Quote:
Originally Posted by johl
This thread has me seriously thinking about using the same efr turbo you did rather than the smaller 6758. Who can argue with full boost at 3500rpm.
I was originally going to utilise twin external wastegates with my twin scroll manifold so I can keep the exhaust pulses entirely seperate. I'm unsure how the borgwarner internal wastegate manages to vent both sides of the exhaust housing? Or maybe I am just over thinking it as I am absolutely sure people much smarter than I have designed this turbo
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You can see that the turbine is fully divided and has a port for each volute in the below photo. This divide is kept all the way to the flapper door, just like running twin external wastegates except it's all kept internal and dumps back into the exhaust stream just after the turbine. It's a very well designed turbine housing.
Quote:
Originally Posted by johl
And the bov just vents the boost back to the intake, not to atmosphere? Is anyone concerned about venting the boost so far from the throttle body?
I read on the borgwarner website that you can also run a normal blow off valve in conjunction with their item
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There is no issue with the BPV being where it is located. It is honestly one of the most effective BPVs I've witnessed first hand. I haven't heard any surge which means it is doing a great job at venting any excess pressure in the pressurized intake tract.
I see no reason to run another BOV unless you want more noise.
Thanks,
Eric