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I/D of 20g?

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bcjjones

10+ Year Contributor
509
4
Nov 3, 2011
Austin, Texas
Starting to think I might have a bastard 20g. Just seems to pull much harder then most of the 16g's I see. Is there an easy way to tell? What would the inside diameter be of a 20g? Meaning the hole on the intake side of the turbo, how large would that need to be bored out to make the 20g wheel fit?
 
A picture would be helpful but as for it to pull harder than a 16g could be factored by to many other things as well like timing, other supporting mods, tuning, ect. But if your just seeing if you indeed have a 20g wheel then a picture would be helpful.
 
Last edited:
get your micrometer, pop the cover and see what you've got.

Turbocharger Wheel-Size Comparison
Turbo Compressor
Wheel Inducer Diameter(in.) Exducer Diameter(in.) Trim Housing

TD05H-16G "small" 16G small 1.830 2.365 60 TD05H-16G
TD05H-16G "large" 16G large 1.892 2.680 50
TD05H-18A 17C 1.900 2.680 50 TD05H-16G bored
TD05H-16G6 (Evo 3) 16G6 1.902 2.680 50 TD05H
TD05H-18G 18G 1.992 2.680 55 TD05H-18G
TD05H-20G 20G 2.070 2.680 60 TD05H-17C

This will help: Turbos, Turbo Selection 101
• View topic - ~ Mitsubishi Turbo Information ~ Sizes, models, & specs
 
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