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Internal external ?

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kraus

Active Member
Joined
Jun 7, 2007
Messages
855
Question I have is just install 61mm p trim bb turbo,have internal wastegate.But on turbo I have a place to put blow off valve,if put one on said location will internal gate work , or do I need to buy new down pipe with external gate.I don't know what I have to do to use this method....

see pic bottom left two bolt flange for bov and poston 3 inch down with internal gate...

stuff050.jpg
 
What you see is the flange for an external wastegate such as the Deltagate wastegate and or Tial 38mm wastegate. That's not a flange for a blow off valve. If you want to convert to an external wastegate, you will need a new downpipe. You will need a downpipe that only has a 3" pipe coming out of it with a flange that will completely cover and seal the wastegate hole on the discharge side of the turbine housing. A blow off valve is used to vent the charge air from the piping when you decelerate or let off the gas. It helps to keep the turbo from surging. It is totally different than an external wastegate.
Hope this helps a little.

Patrick
 
wastegate

ATT355004.JPG

A waste gate on the compressor does not control boost as well as one on the exhaust. I put mine where the O2 hole use to be. In my opinion an external is way better than an internal.
 
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