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How to determine stage?

1221 Views 18 Replies 9 Participants Last post by  Tony D
I did some Googling on what defines a stage, but I got some questionable results. Even some conflicting. Some sites said certain HP numbers, some said each mod counts as 1 stage, some said the complexity of the mod.

So how does one know what "stage" his/her car is?

I see advertisements claiming "stage 1, stage 2, stage 3, etc" for aftermarket parts.

Well what exactly does it mean, and how do I tell what "stage" I am?

It's not that I particularly care to assign a stage label to my car, but I'm just curious how it works and what defines a "stage."
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From mild to wild! That's how I look at it. A stage I being mild a stage III being wild. Like a clutch for instance. A stage I clutch is more for stock purposes. A stage III would be more for race application's. Atleast that's how i see. That's just a small example. I'm sure others may have some more ideas on subject.
"Stage [anything] = a wet-dream for those who know little.

There is no significance at all. Its really, IMO, to help people who have no idea what they are dealing with, want something. Why would an ignoramus want a segmented clutch, or X compound vs Y? He would not... thus, they call it 'stage I', 'stage II', etc. This way dummies can tell a difference. Using such a title also allows the company to piggyback off movies like tF&tF. To boil it all down; American consumerism.

If you see "stage x" (x being a variable not 10) you have to go to the companies website and correlate the reference to a specific product. You will never know what it means otherwise. As a whole the use of the term is completely arbitrary, subjective at best.

As far as an overall project (the car), there are no 'stages'. No standardizations exist for stage levels when applied to a car as a whole.
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Whoa! androitcaptor easy! I thought I was in an advanced math class for a second. Yeah don't worry mutch about that stage crap! Just build up your car how you want it to look. A clean well taken care of Z is awesome on any stage ;)
"Stage" is a marketing term and meaningless unless you're referring to a coach drawn by horses, a place for people to dance, or a section of a rally race.
Well said John.
Thanks guys.
I had a guy accuse me last week of not knowing what I'm doing because I couldn't tell him the "stage" of the turbo I'm putting on my L28. He is car guy but he pays people to do his work. He has several turbocharged imports that he bracket races occasionally. They all have some aftermarket turbo kit that has some stage designation attached to it.

Wannabe: "So what stage is your turbo?"

Me: "I don't know, it's a T3/T04E with a .63 turbine and .50 compressor."

Wannabe: "But I mean what stage is it, you know, I II or III"

Me: "I don't know."

Wannabe: "Sounds like you arent' doing much research into this project"


I wanted to slap him but he is actually some sort of supervisor at work, so I just let him tell me about the various "stages" of turbo's he has on his cars.
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Tell him its a brand new kind, A stage 5 turbo. Its much better and more powerful than his stage 1,2 or3 ones.Tell him it's a research test model that isn't available to the public yet and you have friends in the automotive research world that are so impressed with your Z that they wanted it tested on it. And that maybe in a couple years when it's available to the public he might be able to get one too.That ought to shut him up.
cannonball89 said:
I had a guy accuse me last week of not knowing what I'm doing because I couldn't tell him the "stage" of the turbo I'm putting on my L28. He is car guy but he pays people to do his work. He has several turbocharged imports that he bracket races occasionally. They all have some aftermarket turbo kit that has some stage designation attached to it.
This is a good example of 'stage xxx' standing for something but being completely subjective.

[from my understanding]
Several turbo manufactures use this term to describe the how wide the turbine wheel is (sometimes the compressor wheel also).
This feature affects the restriction of exhaust gas out the turbine outlet. This is used to further control at what flow rate the turbo is most efficient.

That said, it is reasonable to assume, from your description, that he has no idea what he is talking about.
It's purely a marketing bullshite term, and means nothing.
Kind of like 'Series 1 240Z' which has gained popularity in the USA.
Anywhere else in the world they laugh at that...

Same goes for 'stage' ratings.
adroitcaptor said:
Several turbo manufactures use this term to describe the how wide the turbine wheel is (sometimes the compressor wheel also).
Which ones? I worked on and off at Honeywell in Lomita, and they don't use it in that respect. That's all still engineering geekspeak at that point. Once you get to distribution (even 'authorized distributors') then marketing terms come out...
I wi
Tony said:
Which ones? I worked on and off at Honeywell in Lomita, and they don't use it in that respect. That's all still engineering geekspeak at that point. Once you get to distribution (even 'authorized distributors') then marketing terms come out...
I will buy that for a dollar.
My intent was more to point out when someone would see the term used for a particular something on the purchasing side since we all deal with marketers. (I mentioned clutch plates in my first post.) I know nothing as far as what the manufacturer uses to delineate said parameter/measurement.

Just trying to be helpful... guess that is not good enough for TonyD. Someone come save me from this forum tyrant!
(seriously tho, fair correction)
adroitcaptor said:
I wi
Tony said:
Which ones? I worked on and off at Honeywell in Lomita, and they don't use it in that respect. That's all still engineering geekspeak at that point. Once you get to distribution (even 'authorized distributors') then marketing terms come out...

I will buy that for a dollar.
My intent was more to point out when someone would see the term used for a particular something on the purchasing side since we all deal with marketers. (I mentioned clutch plates in my first post.) I know nothing as far as what the manufacturer uses to delineate said parameter/measurement.

Just trying to be helpful... guess that is not good enough for TonyD. Someone come save me from this forum tyrant!
(seriously tho, fair correction)
Nothing TonyD said in this thread was tyrannical. And was in fact helpful. Thank you Tony.
lol yeah... I know...
Read "(seriously tho, fair correction)" and "I will buy that for a dollar."

I will always give Tony a hard time. 'Everyone' else does and he has come to expect it. Perhaps YOU are O.K. with letting him down; I sir, am not.
adroitcaptor said:
Just trying to be helpful... guess that is not good enough for TonyD. Someone come save me from this forum tyrant!
(seriously tho, fair correction)
Hey, spend that time on people like John H who spout incorrect 'corrections' that are soooooo off base it defies logic!

I noticed some time ago people starting with 'Stage' questions. To someone in engineering it's maddening to hear such talk as there is nothing defined about it. I mean, SEMA is a MARKETING (instead of 'manufacturing') org. now right?

Here's a radical idea:

SET A SEMA STANDARD FOR "STAGE" TERMINOLOGY:

ENGINE MODIFICATION CRITERIA
Stage 1: Minimum 10% maximum 25% RWHP increase over stock
Stage 2: Minimum 26% maximum 50% RWHP increase over stock or minimum 1% to 24% over Stage 1 RWHP...
Stage 3: Minimum 51% maximum 75% RWHP increase over stock etc
Stage 4: Minimum 76% maximum 100% RWHP increase over stock etc
Stage 5: Minimum 150%
Stage 6: Minimum 200%
Stage 7: Minimum 300%
Stage 8: Minimum 400%

****, by these criteria, I've built 'Stage 8 Turbocharged Type-1 VW engines!"

But ****, how hard would it be for a MARKETING ORGANIZATION to give a "SEMA STAGE1" criteria, and even separate it from NA and Turbo?

THey are the 'market leader' why the fu*k won't they LEAD?

Feel free to pass this rant on to them via their website suggestion and contact forum...
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