whats the 5.4l bottom end made of

does the f250 use the same bottom end as the lightning??

 

no, f250 5.4 is not the same as the lighting. I thought the lighting engine was aluminum block and heads. 5.4L in F150 and sd's are Iron block and Aluminum heads.

Are you talking connecting rods and crankshafts when you say Bottom ends?

What year F250?

 

Oh, also, 5.4L non-lightings are cast cranks and rods I believe. Lightnings got forged cranks, rods and pistons, I think.

They had to withstand a supercharger and 500hp

 

Im tryying to get a lightning 5.4L stuffed in to my thunderbird (see avatar)
all I know is 99+ on what ever I get the ex just got the new mustang wich wile I'm faster then it with my explorer heads and intake I want to crush it
Im at about hp325 with my old 4.6l

 

1999+ Lightnings had MOD C38 forged steel cranks, low compression forged aluminum pistons, and powder metal forged rods. All had the same iron blocks, heads and cams as the regular 5.4L Tritons. Only aluminum 5.4L Ford has out is in a $100,000+ supercar.

Non-Lightning/Harley Davidson 5.4s had either cast steel or forged steel cranks. It's a complete toss-up so the only way to know for sure about your truck is to look at the crank itself. Most of the 4V Navigator 5.4's have forged cranks...but not all. The cast cranks are plenty tough so it's not a problem either way. They are a bit lighter and unless you plan on pushing 900hp+ with a power adder it's probably the better crank to have. All non supercharged 5.4's have cast hypereutectic pistons and powder metal forged rods. It's said that the Lightning/HD truck's rods had more material in the big end but not enough to really matter.