[svostang]

Is it possible to have .57 trim wheel in .50 housing I bought my t3/t4 with the specs .63ar .57 trim .60 housing but the housing says .50 on the outside. The exhaust side says .63. The turbo does fine except it has some boost creep top end any input would be helpful. I would just like to know what it is so I am not fibbing when I say the specs.

[bhuff]

utt ohh, I'm guessing you bought it off ebay?
Thats the common thing I see with evilbay turbos. They have a .57 to4e wheel in a 50 trim housing.

[Stinger]

Actually, the .50 is the a/r of the housing, the wheel is a 57 trim...two different things.

[svostang]

well what does all that mean?

[svostang]

Is it possible? Any input on the boost creep I have?

[Stinger]

do a search, it's all covered in the FAQ section.

The a/r is the area/radius, basically the size of the housing. The trim is the size of the actual compressor wheel. They are in no way connected to each other.

[87Notch]

*sigh*
Where oh where do people keep getting the idea that the a/r ratio is the "trim"?

[Stinger]

From the ricers Scott...they are assumed to be the "turbo people" so whatever comes out of their mouth is the shizzle...

[Edit] for those easily offended, I'm joking...

[Kevin Doe]

Trim isn't really size of the wheel.

trim = inducer dia.^2 / exducer dia.^2

So, a very physically large wheel could have the same trim as a physically small wheel.

Check this page out for definitions.
http://www.turboneticsinc.com/glossary.htm


Hahha, and this info from a current "ricer"
Goddamn Stinger, you had like 2000 posts back when I frequented here. You're out of hand!!!

Kevin

[Stinger]

Easy now Kevin, "Size" is alot easier to understand than "inducer dia.^2 / exducer dia.^2" for someone that has very basic turbo knowledge, even if they don't convey the exact same definition...had I told him all that, he would have been asking what inducer dia. was, what ^2 meant, and what exducer dia. was I was just trying to explain that the two #'s he was confusing weren't related to each other.

I understand it's actually nothing more than a ratio and many different dimensions can yield the same "trim" or ratio.