Explain some nomenclature to me real quick...

[neat]

I've read 'Maximum Boost' and have a decent understanding of how turbos, pressure ratios, and intercoolers work; but I don't understand some of the lingo.

For example, a TA49-

I assume the 49 represents the size of the impeller wheel, in MM. Where is it measured at? The widest point, IE closest to the center housing?

What does the TA signify?

On a TE44, I assume that's a 44 MM compressor wheel. What does the TE mean? I would think the exhaust side would be almost as important as the compressor side, how do you determine the specs on the hot wheel?

A/R is the distance from the wheel to the inner side of the housing, right? What does A/R stand for? Where is it measured? At the largest point on the wheel?

A T3 VS a T4 turbo? What does T3 or T4 signify?

PT6776- What does all that mean?
Is there a website that explains all this stuff?

 

[turbo2nr]

http://www.turbobygarrett.com/turbobygarrett/tech_center/tech_center.html

 

[ghall]

Josh,

Wow---what a post.

I am sure most of your questions will be answered!
The TA is for stock apper. turbos(bolt on inlet bell) the te series is aftermarket stuff---A te-44 performs just a bit better than a ta-49.....
prolly want to do some searches...this gets pretty confusing.


We will in your neck of the woods in the next few months......at the T-N-T session hopefully...PM me for details :smile:


Geoff

 

[turbo2nr]

You guys come to the T-N-T at Rockingham on the 8th of Oct.

 

[ijames]

Neat (?), turbo names in the TR world are mostly just made up, and usually don't signify wheel size or trim until you get to the T series, 66 mm and up. There is a table in the tech area at www.gnttype.org that lists most of the info, and PTE's website now has lots of sizes as well. Then there is the TA vs TE: TA turbos use a stock appearing howing with bolt-on inlet bell while the TE housings have the bell cast in and flow a little more. In the "old" days stock appearing was a real big deal, while nowadays most people don't seem to worry about that so much and just want hp.

 

[neat]

That link was pretty helpful. The number doesn't designate anything that is consistent between manufacturers, it's only a model designation.

A GT25 and a TA49 could be almost identical. It's just a model number used by the turbo company. You have to be familiar with the turbo company to know what the different models are. It's like an F-150 and a CK-1500. Both are 1/2 ton trucks, but you would have to be familiar with Ford and GM to know that.

Geoff, you have a PM.

 

[Sal Lubrano]

http://turbobuick.com/forums/showthread.php?t=110713&highlight=te-45a

http://turbobuick.com/forums/showthread.php?t=93074&highlight=pt-67

Both links have your info all wraped up and explained. Good luck