TD04 Turbos - Decodeing

Hey,

No tuning today :) just some turbo info.

Today I will write about the well known TD04 turbo family, I hear and see a lot of people refer to a specific turbo from the family as TD04 and that's it...

Well, TD04 range from very small turbos to quite big ones... less then 49mm upto 58mm.

Let me help you out.

Lets take the Volvo 850 T5 stock turbo, it is a TD04HL-15G, lets decode it.

TD04 is the hot side family, HL is the hot side wheel size, 15G is the cold side wheel size - k ?

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CHRA:

Center housing/hub rotating assembly

On the left is the hot side wheel and on the right is the cold side wheel.

A = Inducer

B = Exducer

TD04 hot side names and wheels sizes:

TD04      40/47 (A = 40mm, B=47mm)

TD04L    41.3/47

TD04H    44.2/52

TD04HL  45.6/52

TD04 cold side names and wheels sizes:

9B	34.8/48.79
11B	37.05/49
11G	37.97/49
12T	37.81/49
13T-4	38.3/51
13T-6	40.64/56
13C	39.9/52.99
13G	41.5/56
13T	40.64/56
15T	42/56
15G	43.37/56.01
16T	43.4/56
19T	46/58
20T	47/58

There are some hot side housing (turbine) designs, some are 2.75",3" or angled, what you need to remember is that all TD04HL will interchange with any other TD04HL turbine design, meaning, the CHRA from one TD04HL will fit another TD04HL even if its design is different.

But you can not cross interchange, TD04H will not fit TD04HL CHRA, you get the point - right ?

The cold side is wheel size limited, so you can not change a 13C CHRA with a 16T CHRA... you will need a bigger 16T cold side (compressor) housing.

**FULL** TD04 info :)

Next: TD05...