It's really wonder how some knowlegde gone forgotten with time...
Been there 7-6 years ago, posted here how I did reduce oil, coolant and underbonnet temps, and now... here we go again...
It doable if yopu stick to few principles:
- oil cooler with thermostat sandwich plate (Mocal, at 82C), on top switchable fan +12v from cabin operated switch (in case hard track use)
- thicker coolant radiator, options are either 40mm, 45mmor 50mm from Evo, mounting points to relocate, lower temp thermostat (HKS one 62C or similar)
- Evo style vented bonnet, vent is directly above front manifold and helps to lower temps there
- heat insulation wrap on turbo manifolds, elbows and downpipe, helps a lot with rear turbo section, turbo heat blankets are also helpful.
- heat insulation wrap on intercoler pipes
What you need, is to reduce temp of turbo area and top engine (coilpacks are sensitive for overheating), evo style vent is all you need to be honest. And for fluids just as above.
You don't need to rise a bonnet, it actually disrupts air flow as been proven in Evo (search MLR).
Extra ducts also have very little effect, quite compact engine bay area.