I believe I've got an answer to a nagging problem of the turbo diesel world. A
simple low cost possibly d.i.y. way to eliminate turbo bark and the associated failures!
What is bark ?
Bark happens when the turbo is suppling boost pressure and the engine doesn't need it; i.e: when you shift or lift suddenly off the throttle. The resulting back pressure can't get out, so it slows/stops the turbo compressor, putting strain on the bearings and in some cases shearing the shaft !!
Gas engines use a BOV or blow off valve to cure this. It simply opens/vents boost from the vacuum created behind a closed throttle plate. Unfortunately diesels aren't quite that simple so untill now we've had to deal with it or shell out the $$$. If bark isn't a problem for you maybe you'd just like the swoosh sound it makes
or the increased spool between gears.
Anyway if I get a decent response here for it, I'll post a schematic and some pics . Maybe a kit for those not inclined to D.I.Y.
Hope to hear from y'all ! Carl.