Engine Swap- 2005 in 2004 4Runner?

[DiskDoctr]

Here's a thought.

Because of the weaker internals in the 2004 v8, has anyone done an engine swap, putting a 2005 4.7l into a 2004 4Runner?

Assuming you also changed the ECU for a 2005, any other issues?

-DiskDoctr

 

[T4RUSAF]

Ultimately I would say it wasn't worth it. With the 2005 engines you aren't addressing the weak rods. In fact, introducing VVT-i into the equation only makes it worse because of the higher compression ratio that accompanies VVT-i. Your best bet it to get better rods. Lextreme makes some STOUT rods so that would solve your problem. Heres a link:

Lextreme

A waaaay cheaper solution would be to get some rods from a 1uz motor. The 1uz's have thicker shafts compared to our current 2uz engines.

 

[sharp4runr]

The 2004 4.7l V8 has weaker internals? Can you point me to more info? I hadn't heard myself...

 

[DiskDoctr]

The 2004 4.7l V8 has weaker internals? Can you point me to more info? I hadn't heard myself...

Sharp,

Talking about the weaker rods issue. This has been posted in many forums, but check out these articles:

Lextreme Toy/Lex Rods comparisons

And this one:

Lextreme 450-500hp max

I was thinking about replacing the rods, but due to the amount of work involved, balancing issues, $$, etc, I am planning to tune to a max of 400hp.

That still gives better than 10% cushion, and I may not be making that anyways. My target is 375-400hp (with ~21% loss I've seen quoted for the drivetrain, that's about 300-320 rwhp)

-DiskDoctr