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external vs internal wastegates?

General Tech Talk

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Posts: 15
Joined: Mon May 03, 2010 3:57 pm
Location: morayfield, Qld

external vs internal wastegates?

Post by cmy60 »

Has anyone fitted an external wastegate to a diesel? And is there much stuffing around doing so?
I mean, a turbo is great and all, but i'd rather be blown...
Posts: 372
Joined: Tue Jul 05, 2005 6:06 pm
Location: Bribie Island

Re: external vs internal wastegates?

Post by sidewayz »

It would be no more stuffing around then fitting one to a petrol.

Unless you had a fairly decent aftermarket turbo or realy bad boost controll problems with your current setup then the extra cost/parts wouldnt really be worthwhile.
Posts: 15
Joined: Mon May 03, 2010 3:57 pm
Location: morayfield, Qld

Re: external vs internal wastegates?

Post by cmy60 »

True. Currently it has an aftermarket turbo and no wastegate at all... The boost is insane and all, it goes great but I want my motor to last... I can't control it yet as it doesn't have a wastegate, unless I go easy on the pedal which defeats the purpose of putting a turbo on the old girl...
Just getting ppls point of view before I go doin anything...
But cheers mate, ill give external a go
I mean, a turbo is great and all, but i'd rather be blown...
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Joined: Sat Jan 20, 2007 8:16 am
Location: New Zealand

Re: external vs internal wastegates?

Post by KiwiBacon »

It takes exhaust heat to drive a turbo, if you are getting enough boost to think there is a problem, then it is likely an overfuelling problem showing as high boost.

What is your engine, what is the turbo and how much boost are you running? Do you have an EGT gauge, if so where is the probe located and how hot does it get under sustained load?
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Re: external vs internal wastegates?

Post by SCANAS »

You could also fit a Dawse Valve in the system to regulate boost?
I'm not quitting drinking, I'm retiring at the top of my game - sporting comeback likely.
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Joined: Sat Jan 20, 2007 8:16 am
Location: New Zealand

Re: external vs internal wastegates?

Post by KiwiBacon »

SCANAS wrote:You could also fit a Dawse Valve in the system to regulate boost?
Nope.
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Location: New Zealand

Re: external vs internal wastegates?

Post by garth »

KiwiBacon wrote:
SCANAS wrote:You could also fit a Dawse Valve in the system to regulate boost?
Nope.
it'll only increase boost.........i fitted a external waste gate as it suited my application and dumped unwanted charge air quickly, it also gives you the ability to play around with the gates opening pressure easily by simply changing the internal springs.
Cons are you need to mod the headers and the exhaust to suit.
Image


good luck
GQ with 30 PSI of TD42T.........
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