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 **** 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 **** 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.

 

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.