2nd Generation Specific 1986-1992 Discussion

How Do You Tell An Upgraded Stock Turbo

Old 06-28-2004, 08:13 PM
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What do you need to look for on the turbo to tell if its stock or an upgraded stock turbo? Pics would be especially nice.
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Old 06-28-2004, 11:59 PM
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well the obvious tip off is if they used a different compressor housing.



you can sometimes tell if the stock housing is been machined because the lip the tid goes onto gets really thin, and its very thick stock (mines not even centered!)
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Old 06-29-2004, 05:05 PM
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The compressor doesn't look stock? I dunno i guess though for taht you'dhave to know what the stock compressor looks like. uhm...i cant think of anything i'll look at my turbo and come back later.
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Old 06-29-2004, 07:08 PM
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i have a stock s4 i can take a pic of later, DONT LET ME FORGET, unless it doesnt matter
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Old 06-29-2004, 07:22 PM
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Originally Posted by j9fd3s' date='Jun 29 2004, 08:08 PM
i have a stock s4 i can take a pic of later, DONT LET ME FORGET, unless it doesnt matter
is it later yet?
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Old 06-30-2004, 04:13 AM
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It's rather apparent. Even if the stock housing is retained, you'll easily be able to tell the difference between one that has been milled for a larger wheel and a stock housing.



Here's a comparison between a BNR stage II and a stock HT-18







Image station is being a turd burgler, so just right click the picture and enter the url into your browser.
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Old 06-30-2004, 05:29 PM
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Its showing up for me. Thanks, btw.
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Old 06-30-2004, 08:49 PM
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this is a stock s4. notice how the inlet "flange" is kinda thick, and not centered? if you bore out the stock housing for a larger wheel ( h trim cough cough) that gets real thin.
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Old 06-30-2004, 09:06 PM
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Thats just what I was looking for. Thanks. Bigger compressor housings are easier to spot than bored stock housings.
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Old 06-30-2004, 09:22 PM
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theoretically i can take a picture of a bored out stock housing, but thats more than walking out to the gay-raj
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