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Engine cooling - radiator and shrouding
I'm trying to improve air cooling efficiency on my Z4. Was hitting 210degF coolant on a hot day, and 260 oil temps. I run a large CSF oil cooler mounted beneath the radiator, but also a large front mount intercooler. I also still have the A/C condenser in place.
I used to not have cooling issues last year, somehow it has slowly gotten worse. Coolant is 50/50 mix fresh this season.
I do have a vented hood (using 3 trackspec vents), and majority of undercarriage is covered with undertray panels. I bet I ruined the path of air escape from the engine bay, but not sure.
There is a gaping hole right above the radiator, between the large upper plastic cover. I was contemplating shrouding that area so that no air can escape above the radiator.
But, I noticed the plastic cover has a few vents in it. Does anyone know if this cover has any purpose for air flow? Should that gap between the radiator and this cover exist for some purpose?
Anyone shroud that area off with no detrimental effects?
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