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Originally Posted by swift996
Does anyone know the spec on the turbo?
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Greddy 11500314 Turbocharger T518Z
GReddy exclusively uses GReddy Spec. Mitsubishi Heavy Industries, Japan Turbochargers, many of which are unique to us, including the popular 18G’s, compact TZ line and large hybrid T-power Turbos. It is well known, Mitsubishi turbochargers are among the highest quality turbos in the industry today. They utilize a durable center cartage, an extra large free-floating bushing with a large diameter center shaft. We believe this design to be superior to all other standard bushing turbos as well as many ball bearing types.
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T518Z = TD05H-18G
CWL = inducer 50.5mm, exducer 68mm.
TWL = exducer 49.1mm, inducer 56mm.
COMP HSG =
EXH HSG = 8cm2 or 10cm2
Looking for map
Edit :found best available
Read First This is the most accurate map I'm aware of
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Originally Posted by Danny50 on Aug/07/09 on Garret
Description: This flow map is my speculation based on horizontally squeezing and vertically stretching a MHI 20G map.
The 16G-large, 18G, and 20G compressor wheels all share the same 2.680" exducer diameter and differ in trim (and perhaps blade design): 50 trim for the 16G-large, 55 trim for the 18G and 60 trim for the 20G. In wheel "families" like this (same exducer size) higher trim usually means more flow and often lower maximum pressure ratio. Sometimes the higher trim wheel may have a bit less maximum efficiency than the lower trim wheel, such as seen in the Garrett T3 series (compare 50-trim and 60-trim wheels). So to make this map I reduced the 20G flow some and increased the maximum PR some. All "G" maps are somewhat similar in appearance so I think this speculative map may be a reasonable guess as to the MHI 18G performance. Coverage of demand lines is not as good as the 14B and 16G-large, but better than with the 20G. However, efficiency is probably better than either of the other 3 wheels. Note: This is the stock turbo for the GReddy turbo kit.
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