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external wastegate (idi-vnt related) by Benjamin on 21 Oct, 2006 17:13
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in folowing of the VNT topic.
you need a external wastegate to control the boost on a IDI. (correct me if i'm wrong)
i was searching http://www.motors.ebay.com/ a bit.
i found very cheap external wastegates
http://cgi.ebay.com/ebaymotors/35mm-DSM-JDM-TURBO-EXTERNAL-Wastegate-Kit-8Psi_W0QQitemZ290040052189QQihZ019QQcategoryZ33742QQrdZ1QQcmdZViewItem
http://cgi.ebay.com/ebaymotors/35MM-EXTERNAL-WASTEGATE-8PSI-JDM-2bolt-Turbo-GREDDY_W0QQitemZ260041629881QQihZ016QQcategoryZ33742QQrdZ1QQcmdZViewItem
they are stock 8psi, low boost. with a stronger spring it can give you the right boost, but can this low budget wastegate also take this high pressures up to 30psi??? i thought maybe they should brake?
any expierience?
what do you think of this one?
http://cgi.ebay.com/ebaymotors/SKYLINE-VL-TURBO-T3-EXTERNAL-WASTEGATE-ADAPTER-RB25_W0QQitemZ150046742497QQihZ005QQcategoryZ33742QQrdZ1QQcmdZViewItem
this is my own project for it (unfinished)
Greetz, Benjamin -
#1 by rabbid79 on 21 Oct, 2006 17:25
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I'm not certain you need a wastegate to control the boost on a VNT turbo. I think a lot of it probably has to do with how the VNT mechanism is adjusted, and other variables. I put a VNT-17 on my 1.5, and unlike the VNT topic you're referring to, my turbo only builds about 5 pounds of boost when the vanes are completely open. That tells me that there's a lot of head-room built into it for controlling the amount of boost.
That's just been my experience though. Perhaps with a VNT-15 on a 1.6 it completely different. -
#2 by Audi80 on 21 Oct, 2006 17:50
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No, you won´t need a wastegate. Just correct adjustments to vane mechanism. I´m using a VNT20 vacuum can with flipped internals (boost controlled) It works pretty good to me.
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#3 by Benjamin on 22 Oct, 2006 03:59
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@Audi80: how much boost are you running, how high are your peaks?
if the boost peaks to high you producing hot air, isnt?
its maybe a stupid question, can you make more power with an external wastegate?
Greetz, Benjamin -
#4 by Audi80 on 23 Oct, 2006 05:10
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I´m running 1,6-1,7bar (23-25psi) boost, no peaks higher.
If you limit the boost with vane control, where do you need a wastegate?