Downpipe with external WG on stock turbo
Jul 1, 2009, 06:35 PM
#17
It'll only creep if it can't flow enough, but I'm guessing it's fine. It has a pretty nice merge with the main flow.
Jul 14, 2009, 09:03 PM
#25
No I highly doubt it because the stock DP isn't divided. There is still two different channels before the turbines and that's all that matters is where they get their propulsion from, not where the leftover exhaust gas goes after it's propelled each turbine wheel. Besides, the stock turbo doesn't have divided outlets on the hotside, so it doesn't matter what's after that.
Jul 14, 2009, 09:34 PM
#26
Let me make sure we are referring to the same thing. I am referring to the division between the BPV channels beneath the flapper. The BPV channels exit prior to reaching the volutes. If the flapper is open (or removed) and replaced with a Tial above the BPV chamber, gases will comingle before they hit the turbo.
To take it even further, since the two volutes are of different geometry, they are going to have potentially different pressures and gas velocities. Since gas follows the the path of least resistance, if the flapper is gone and the exhaust is comingling in the common chamber, it goes to reason that the pressure wave signal is going to be muddied, mitigating the pressure wave effects that benefit a twin scroll.
It's all theory, so I guess the only way to know for sure is side by side comparison.
To take it even further, since the two volutes are of different geometry, they are going to have potentially different pressures and gas velocities. Since gas follows the the path of least resistance, if the flapper is gone and the exhaust is comingling in the common chamber, it goes to reason that the pressure wave signal is going to be muddied, mitigating the pressure wave effects that benefit a twin scroll.
It's all theory, so I guess the only way to know for sure is side by side comparison.
Jul 29, 2009, 11:09 PM
#29
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Jul 30, 2009, 08:01 AM
#30
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Quote:
"Let me make sure we are referring to the same thing. I am referring to the division between the BPV channels beneath the flapper. The BPV channels exit prior to reaching the volutes. If the flapper is open (or removed) and replaced with a Tial above the BPV chamber, gases will comingle before they hit the turbo. To take it even further, since the two volutes are of different geometry, they are going to have potentially different pressures and gas velocities. Since gas follows the the path of least resistance, if the flapper is gone and the exhaust is comingling in the common chamber, it goes to reason that the pressure wave signal is going to be muddied, mitigating the pressure wave effects that benefit a twin scroll. It's all theory, so I guess the only way to know for sure is side by side comparison. "
This is making me have second thoughts about buying this DP, does anyone else have an opinion on this?
"Let me make sure we are referring to the same thing. I am referring to the division between the BPV channels beneath the flapper. The BPV channels exit prior to reaching the volutes. If the flapper is open (or removed) and replaced with a Tial above the BPV chamber, gases will comingle before they hit the turbo. To take it even further, since the two volutes are of different geometry, they are going to have potentially different pressures and gas velocities. Since gas follows the the path of least resistance, if the flapper is gone and the exhaust is comingling in the common chamber, it goes to reason that the pressure wave signal is going to be muddied, mitigating the pressure wave effects that benefit a twin scroll. It's all theory, so I guess the only way to know for sure is side by side comparison. "
This is making me have second thoughts about buying this DP, does anyone else have an opinion on this?