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Old Nov 20, 2010, 08:31 PM   #1
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4b11 internals strength

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!!!
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Old Nov 20, 2010, 08:47 PM   #2
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Both are great engines. This has been beat to death. You won't have many problems with either. Use the search button.
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Old Nov 20, 2010, 08:51 PM   #3
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The 4G63 does not have forged internals. Not factory anyways.
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Old Nov 20, 2010, 08:53 PM   #4
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I have tried to search but havent seen any real evidence just more this motor or that motor bc thats what I own.
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Old Nov 20, 2010, 08:59 PM   #5
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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
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Old Nov 20, 2010, 09:53 PM   #6
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Originally Posted by awdturboscott View Post
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
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Old Nov 20, 2010, 11:21 PM   #7
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Kyooch, what makes you assume higher??
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Old Nov 20, 2010, 11:41 PM   #8
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I wouldn't push over 400wtq on either stock 4g63 or stock 4b11t.
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Old Nov 20, 2010, 11:59 PM   #9
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Quote:
Originally Posted by awdturboscott View Post
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!!!
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

Last edited by dreamerak; Nov 21, 2010 at 12:05 AM.
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Old Nov 21, 2010, 12:44 AM   #10
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I wouldn't push over 400wtq on either stock 4g63 or stock 4b11t.
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.
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Old Nov 21, 2010, 12:24 PM   #11
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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
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Old Nov 21, 2010, 12:28 PM   #12
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Kyooch, what makes you assume higher??
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
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Old Nov 21, 2010, 12:53 PM   #13
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in the info posted above they say the 4B11 rods are stronger then 4G63
What's the difference if the piston comes apart? The motors are failing in that power range.
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Old Nov 21, 2010, 04:04 PM   #14
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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
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Old Nov 21, 2010, 04:57 PM   #15
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What's the difference if the piston comes apart? The motors are failing in that power range.
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)

Last edited by dreamerak; Nov 21, 2010 at 05:00 PM.
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Old Nov 21, 2010, 04:57 PM
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