High egt cat 2ws

@wore out is the man for you!

 

You say turbo was replaced,. Are you 100% certain you have no exhaust leaks before, or at the turbo flange? Cracked manifold? Guys are bad about not replacing flange nuts/bolts/studs, and getting leaks there.

What is left of the DPF?
What about smoke during acceleration, whistling noise?

 

What exhaust housing is on the new turbo vs. the old turbo?
I ask this because out of the box most 80mm that you get have a 1.58 exhaust housing on them which will be too big for what you say the engine is set at.
Most guys at 550-600hp run a 78mm turbo with a 1.45 exhaust housing. there are some that are fine with running a 80 at that power level but they typically run a 1.32 or 1.45 exhaust housing on it instead of the 1.58.

 

It’s an air problem. M gonna say something dumb but seen it lately are the air filters in it upside down?

 

I know you mentioned checking the CAC and piping. Did you pressure test it? Doesn't CAT use a square cut O Ring on the turbo outlet? Maybe it's missing.

 

I would plug it off at air filters pressurize it on left side and look the entire system for leaks not just the CAC and boots. Be surprised what you’ll find


And start all over like it’s not been looked at. It’s an air problem not a tuning or other issue turbo size exhaust housing etc is fine it’s either not getting enough air or loosing it. Trying 2 different turbos eliminates a bad new one.

For giggles look at the compressor wheel of both just to be sure you’re not getting any missed debris.

I’m also gonna put this out there I’m hearing lots of checked that that’s not it……but you’re missing something I can promise you. High egt is always an air problem be it not enough fresh air, turbo not producing enough air for one reason or another(exhaust leaks or bad exducer wheel banged up compressor etc) or a leak on pressure side period.

 

Can there possibly be shrapnel lodged in intake or a port that is restricting flow? Just wondering if that may be possible. Have seen it in a turbo’d BBC 454 once.