Internal Wastegate for secondary in twins?

secondarychaos · Apr 2, 2009

The thought crossed my mind- Would an Internal Wastegate flow enough to function well in a set of twins?
It seems like most guys that run WG's in twins run a huge one and tune it very specifically. I'd like to just plug a Vac/boost line into mine and have a functioning system.
So, has anyone done this?

mattr66 · Apr 2, 2009

I would think your total airflow would be too limited through your housing and internal wastegate not to mention that your second stage needs more bypass than that since you are cramming a ####load of exhaust flow through the system.

UNLIMITED_DIESEL · Apr 2, 2009

secondarychaos · Apr 2, 2009

ok, those are external, but did you post that because they are sized and not tuned?

UNLIMITED_DIESEL · Apr 2, 2009

IMHO internal gates are useless in a twin application. You need to remove the exhaust before it gets in the turbine housing. AND it needs to be taken off of both sides of the engine evenly... Not just the passenger side

secondarychaos · Apr 3, 2009

Ok, that's the answer I was looking for, Thanks.
Are the gates in the pic above working only on pressure? or are they tuned in some fashion?

tjbeggs · Apr 3, 2009

Internals won't be enough. Most of them are only about 3/4 to 1 inch opening. At least the ones I have seen.

PowerstrokeJunkie · Apr 3, 2009

Yep, and like nate mentioned, it only dumps exhaust pressure off of the passenger side cylinder bank, because the housing is divided

Internal Wastegate for secondary in twins?

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