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Ok I've had a search here, and I couldn't seem to find anything related to this dumb question I'm about to ask... what is this stage 1 turbo, stage 2 turbo etc business? Yes, I know it's a dumb question, but hey everyone's gotta start somewhere

 
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you might have been reading the different stage cybernation kits for K20 swapped vics. Or it might have been a generaliztion of stage 1: just boost, and stage 2: boosted with internals. Etc

 
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If you hear "stage" it generally refers to the turbine wheel.

 
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You don't know either do you....Turbo Stages can mean a range of things. You can call a Stage 1 Turbo one thing and it may mean something different to someone else. Various "stages" use various components. Turbo XS has Stages 1-4 on the UTEC for WRX's. A ECM (UTEC) has turbo stages also. EternalBlue is right, it also has to do with boost, boost stages. Turbo stages is very vague. I guees what I'm saying is that their is no real textbook defitnition that I know of. There are various meanings. Keep searching go to clubrsx.com and some subaru boards and you may find more info. GL.

 
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I don't get to hear that very often! Rep for that!!

 
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Okayyyyy...Thanks Dooood!! Props to the Eternal Blue owners, I got ur back. We represent.I'm out.

 
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There are different stage exhaust turbines for turbos. The most common turbine in a t3 is a stage 1. It is in just about all T3's regardless of the .ar rating on the exhaust. Basically, the higher the stage, the larger diameter the exhaust turbine is. Then you have the trims. The trim is sometimes designated by a number, but most commonly designated by a letter (example, T3 turbo with a Stage 3 "P" trim turbine).

Now i have also heard the phrase "i have a 67 trim wheel". Basically that means that they have a 67mm inducer on their compressor wheel. And they can have a specific AOA (angle of attack) on their blades. The more aggressive the AOA is on the compressor, the quicker the spoolup time, but the lower maximum airflow. So you have to balance the AOA to achieve the spoolup and airflow that you want.


We have all heard the phrase "Stage II Turbo". Basically that is some Grand Turismo ricer crap. It is like the "Nawz" of the turbo world. Just like there is no "nawz", there really is no set "Stage II Turbo". Some manufacturers specify their turbos as "Stage I, II, etc", but it is really only to organize their parts in order from cheap to expensive.

 
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^^^ well put!

 
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Look through the turbonetics catalog for instance, the only "stage" referred to is the turbine wheels.

 
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thats just in that catalog. There are many, many other meanings and references to "stages".

 
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werd......... stages refer to certain upgrades

stage 2 could have a bigger intercooler than the stage 1 and/or have a bigger turbo........etc..

 
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Yup, so basically you should tell us where you see stage then we can look at it and tell you what it means. I'd say 9/10 times though stage refers to you getting more parts the higher the stage (hey whered stage -1 go lol i can't afford 1)

 
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Agreed, but he asked about a turbo, not a kit.