2008 CRD / Full NADS (Manual boost control - dawes/needle), ECU postal remap, 3" high flow exhaust SS (muffler/cat) Safari snorkel, stock air resonator box and ducting.
I can hear it again!!!!, that sweet song (fox whistle like sound, 2 sec ascending and then 3 seconds descending).
Just when I think I have the boost and spool set just fine, as I back off from a load situation and coast / boost eases off and then I hear this fox whistle like sound maybe coming from the snorkel intake and appears to be possible coming up from the turbo.
Not an unpleasant sound and did occasionally experienced it with the stock ecu (eng running well). Max B 16.5 psi /cruise 15psi
Post ECU remap, today, after some further needle adjustment and again its singing (good run). Remapped ecu in 2 wks now. Max B 21psi /cruise nom 16psi.
Any idea of what the whistle song is about and what may be causing it?
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