BLKTOPTRVL

OK, so maybe I need a ported wastegate (boost creep). I don't see anyone on-line who sells one?

Anyone know of a manufacturer?

I would think that if this were a common need, I should be able to find one easy rather than make my own - with god knows what results.

mmonaco

You take yours to get machined if you have a stock one! Just have them open it up, while your at it might as well go non seq.

BLKTOPTRVL

That's my point. I would think that if this is such a common need, then why isn't someone selling them - perhaps an opportunity for someone out there with machining skills?

As for going non-seq, thanks, but I have no interest.

Marshall

The wastegate is an integral part of the turbo housing, you can't just sell them like they're a seperate part. Even so, the mod is so simple that the shipping would cost more than the machining.

BLKTOPTRVL

IC, so this is something that would best be done while disassenbling/rebuilding the Turbos?

How do you know how much material is enough/too much to remove?

As I understand it, this (boost creep) is only a problem if your exhaust is too open. Maybe I should check for exhaust leaks? I don't hear anything different, but I think I will take a look.

Marshall

Yes, it is best done when you have stuff apart. Until then you need to keep some restriction in the exhaust. If I remember correctly, the hole needs to be machined to 1.24" I eyeballed mine with a dremel and haven't had any problems -I just scribed a line in the metal where the wastegate door sits when closed and enlarged the hole until it met the line.

Marshall

BTW, you shouldn't be getting creep with just a downpipe. How are you controlling boost?

BLKTOPTRVL

You put your right foot down, you put your right foot up, you put your right foot down, then you look to your boost gauge...

I do the hokey-pokey...

To be serious, since I have owned the car - three years, I have been running right around 12 lbs (as displayed on the gauge). It is only recently that I have been seeing 15 lbs so I have to assume that something in the exhaust has opened itself up.

Or, as someone else suggested, perhaps my boost gauge has decided to check out. I was thinking about buying a vaccum gauge for my convertible, but before installing, I thought I'd run it in tandam with the boost gauge on the TT to see if they track together.

That may not give me a full diagnostic report of the boost gauge, but I would be able to see if it is even close, while buying something I need/want for the convertible.

BLKTOPTRVL

The story continues...

Friday I started the car. There was a loud screeching noise that I am hoping was the drive belt. I have not heard it since.

mor

I just ported my wastegate and didn't go as aggressive as some of you. I left probably around 1/8" smaller than the flap. Is that too much to leave? I was concerned because there are signs of previous cracking. Also, the flap moves around so I left a little bit of margin. What do you guys think? I already reinstalled the turbo assembly and don't really want to take it apart just to open up a little more if I don't need to.