someone on here said the 5.4 and the 4.6 are the same its just that the 5.4 has a longer stroke.. which gives it the extra .8L displacement.

heres the bore stoke for the 5.4 and 4.6

4.6 = 3.55x3.54
5.4 = 3.55x4.17

also the 5.4 has higher compression.

and the heads on the 5.4 are aluminum

otherwise they are the same.

 

idduno - it's still setting at the desk in the house lol - haven't got to it yet , just took the pics and left again. I'll give her a try tonight - doin my calipers at the moment - out in the barn - I was thinking , I just Amsoiled the **** out of this truck - replaced all the freakin fluids, the tranny heats up enough to cause just a little bit of shudder on the takeoff - I'm thinking it's converter shudder for sure and thinking about trying just to change that out for a try instead of the whole freakin trans - what do yuh all think?

 

I once thought the 5.4L was just a stroked 4.6L - It's not !! There's more to it , I for one can't explain - Neal has explained this before, JMC,triton,steve,bluegrass and maybe faster can but I can't recall or define.

 

I gotta $25 off coupon for Auto Parts Warehouse if anyone can use it - it's yours , email me. I'm set and it's only good till Christmas - figures

 

Thats stock stuff. I am talking about BUILT motors with major power, same compression ratio, same this and that. If the only thing different is the stroke, then what is THAT difference going to make between the two motors?

 

im a diy boy. i've always learned by doing things with a little guidance. i figure between me and my father we can build this 5.4 and get some respect from him when it comes to automotive.

i figure i COULD pop this motor out by the end of the month, but i do have other things going on so im gonna draw it out til about my b-day, that gives me 3 more months of wages to work with and not feel like im cutting the 67 fairlane out too much.

now explain to me what is the difference of me buying the tools as i come across the need of them and doing it right vs paying some schmuck i dont trust around here to do it? i know NONE of the engine builders in these parts.

 

uh if im thinking correctly, a longer stroke will give more torque?
maybe i need a lil more edumacating?

 

The (2v) 4.6 and 5.4 both use the same head. They both use the same pistons. The do, however, use a different block, intake, rods, and crank (5.4 has a steel crank, 4.6 is not).

I don't know what their cam profiles look like, but I would imagine that are either very close, or identical.

Of course a Windsor and Romeo will have other, more fundamental differences, but for the most part, the 4.6 and 5.4 are extremely similar.

 

Klitch... I can only speak from personal experience, but just because someone can build a chevy 350, doesn't mean thay can build these modular motors and get them to stay together like they should. Example.. Neal, and the first guy who screwed up the motor that was in my truck. Not saying that you can't do it, just saying it aint as easy as it is with other motors. I could have had the motor that is going in my truck built around where I live for half of what it cost me, but at least I know it's done right.

 

HAHA - can never have enough of that- WOW! I can FLY!!! sry , new keyboard in action - speedy thing !! fricken caps don't light up , just always liked that.

JBRAVO - Buy your tools , keep going , no one out there is going to do the job that you yourself can when it comes to working on your own stuff. Keep it up.

 

Neal didn't scew it up , he put trust into a builder and got screwed , wasn't his fault. - better fix that.

The modulars a different breed when it comes to details , you can' t leave any out or you'll learn the hard way - do it right and you'll reep the reward.

 

Cubic inch per cubic inch, it's actually the exact opposite. Stroking leads to a lower rod ratio and less torque.

But what it does do is increase displacement. With a higher displacement, the engine can burn more fuel and air, all else being equal. So you give up a little rod ratio, and achieve a less efficient mechanical process, for a higher displacement in order to achieve a few more horsepower and a little more torque.

Making the engine more efficient, rather than increasing displacement, is a far more effective way to gain power. Really, the only time you start looking to increase displacement to gain power is when the engine is already as efficient as possible, and these engines are a FAR CRY from being as efficient as they can be.

There is no excuse in the world why these little 4.6's shouldn't be making the kind of power that their 3v 5.4 brothers are, none at all.

In truth, the 5.4 should not cost more than $40 extra to produce than the 4.6, but they charge a great deal more than that for the engine option. During the manufacturing process, you are literally only looking at about $25 more to build the steel crank, and maybe $.20 per extra pound for the larger block. The difference in cost for the rods is negligible. However, people are much more likely to spend the extra money on the larger 5.4 than another, more efficient version of the same 4.6 (eg 5.0 vs 5.0HO)

The reality of the situation is that the 4.6 and 5.4 are both nothing more than selling points. There is 0 need to have both engines on the market. It is only a way to make a little more money. Either the 4.6 or 5.4 alone, made more efficient, should be the one and only standard in the Ford V8 1/2 ton truck arena.

 

That's what I am trying to explain to Klitch. VT Engines built my new motor. A dumbass in NC screwed the original motor up. Wasn't my fault either. Not just anyone can build these things and get them to stay together.

 

Yeah, I don't know for sure , but the differences in details withe modular vrs any other must be easy to overlokk for the "jack of all motors" when it comes to a the build.

Man this keyboards cool triton - it has that bumper bar and zero lift , much better for typing - resting on the bumper your fingers auto hoover the keyboard perfectly.

Maybe I won't hasto idit som munnch !!

 

wtf

Well, I sort of expect that kind of nonsense from a mac user.