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Old 02-06-2001, 10:44 PM   #1
WRXwannbe
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Post external wastegate:classy but is it worth it?

external wastegates seeem to last longer and offer better persomance than conventional integral wategates, but how does IHI stand up to this?
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Old 02-07-2001, 01:19 AM   #2
doripreza
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umm, i guess this is a preference thing but i always go by this rule... if you are planning on running over 9lbs get an external wastegate... but almost all IHI's use an internal.. the bigests complaint I've heard is that internals don't respond well to higher boost levels and externals can boost surge, I'm using an external
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Old 02-07-2001, 05:44 AM   #3
scoobiejosh
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The externals are better for high boost aplications. The internals just cant bleed off like a much larger external can. Besides nothing says im gonna rip you a new one like the sound of an external wastegate opening up and venting to the atmosphere.

Josh
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Old 02-07-2001, 08:41 AM   #4
XT6Wagon
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Depends on the internal, and the application its on that deturmines IF a external will be better. The better IHI's have a completely different exaust bore for the wastegate, so in perfromance it is very much like a external. It doesn't have the easy adjustment that most externals have, but you save several hundred dollars and alot of room under the hood with the internal.
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Old 02-07-2001, 09:21 AM   #5
shiv
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Hi guys-- It's not just bore size that makes external wastegates superior to integral ones. It's also because they cause less exhaust gas disruption in and after the turbine housing. This usually accounts for a few extra percent turbine efficiency, which is hard to come by otherwise.

Shiv
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Old 02-07-2001, 11:08 AM   #6
WRXwannbe
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now with the external wastegate, can it be computer controlled with an ecu? or do I have to buy and replace springs?
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Old 02-07-2001, 11:36 AM   #7
scoobiejosh
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you can controll it with a Boost Controller. If you have an aftermarket ECU (Motec, Haltech) that can controll boost, then they can.

Josh
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