Originally Posted by KungFuKorean

first of all, however experimental and ingenious you may think your turbo to turbo setup is, it isn't reasonable... twin turbos don't work that way... twin turbos are used on six cylinder engines (one turbo for each of the 3 cylinders)... a single t3 is capable of putting out 30 psi, enough to grenade your engine as it is...

Is you current snail water and oil cooled? check and make sure that your oil return line going to your oilpan is plumbed so it flows downhill, this can cause overheating problems if its not...

also what type of engine management are you using, if any? if you are running an FMU with check valves, this can be your problem as it can run your car too rich/lean...

I would suggest:
-turning down your boost
-making sure your intercooler, oil, and or water is staying cool
-getting engine management (crome is free!!!)

by tuning your engine to lambda (perfect air to fuel ratio throughout your power curve) with an engine managment system your engine will run cooler and make more power...

if you are running stock engine internals, i wouldn't suggest running more than 7-8 psi...

tune and or build your engine to accept more psi not more turbos... adding another turbo will just make your engine a bomb...