noise at WOT

06f250powerstroke · Nov 29, 2012

i set my mini maxx to hot and at WOT shifting from 4th to 5th it lets a blow off valve sounds off.

Has anyone else noticed this?

WHY NOT · Nov 29, 2012

Mine will do this as well. I was told it is air going out the intake relieving pressure on the turbo during the shift. Don't know how correct that is though

06f250powerstroke · Nov 29, 2012

waste gate opening maybe?

duddy · Nov 29, 2012

It does it on my 08 also. There is no wastegate on the 6.0 or 6.4. It is just air reversing past the compressor wheel of the turbo.

bad12jr · Nov 30, 2012

Turbo bark it sounds like. ^^^ what they said is air has no where to go so that is the path of least resistance but it also stalls the compressor out.

Sent from my x2 somewhere

06f250powerstroke · Nov 30, 2012

this hurting anything, i know these turbos can be on the weak side

duddy · Dec 2, 2012

I do not believe so, it is not like the compressor is sealed holding air in the CAC system. If it would I believe the 6.4 groups would be seeing shaft failures already. Maybe in the long term it could be a problem but I am not that well versed in turbos.