the help you guys have given me.

r3dn3ck · Feb 18, 2008

www.car-part.com for blocks. craigslist is also a good option.

Jrgunn5150 · Feb 18, 2008

Just calling your local yard can help too, but call the crappy yard. The yard that pulls them, cleans them, test them, then inventories them will want a premium for them.

voidfinger · Feb 18, 2008

+1 to J.R. I got quoted like 3500 for a 5.4 out of a 02 with like 140k on it... I was like you people are F'en stupid.

But yea, you will want to buy a complete motor... trust me... when a timeing set that is like chains,tentioners,and arms cost like 4XX ish... you will apriciate having that shit. Just buy it and tear it down then build it "better, faster, stronger .. etc etc."

1996mustangGT · Feb 19, 2008

i'vge found multiple 5.4's, all PI and complete for under 1K man...
just get that then start savin for a set of internals..
just my .02 cents...thats what im doin...

atrainsgt · Feb 19, 2008

r3dn3ck, could you possibly post some stock dyno numbers with that 5.4L? I just looked at a few while they were on f-150's and the best numbers I saw were 296lbs.ft torque. Thats not really worth the swap to me, I was expecting more. I really wanted to do this until I saw those numbers, that was a complete let down. I can get hold of a 4.6 4v just as cheap and might be easier to deal with, plenty of headers and intakes available already. I know you said I could expect 12's out of this swap but I just don't see it with those numbers I saw.

r3dn3ck · Feb 19, 2008

220-300hp, 330-425tq. Depends on a lot of factors. figure on about 270-280hp and 330-380tq for most common builds.

don't look for peak dyno numbers to scream out at you. There's a lot of area under the curve that you get with the 5.4 that's lost on the 4.6. When you read the articles you'll get a better worded idea of what's going on.

atrainsgt · Feb 19, 2008

330+ torque sounds fine to me and well worth it but thats not what I was seeing.

Jrgunn5150 · Feb 19, 2008

Man if you can't get 350 rwtq out of a mild 5.4 build, you just fail.

atrainsgt · Feb 19, 2008

I just hope my wrenching ability is up to the task of building this engine. I did the install on my gears so I think I'm capable. At first I wasn't planning on building the engine, just swapping 1 in. So I upped the difficulty level from what I first intended. Wish there was a way for me to bench run the engine before I install it after the build.