Question about wastegate vacuum..
Question about wastegate vacuum.. Long story shirt. First turbo build just completed. Car had some issues with the computer so I had it re pinned to the 99-02. I never knew that their had to be a vacuum source running to the gate until last night. I've read most threads I could find on it today but still have a couple questions..
What does the vacuum line do? I thought the gate just simply released pressure when it hit X amount. Secondly, when i picked the car up last week, the turbo was spinning slower than I imagined it would and even when revved up to around 2500, I never heard the slightest sound coming from it. Would this be the cause? Turbo is a GT45, Emusa BOV and gate.
What does the vacuum line do? I thought the gate just simply released pressure when it hit X amount. Secondly, when i picked the car up last week, the turbo was spinning slower than I imagined it would and even when revved up to around 2500, I never heard the slightest sound coming from it. Would this be the cause? Turbo is a GT45, Emusa BOV and gate.
The wastegate has to have a reference or it wont know what pressure to keep. And i can rev my car to 5000 and it wont spool at all. Thats becuase you are not producing a load to produce heat to spool the turbo. some one correct me if im wrong about the wastegate and other stuff cause im defiantly still learning also.
The wastegate has to have a reference or it wont know what pressure to keep. And i can rev my car to 5000 and it wont spool at all. Thats becuase you are not producing a load to produce heat to spool the turbo. some one correct me if im wrong about the wastegate and other stuff cause im defiantly still learning also.
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Joined: Nov 2003
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From: Norn Iron
Long story shirt. First turbo build just completed. Car had some issues with the computer so I had it re pinned to the 99-02. I never knew that their had to be a vacuum source running to the gate until last night. I've read most threads I could find on it today but still have a couple questions..
What does the vacuum line do? I thought the gate just simply released pressure when it hit X amount. Secondly, when i picked the car up last week, the turbo was spinning slower than I imagined it would and even when revved up to around 2500, I never heard the slightest sound coming from it. Would this be the cause? Turbo is a GT45, Emusa BOV and gate.
What does the vacuum line do? I thought the gate just simply released pressure when it hit X amount. Secondly, when i picked the car up last week, the turbo was spinning slower than I imagined it would and even when revved up to around 2500, I never heard the slightest sound coming from it. Would this be the cause? Turbo is a GT45, Emusa BOV and gate.
Your car will use positive pressure, ie. boost to control the wastegate.
http://www.turbosmartusa.com/technic...astegate-work/
And just exactly how are you determining how fast is is spinning, and what noises exactly are you expecting it to make ?
There doesnt. Only some modern diesels use vacuum to control the wastegate.
Your car will use positive pressure, ie. boost to control the wastegate.
http://www.turbosmartusa.com/technic...astegate-work/
And just exactly how are you determining how fast is is spinning, and what noises exactly are you expecting it to make ?
Your car will use positive pressure, ie. boost to control the wastegate.
http://www.turbosmartusa.com/technic...astegate-work/
And just exactly how are you determining how fast is is spinning, and what noises exactly are you expecting it to make ?
It's still a constant learning process and sometimes even after long reads, your questions still aren't answered. I'll read the link you posted when I get time. Thanks for the replies.
Their is no port of my housing I don't believe. Do people drill and tap or what? Without going and uncovering the car, I can't think of any ports in front of the throttle body.
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Ideally, your waste gate should only ever see positive pressure (boost). You can drill and tap your compressor housing or do the same thing with the intake tube pre-throttle body (most likely would have to have a bung welded on as the tubes are thin). Both of those areas see boost and not vacuum.
I emailed Turbosmart and they told me if I cannot use the compressor housing, to use the intake tube pre-throttle body but it should be pressure only.
There are also silicone couplers that have ports in them and I have also seen an "add a port" but I don't remember who made it.
I emailed Turbosmart and they told me if I cannot use the compressor housing, to use the intake tube pre-throttle body but it should be pressure only.
There are also silicone couplers that have ports in them and I have also seen an "add a port" but I don't remember who made it.
If you cant do compressor housing. Here what i did. i Just drilled a hole and welded in a nipple fitting literally an inch from the vband compressor housing. Same as having it in the housing but didnt touch my turbo.
The wastegate has to have a reference or it wont know what pressure to keep. And i can rev my car to 5000 and it wont spool at all. Thats becuase you are not producing a load to produce exhaust volume to spool the turbo. some one correct me if im wrong about the wastegate and other stuff cause im defiantly still learning also.
Am thinking the same spot you have tapped