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.
Next: TD05...
