5.4 question?
 

Stroker kits are popular with the 4.6 crowd. There are a few companies that make stroker kits for the 5.4. My question is why doesn't anyone use these?

If bigger is better and more stroke = more power and torque, I'd expect to see more people using them.

Thoughts, comments, snide remarks...


Nevermind I did some more research and found my answer.

Aparently I can't delete my own post.

Yes but let's share the info with everyone else:

Stroking a 5.4 is exactly stroking a long-rod stroker. So it's redundant. The only time it's useful on a CAR is if you happen to have:

a big bore 3.7" sleeved block
4v heads
boost

Without a bigger bore the added stroke is going to shift the power peak further to the low end. It'd be great for trucks that tow heavy shit all the time and never want to rev over 4000 rpm, but for a car application it makes no sense.

can you bounce ideas off this questionwhich motor is the better stroker

i guess i should have said better to be stroked

As just right this second ... I don't remember the source but recently I ran across somebody advertising a "destroked" 5.4 engine kit for use in a 5.4 block. It seems it reduced the stroke somewhere between 3.75" - 4.0" (I think it was the 4.0").

Some folks may argue this is a step backwards but since Redneck explained it so well in post #2 I think it might be something somebody might want to try.

One point of note: The new 5.0 (3.70 bore) MOD blocks may not be big enough to handle the 4.0" stroke crankshaft, but the 5.4 block obviously can.

Too bad FORD hasn't offered a 3.70" bore 5.4 block. That would be SWEET indeed.

I think the destroked crank was made by Kellogg (???)

the best motor to add stroke to is the one with a tendency to NOT make enough low end power or one with too much head flow for the bore width. Technically speaking, I'd say the best motor to stroke out a half inch would be a 4.6. Stroking a 5.4 is almost just plain silly. Most modular 5.0L engines are just stroked and bored 4.6's so again, redundant.

destroking a 5.4 gives you the option of using a longer rod for even better efficiency and a wide power band. Look up long-rod-stroker on howstuffworks.com ... watch for porn hits if you google it.

The stock Stroke on the 5.4 is 4.16 inches, the only stroker kit I have seen makes it 4.5 inches.

LUNATI HAS CRANKS !!!
 

I tore thru all my magazines today trying to find out who did what crank (see post #5 this thread). I found the magazine and will post the Lunati part numbers on here tomorrow for future quick reference. Very impressive. They had a a destroke for the 4.6, std. for 4.6 and 2 stroker cranks for the 4.6 enigne. The 5.4 is offered with 1 destroke, std. stroke, and an extended stroke. Very interesting. I'll post all the data.