Ya know the dealer tells me the excessive cylinder pressure leaks into the coolant system and causes the overflow and puking. The last time I was at the dealer they charged me a hundred dollar deductable and just gave the computer a new flash and fixed a leaking hose (rubber) to the turbo from the ...

"EGT 1560 F" would be my concern. Isn't that a little high?
My temps used to run around 800-950F normal driving and 1000-1100F under medium load such as uphill driving with 100hp tune. I never let it go above 1200F.
Good luck

Update.
NOTE: With the coolant bottle/reservoir filled to 1" below the lower level mark.
Also during this testing period I have not ran it hard enough to allow the turbo boost to exceed 25 psi. I say that because it has tipped over the 20 psi mark a few times but not for long periods of time and ...

:?: I see that some people have had similar experiences with the Predator. I was wondering if the guys at Diablosport can write a tune that mellows out the turbo boost and maybe holds the tranny in a little longer. Add a defueling fix which may be an RPM thing and It may cause my heads to last ...

I have been told by the dealer that when I run my programmer among other things it raises the turbo boost , which in turn leaks exhaust by the heads and enters the cooling system causing the recovery bottle/resovoir to puke coolant all over the inside of the engine compartment. I have actually had ...