fr33b1rth
20+ Year Contributor
- 280
- 3
- Jan 20, 2003
-
Kalamazoo,
Michigan
Correct me if'm i'm wrong, but boost creep is caused by the wastegate not being able to flow enough air to bypass the exhaust turbine. The reason why people use external dumps is because it enables the excess exhaust gas to be extremely efficiently re-routed via the wastegate.
A stock O2 housing simply dumps the wasegate gasses into the exhaust causing violent turbulance in the O2 housing because it is interfearing with the exhaust gasses coming from the turbine. This reduces the ability of the exhaust gasses to flow out of both the turbo and the wastegate.
From what i understand, lots of people either can't use an external dump because of state laws, or simply don't like being extra loud.
I have yet to see someone take an external dump, and route the wastegate dump via another mild steel tube further down the exhaust, say right before the cataletic converter and merging it with their existing exhaust at an angle that is almost paralell to the exhaust. This would still allow for very efficient exhaust gas flow for both the turbine, and the wastegate, thus reducing boost creep almost just as much as just the external dump.
The most efficient exhaust is one that has these features:
1. Low restriction
2. No sharp bends, thus smooth flow
3. Some kind of heat shielding, such as exhaust wrap, or similar coatings.
4. Nothing that creating turbulance in the exhaust.
Has anyone tried this, or are they going to?
A stock O2 housing simply dumps the wasegate gasses into the exhaust causing violent turbulance in the O2 housing because it is interfearing with the exhaust gasses coming from the turbine. This reduces the ability of the exhaust gasses to flow out of both the turbo and the wastegate.
From what i understand, lots of people either can't use an external dump because of state laws, or simply don't like being extra loud.
I have yet to see someone take an external dump, and route the wastegate dump via another mild steel tube further down the exhaust, say right before the cataletic converter and merging it with their existing exhaust at an angle that is almost paralell to the exhaust. This would still allow for very efficient exhaust gas flow for both the turbine, and the wastegate, thus reducing boost creep almost just as much as just the external dump.
The most efficient exhaust is one that has these features:
1. Low restriction
2. No sharp bends, thus smooth flow
3. Some kind of heat shielding, such as exhaust wrap, or similar coatings.
4. Nothing that creating turbulance in the exhaust.
Has anyone tried this, or are they going to?
