what's wrong with my car?

[PRtsi]

right now the only mods I have in my car are a walbro 255hp and an afpr.
I'm running the stock boost level.

when I'm cruising in the highway at about 65mph with no boost my egt's go up to about 1,500 I checked the timing and it's set to 5 btdc.The car also when in boost feels like it has no power after 4,500rpm.
Someone told me it could be a bad knock sensor but I don't really know what could it be.

Any help would be apreciated

 

[crankbender]

This is normal. Actually you want higher combustion temps when cruising for emissions purposes and fuel economy.

Remember high EGTs and power cause problems...either by themselves is all good.

 

[PRtsi]

but my car started doing that about two weeks ago and you can really feel the lost of power after 4,500 rpm even at boost
could it be the knock sensor?