Quote:
Originally Posted by Deftronix
That's too bad - was hoping to do an intake out front similar to yours solely for this reason. Let me know if you find out where the source is coming from. Could be hearing the pcv flow or the actuator that allows air to flow to the high pressure turbo side when you get higher in RPM as well. Any possibility it could be the intake pipe vibrating against something when the engine hits a certain frequency that's causing it to resonate? Good luck figuring it out and keep us in the loop!
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I thought about the PCV but the 335d guys have the same OEM turbo inlet as us and have none of the noise.
335Ds only have 1 egr cooler (mani-intake) X5s have the additional EGR from DP-low pressure turbo and it has an wavy flex section so it's the obvious suspect right now. It has to be it, we will know shortly!
The intake is very sturdy and dampened with rubber or silicone at every contact point.
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N54 Powered M5 Wagon:
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- EOS Port Injection Manifold, Fuel-It: Stg 2 LPFP +Lines +Ethanol Sensor
- JB4, Hexon RR550s, Custom Inlet, AR DPs, 3" Exhaust, VRSF 7" IC, ER CP +Tial