Turbo Lingo help

[TeamST_racing]

Hey,

Can someone help me with all this Turbo Lingo? Im trying to search (yes, I, one of those ppl who actually search ) "Turbo"

but I cant understand a god damn thing that people are writing...

What does T3/T4 mean?

And the "trim" size...

Im assuming that a .70 is a smaller turbo than a .50

I also know that a small turbo will spool up faster and a big turbo will give you top end...

"My non ballbearing 57 trim .63/.60 t3/t4 spools to 8lbs at about 3k, but begins to make boost around 2100 or so."

^^^ I stole that quote from a Turbo post and I dont even know what its saying.

Help me and thanks,
-Lam

[swerve]

(as taken from Garrett home page)
" Trim is an area ratio used to describe both turbine and compressor wheels. Trim is calculated using the inducer and exducer diameters.
Example:
Inducer diameter = 88mm
Exducer diameter = 117.5mm
Trim = Inducer2/Exducer2
Trim = 882/117.52 = 56 Trim
As trim is increased, the wheel can support more air/gas flow."

(as taken from z31.com)
Turbo: Another can of worms. You get what you pay for, if you go cheap you get cheap. If someone tries to sell you a 't3/t4 that makes 25psi' then run away fast. There are literally thousands of combinations of parts that can make a t3/t4 turbo - from one too small for a 2 liter honda to one that is too big for an 8 liter viper. Call a competent turbo vendor or buy a book on turbochargers and spec your own. A good turbo will run you $600-800 or so. Add $500 or so for ball bearings.

t3/t4 simply means a turbo with a t3 turbine and a t4 compressor. There is nothing magical about this. There are 4 t3 turbines and 4 t3 turbine housings. There are dozens of t4 compressors and housings. Do the math and note that "t3/t4" includes hundreds of combinations. Add in tricks like putting a t4 turbine in a t3 housing, clipped turbines, etc, etc. and you have thousands of possible combinations.

[eludedU95]

(as taken from Garrett home page)
" Trim is an area ratio used to describe both turbine and compressor wheels. Trim is calculated using the inducer and exducer diameters.
Example:
Inducer diameter = 88mm
Exducer diameter = 117.5mm
Trim = Inducer2/Exducer2
Trim = 882/117.52 = 56 Trim
As trim is increased, the wheel can support more air/gas flow."

(as taken from z31.com)
Turbo: Another can of worms. You get what you pay for, if you go cheap you get cheap. If someone tries to sell you a 't3/t4 that makes 25psi' then run away fast. There are literally thousands of combinations of parts that can make a t3/t4 turbo - from one too small for a 2 liter honda to one that is too big for an 8 liter viper. Call a competent turbo vendor or buy a book on turbochargers and spec your own. A good turbo will run you $600-800 or so. Add $500 or so for ball bearings.

t3/t4 simply means a turbo with a t3 turbine and a t4 compressor. There is nothing magical about this. There are 4 t3 turbines and 4 t3 turbine housings. There are dozens of t4 compressors and housings. Do the math and note that "t3/t4" includes hundreds of combinations. Add in tricks like putting a t4 turbine in a t3 housing, clipped turbines, etc, etc. and you have thousands of possible combinations.

good find dude

[DilutedImage]

Trim = Inducer2/Exducer2
Trim = 882/117.52 = 56 Trim

In case anyone is confused there, the 2 means 'squared' (not added/multiplied/etc) ... Perhaps this might be a little clearer:

(88 x 88)/(117.5 x 117.5) = .56 = "56 Trim"

2¢

Definitely good information though!

EDIT: I accidentally left the two on the 88 ... It's gone now ..

[j_lovett27]

Do u know how an turbo actully works?

[92DX]

Do u know how an turbo actully works?

Im not really sure of the details on how it works. But the main idea is the pressure from your exhaust drives the turbine which compresses air into your intake, giving you a shitload of air into your intake. The psi rating is how much the air is compressed.

[DilutedImage]

http://auto.howstuffworks.com/turbo.htm