to have the a/c idea to work for our hondas we would need to relocate the evaporator somehow in between the air filter and the throttle body. but then that would mean that there would be no more a/c inside the cabin.

i highly doubt that you could hook up 2 evaporators because of the process of the low pressure liquid liquid going into a low pressure gas throught the first one and it would probably freeze up the 2nd evaporator which would cause the system to work intermittantly

another thing is that it would contradict the part of the water injection which is used to cool down the engine because the a/c also removes humidity from the air which is water.

if you relocated the a/c evaporator out of the cabin and put it in the engine bay and used a high amperage electric motor to run the a/c compressor then it might be worth while. but without changeing it to electric then it wouldnt really make up for moving the evaporator.