how to know the trim?
 

how to know the trim of my turbo charger? all data i found is:
gareet t3/t4
t04e
and serial xxxxxxx
a/r 50

so how to know the trim ?

Re: how to know the trim?
 

measure the inducer and exducer and do some math

trim = (inducer diameter / exducer diameter) 2 * 100

Re: how to know the trim?
 

The actual formulae to calculate the trim of a wheel is:

trim = ( (inducer diameter) 2 / (exducer diameter)2 ) X 100

---- I am just realising now that squaring the measures before or after dividing them makes no difference at all. Funny... I always thought it HAD an influence on the result.

Re: how to know the trim?
 

Squaring the numbers prior to or after the division makes no difference, you'll get the same result either way.

Ex. Inducer = 10
Exducer = 21

102 = 100
212 = 441
100/441 = 0.22675736961451247165532879818594
0.22675736961451247165532879818594 * 100 = 22.675736961451247165532879818594

10 / 21 = 0.47619047619047619047619047619048
0.476190476190476190476190476190482 = 0.22675736961451247165532879818594
0.22675736961451247165532879818594 * 100 = 22.675736961451247165532879818594

Re: how to know the trim?
 

my eyes!!! :S

Re: how to know the trim?
 

Thanks for carrying it out to that 32nd decimal place. 31 just isn't accurate enough for me.

Re: how to know the trim?
 

No prob. I just thought 64 would be overkill ;)

Re: how to know the trim?
 

sorry if i ask can you send me a pic and tell me what is the inducer and the exducer
to can measure them .? sorry because my english is not good.

[

Re: how to know the trim?
 

You have to take the compressor housing off. The inducer is the front, smaller part of the compressor wheel and the exducer is the larger part that pushes the air into the compressor housing. A digital caliper comes in real handy for this part.

http://users.adelphia.net/~purecrxta...o/comptrim.JPG

Re: how to know the trim?
 

ok thank you alot PureCRXtasy for your attention . i will do it.

Re: how to know the trim?
 

The Exducer of the compressor wheel is also called the MAJOR by garrett and turbonetics themselves.

Why they call it "major"?
To avoid confusion with the turbine wheel, on which it's the opposite way around: the small diameter is the EXDUCER and the big diameter is also called major

Re: how to know the trim?
 

As long as you remember:

IN=air in EX=air out

There really shouldn't be any confusion. It's universal to both the turbine and the compressor. It's good to know there is other terminology used in case it comes up though.