AZRR CYM FD Build Coming Together

cozmo kraemer · 03-16-2009, 01:08 PM

I think you restrict flow through your radiator a little bit by fully boxing the back side like that. I can't see the 'true' rear opening of the radiator from the pics, but from my recollection, your fans have to be pretty dang close to that panel.

I would at least louver it (if possible) so that your fans have more area in which to push air out of the radiator.

I know a lot of people overlook the rear side of the radiator when addressing cooling concerns. In a stock FD the rear side of the radiator is almost completely blocked by the battery, intercooler/ducting and intake. This is the primary reason for its failure to cool the car properly. Why open up the whole back side of the radiator (with a vmount) and then close it off (even partially) again?

Never the less. Glad things are coming along. Let me know when this thing is rolling.

RCCAZ 1 · 03-16-2009, 02:40 PM

Thanks for the observation Cozmo. IMO, the side panels just ensure that air keeps moving towards the rear of the shroud. I can always take them off if I find the setup to be restrictive. With this car, I've found that blocking off as many air gaps as possible to get more "direct" flow pays huge dividends. The only time it may be detrimental is in stop and go traffic when the lack of ram airflow limits the design's ability to move air. But even then, one flick of the fan switch and voila.... instant airflow. I know that you and I talked about the possible detrimental effects of "reverse flow" if the system were too restricted. That's why I kind of like your louver idea.

We'll see.....

Thanks again for your suggested improvements.

03-16-2009, 01:08 PM	#1
cozmo kraemer The Newbie Join Date: Jan 2009 Posts: 16 Rep Power: 0	I think you restrict flow through your radiator a little bit by fully boxing the back side like that. I can't see the 'true' rear opening of the radiator from the pics, but from my recollection, your fans have to be pretty dang close to that panel. I would at least louver it (if possible) so that your fans have more area in which to push air out of the radiator. I know a lot of people overlook the rear side of the radiator when addressing cooling concerns. In a stock FD the rear side of the radiator is almost completely blocked by the battery, intercooler/ducting and intake. This is the primary reason for its failure to cool the car properly. Why open up the whole back side of the radiator (with a vmount) and then close it off (even partially) again? Never the less. Glad things are coming along. Let me know when this thing is rolling.

03-16-2009, 02:40 PM	#2
RCCAZ 1 Rotary Fanatic Join Date: Mar 2008 Location: Phoenix, AZ Posts: 288 Rep Power: 18	Thanks for the observation Cozmo. IMO, the side panels just ensure that air keeps moving towards the rear of the shroud. I can always take them off if I find the setup to be restrictive. With this car, I've found that blocking off as many air gaps as possible to get more "direct" flow pays huge dividends. The only time it may be detrimental is in stop and go traffic when the lack of ram airflow limits the design's ability to move air. But even then, one flick of the fan switch and voila.... instant airflow. I know that you and I talked about the possible detrimental effects of "reverse flow" if the system were too restricted. That's why I kind of like your louver idea. We'll see..... Thanks again for your suggested improvements.