okay i know im a newbie to passionford but....
boot mounted radiators, VERY good idea, freeing up space for a large intercooler up front where the radiator used to be, with adiquate heat shielding (for the turbo) and a nifty oil cooler controlled via thermostat would keep things nice and coool.

anyway, back to the design, i'd like you to look up "ground effects" on cars, and diffusers/splitters

diffusers are the big things on the rear of most DTM cars, *runs around and looks for pics*




the purpose of the diffuser is to control the travel of air from the bottom of the car, up to meet the air that runs over the top of the car.
this creates less drag and reduces natural lift of a car.

now, here we have a situation which includes fast flowing air thats going underneath the car and past the boot floor anyway.

with reference to picture 1, whats that centre section you ask, blocking flow.
well, add a radiator there, no need to have the rad mounted internally in the boot, have it mounted externally under the rear of the car in a large diffuser.
for 1, this reduces drag and lift
for 2, this is a place of fast flowing air

problems being stonechips, so a grill would need to be manufactured to protect the rad.
heat when sat, fans must be added if the car is to be used on the road, in traffic jams etc.
and suspension travel must not "bottom out" on the rad, or this could cause a big ass leak.


either that or mount the rad in the centre of the boot facing vertically to the back of the car.
cut loads of holes in the bootlid centre and find a way to get air into the car, naturally the air will flow out into the vaccum caused behind the bootlids vertical face as it always does, this also reduces drag and aids flow to the rad, win win.
its also safer