Sorry for the noob question but Im debating on getting a IX or X and the only thing in the back of my head is 4G63 has forged internals and then on wikipedia I read that 4B11 has strengthened internals. Just wanted to get everyones opinions. Thanks!!!

 

Both are great engines. This has been beat to death. You won't have many problems with either. Use the search button.

 

The 4G63 does not have forged internals. Not factory anyways.

 

I have tried to search but havent seen any real evidence just more this motor or that motor bc thats what I own.

 

still searching for the forged internals, I think it was saying it about the IX but cant remember where I saw it, will post it when I find it

 

some parts of the 4g63 are forged, i forget which though. whatever the case, i think the general "safe" limit on the ix motor is around 450wtq or so. no idea about 4b11, i would assume higher though.. by how much, who knows

 

Kyooch, what makes you assume higher??

 

I wouldn't push over 400wtq on either stock 4g63 or stock 4b11t.

 

here's some 4B11 info
part one
http://www.turbomagazine.com/tech/08...b11/index.html

part two
http://www.turbomagazine.com/tech/08...ort/index.html

 

Agreed. I thought the 8/9 was a lot tougher but a local threw a rod with a Red so perhaps they aren't that different.

 

in the info posted above they say the 4B11 rods are stronger then 4G63

 

just because it's newer.. i would assume mitsu would go to some lengths to make the motor stronger. but yea 400-450tq on the 4g63 is prob the limit, and i dont think either motor can run much more for very long before theyre gonna pop. if you're thinking about pushing these motors to stock block limits you're gonna need to be ready to get the motor built some day anyway. in terms of ultimate power from a built engine the old 4g63 still has it

 

What's the difference if the piston comes apart? The motors are failing in that power range.

 

exactly.. it doesnt really matter what's "forged" and what isn't, it all comes together to form what the engine can hold in stock form

 

The diff is why, and what the failure point is. if I'm building an engine and the stock rods are strong and proven then, depending on my HP target i may use them and just replace the rod bolts and pistons. plus I was trying to stay on topic (4B11 VS 4G63)