Audi 5000 external wastegate

[323driver]

Just purchased an Audi 5000 external wastegate to use with my 16G setup I'm working on. The valve is 30mm so I'm wondering if it will be enough. It will be used past the turbo with the turbo internal gate removed and hole enlarged.

Here are pics of the wastegate






Also, what is the purpose of the outer ring around the valve itself?

[ryan1]

i know alot of hmt guys used them,you should be fine.

[atomicEGT]

Lol, I have one of those! Maybe I should use it on something.

[therieldeal]

you do? why did you buy the turbonetics and try to buy the tial, then? LOL

it should work just fine. i have a 35mm tial gate and it flows more than enough. i have a 10 pound spring in there and i get no boost creep at all, all the way to redline.

[atomicEGT]

I forgot?

And I still want the Tial. :o

[FE3-323]

what is the PSI rating on that??? you'll need a custom flat flange & a gasket from the audi dealership in order to use that. if you weld a pipe into the hotside then the flange onto it you could make this work. i don't reccomend it exactly but it could work. either route you'll need a good welder who can work with cast iron & a new hotside flange & custom downpipe.

[323driver]

I'm building a custom downpipe anyways and have a friend who can make me a nice flange and gasket for free, so that's not an issue. I was more worried about the size of it but looks like it will be just fine.

That flex POS is coming off and I will build some custom piping instead. We'll see how it turns out.

[FE3-323]

it should work great! again do you have any idea the internal pressure of it??

[323driver]

I couldn't find that info... from what I found, it should be around 7-8 psi.

[323driver]

I'm confused... when drawing a flange for this, should I go around the big ring to leave it inside the pipe? The problem is that the distance between the bolt holes and the ring is non existent.

Can I make a flange with a smaller inlet that will go over the ring and will push it back in the WG housing to sit flush with the housing?

[FE3-323]

that ring you speak of is the "seat" of the valve that opens to allow exhaust to flow through. @ least thats how it looks. the flange should have a smaller hole then what the valve is A so a gasket can seal it & B so the seat has something to press against too