External WG setup or internal? - Subaru WRX Forum
 
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#1 Old 08-16-2010, 10:30 PM
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External WG setup or internal?

Just posted a FP Green on Nasioc and got asked if the flapper was welded shut for external WG setup. I've rebuilt a block, but handled a turbo once before this guys, so sorry I'm kind of a newb to turbos. How do I tell? Here's the pics so we can get on the same page:Green turbo pictures by code72chase - Photobucket

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#2 Old 08-16-2010, 11:39 PM
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If you look at the picture you took from the back of the turbo, where the downpipe is bolted to, the little circle to the right is the waste gate. Some people weld that so it doesnt open to run an external wastegate, which is why they are asking. From the picture it doesnt look like it has been welded.
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#3 Old 08-16-2010, 11:48 PM
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Cool, got it, it's not. Now how do I tell whether it is a 7cm or 8cm back housing? I don't know what to measure... It has an 070 printed above it...

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#4 Old 08-17-2010, 09:03 AM
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Yep, as long as the flapper moves it's still good for IWG...

Now for 7cm or 8cm, I'm not 100% but it should be the diameter of the turbine wheel on the hotside, so the turbine to the left of the flapper.

Somebody confirm this?

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#5 Old 08-17-2010, 09:52 AM
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Sold already, but I'm still curious. that turbine measures 2 3/8". So... that converts to under 6.25 cm. I don't know...

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#6 Old 08-17-2010, 01:36 PM
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Originally Posted by Chase View Post
Cool, got it, it's not. Now how do I tell whether it is a 7cm or 8cm back housing? I don't know what to measure... It has an 070 printed above it...
The 070 indicates 7cm. All original Greens used 7cm housings unless it was a custom order to have one built with a larger hot side.
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