WEP dead zones

[MIDWAY]

I've noticed that WEP is not usable between 1000-9000Ft. When trying to engage it at an altitude between 1-9k.   I can't find a combination of blower settings or throttle settings which don't cause knock that can engage the wep, as shown on the water pressure gauge. 

If you start with WEP on above those Altitudes, you can keep it on during a decent all the way to the deck.  Once you start climbing again it will shut off and not come back on till 9000.ft.  I found this repeatable.  

 

See track.  

LastMissionTrack.trk

[MIDWAY]

Further testing:  I found that engaging the blower at 1k will allow you to stay at WEP from 1k up past 9k, where it works normally again.  However, once it turns off you will get knocking if you try to re-engage.  

 

Edited 4 hours ago by MIDWAY

[Saxman]

I've had similar results.

Also, sometimes WEP simply won't turn on at all.

it's also overboosting the engine at altitudes where it SHOULDN'T.

Here's the specs from the POH. It's quite clearly shown that you should be able to get WEP at 2700RPM all the way up to 25,000ft. So we should not be getting over-boost at full RPMs as it is currently.