Is it likely that my 03 N/A 5.4 has a forged crank, or does it most likely have the cast crank? I need to know because I am planning a Lightning supercharger setup, and I need to know what my limits are. Is there a way to physically identify what i have by the way the crank looks, or sounds when it is striked, or by my vin number? I know that the forged is good for 900 hp at the flywheel, what will i be looking at if I have the cast?

If i do actually have the cast crank, where would I go to to find a forged crank?

 

i think judging by the year its cast.
cast is safe to 500.
i bought a forged one through ford racing parts, you can actually get the same crank from jegs. ordered for about the same price.

 

hmm... what would be the easiest way to check visually which ones i have? basically, i am asking what method would involve the least work of disassembly to see what i have? dropping the oil pan to check, or just start tearing things apart? i found pics for comparison in this thread, https://www.f150online.com/forums/sh...ged+crank+pics

 

get the casting #? i called my ford dealer with the casting # and got told it was cast.

 

Justing thinking out loud...

If it has a casting number then wouldn't it be cast by definition?
I can't imagine a forged crank having a casting number...since it isn't cast. Perhaps a forged crank would have a forging number

 

where is the casting/forging number and what do i have to pull to be able to read it?

 

I have the stock crank out of my 03 5.4 ,out in my shed.
I just went and looked,,and,,according to the link you posted,,it is a forged crank!
If you drop your oil-pan,,,you should be able to tell .

Phil

 

between the journals somewhere. cant remember which end showed the ford part #. basically flip it over pull the pan and rotate it till u see #'s
if i had my cast crank here still i'd post my # and if it matched urs, then u would know u had a cast crank.

food for thought, cast cranks were being mixed in @ 2002? not positive but you'l have to search that one. i thought the 97-01's were forged.

 

phil 6608, are you saying your stock crank was a forged one? if you don't mind posting the numbers for a reference, that would be great. if it is indeed forged, are you willing to sell it if I need it? looks like i'll be pulling the oil pan to see what I have...

 

Yes,,it's forged ( as long as that pic you posted is right ).lol

I don't think I want to sell it,,,it would be just as cheep to order a new one from Jegs by the time you add shipping and all.

Phil

 

this is starting to worry me, i read somewhere else that a crankshaft managed to fail on a Bone Stock 03 5.4... the engine got totally f--d up. and i'm planning on running a blown setup, i'll definitely be upgrading to the forged crank it turns out i have the cast.

 

http://www.jegs.com/i/Ford+Racing/39...1/763222|11221

 

Found this number for the forged crank:

5.4 forged steel crank
F75Z-6303-AC

 

If you cant see the pic good,,the number is,
WF (with the F connected to the side of the W)-2921
And the other number is F75E-A176

In this pic you can see how wide the line down the middle is. And according to what people are saying,,that means it's forged.



Phil

 

WF = Woodhaven Forge.....the Ford plant that made the crank.

03 5.4 2V's used both the cast and forged cranks.