New Garrett 3.0 Turbos Compare to S400SX and Save Perfect for Twins

SuperiorRam

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Dec 5, 2008
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Here we have two AiResearch (Garrett) Turbos
Model T18A15
Part # 207420

Compressor Wheel Inducer 74mm
Compressor Wheel Exducer 127mm with A/R .96
Turbine Wheel Inducer 95mm
Turbine Wheel Exducer 126mm with A/R 1.00
5.5" inlet
3.5" outlet
5" exhaust
T-6 flange
The paint is flaking but they have sat on my shelf for a couple they are in there original paint and I took off the packaging tape off to measure these turbos. They are new (or reman) never used and are clean tight turbos great for a primary and should move more air than a S400 easy

Make a reasonable offer and there yours one or both I'll package nicely and ship


Here are S400SX specs
Compressor Wheel Inducer-75mm
Compressor Wheel Exducer-100mm
Turbine Wheel Inducer - 83mm
Turbine Wheel Exducer - 74mm
Turbine Wheel Trim - 79
Turbine A/R - 1.10
Horsepower Rating - 500-1000
The cheapest one I found is about $1100 (genuine)


s300002.jpg


turboss001.jpg


turboss002.jpg


turboss003.jpg


turboss004.jpg


turbos003.jpg


size compared to S300G

s300001.jpg


s300003.jpg
 
Those wheel sizes look pretty far off of an s400sx...
Closer to a standard s400.

Seems like the exducer and inducer on the turbine is switched.

Might make an interesting single on a 3.0 truck, with the big turbine and the small a/r turbine housing.
 
Last edited:
Sorry, I'm not the pro here by any means so is 650 shipped to much that's what I told the last guy
 
So the comp is a 3x5 and the turbine is a 4x5? Your pics are blurry.
 
please elaborate:nail:

The latter part of his comment is related to the vanes on the portion of the backing plate under the compressor wheel. The diffuser is the portion of the turbo that directs the air out the compressor outlet from the compressor wheel.
 
Thinking about it. Can't seem to find any compressor maps.

You prolly wont, they are hard to find. I have a turbo that I run that is similar to these on the compressor size, it makes around 45psi on a 893cid motor.
 
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