most of the radiators i looked at in the catalogue of my local carpartsmerchant; were about 120-160mm(width) 200-260(length) 33-60(height). that size was varying from carmodel to carmodel. so from the blueprints in the catalogue, it was very cool to be able to have the choice of handpicking a radiator from 100's of different models. the intake and exhaust pipes can be shortened to wish. also tested it by blowing in it, gives very limited resistance (+/- half the internal resistance of the famous swiftech hayden radiator).
the very weird part is that the (internal) hayden operating alone cools my chip better than the external carheater alone. them both together rock, bringing down load temps from 38°C (hayden radiator 2 fans 120mm 12V) to 32°C((hayden + 120mm 12V)+(carheater + 120mm12V)); using only the impressive-looking carheater brought my temps to 50°C after extended time, and that radiator was outside the case
. what i have learned the radiator in the first two pics doesn't benifit alot from a big airflow running past it, here a 120 at 5V will do nicely, anything above is overkill for the limited result. i then noticed that the hayden that previously held two 120's, is as good off with 1 120mm with a fanshroud, whereas the hayden is very responsive to more air blowing thrue it.
so i'm very pleased with the experiment; the eheim 1048 held up nicely after the glueing trick. the extra radiator makes my temps alot stabler (switching off the fans completely makes the temp under load creap up very slowly, about 10 mins to reach 40°C). al0000t more quiet than one radiator. and 10° above ambient full load temps rox.