David,

Having read much about the PE1 phase conversion - virtually all positive, I am considering it for my Scoob UK97MY.

However one of the aspects of the conversion, as I understand it, is a reduction in the fuel enrichment strategy used by Subaru.

Do you know DEFINATLEY why Subaru have this (high) level of enrichment?

As I understand it fuel enrichment is used on virtually all modern cars equiped with Catalysts. It`s primary function is to reduce exhaust gas temperature either to protect the exhaust valves or more commonly to protect the catalyst.

Is it the case that Subaru use it for these reasons and possibly to reduce turbine intake temps in the turbo?

If this is the case do you have any objective data that shows catalyst / exhaust valves / turbine reliability is unaffected?

Major manufactures will aim for 150,000 km durability on all main P/T systems.
Obviously PE don`t have the resource to run any kind of long term durability tests, but if you are confident enough to reduce the over-fuelling presumably you have data to support this change?

Thank you....

 

Just keeping it active!!!