2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Do I have a td06 or a td07 25g turbo?

Old Feb 10, 2011 | 03:51 PM
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Do I have a td06 or a td07 25g turbo?

Hey guys, I have been telling people I have a greddy t67 25g turbo on my car forever, but I honestly can't tell what exhaust side I have

It is a 25g for sure, it has a 4 inch intake and a 2.5 inch outlet on the cold side

on the hot side it is a 4 bolt flange to the exhaust manifold and a 3 bolt downpipe

the letters on the side say DUCM 5f,

does anyone know how to tell if I have the TDO6 hotside or the bigger TD07 hotside?

Thank you!
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Old Feb 10, 2011 | 07:43 PM
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I have a TD06H-25G, and it has a greddy badge on the compressor housing that says that exactly. The hotside should have a stamp on it right where it bolts to the manifold telling you what size it is. For instance, mine says "16" indicating a 16cm^2 hotside.

Is the manifold T3 or T4 flange? I may be wrong, but i believe the TD06 are T3 flange, and the TD07 are T4.
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Old Feb 10, 2011 | 11:16 PM
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Hmm I took a few measurements of the flange, looking at a width of 4.35 inches, which i guess would make it a t3?

The only markings i could find on the exhaust housing were the ducm 5f, and theres a 5 with a 10 perpendicular to it. Haha strangest thing this mystery turbo!
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Old Feb 11, 2011 | 12:20 AM
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post a pic. you can tell a T3 from a T4 pretty easily if you compare the gaskets for the two.
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Old Feb 11, 2011 | 06:38 PM
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Sounds like a plan! I'll pull it this weekend and post some pics :p
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