 Radiator perpendicularity to airflow, how important is it? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| bondo |
 Nov 10 2005, 04:25 PM
Post
#1
|
|
Practicing my perpendicular parking  Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California  |
I'm working on radiator placement, and wondering if it's super important to mount it vertical. I know tilted radiators have bene done in 914s before, but they're usually very large radiators that wouldn't fit if standing straight up. It seems like some angle off perpendicular might improve cooling by introducing turbulence within the radiator? Too much and obviously there'd be a disadvantage. Do any manufactured watercooled cars have a tilted radiator? Seems to me I saw an RX-7 once that did. I know that the intercoooler on our WRX is pointed nearly straight up (with a scoop directing air downwards into it) and way more bugs hit the back half than the front, presumably meaning most of the air does too.
I figure that at worst I'd lose some effectiveness at cruise, because if the car is not moving, there is no airflow to be perpendicular to. Do most 914 V8s that have cooling problems have them at cruise or at idle? |
   |
 
|
  |
Replies
| 914GT |
Nov 10 2005, 09:22 PM
Post
#2
|
|
Senior Member Group: Members Posts: 1,101 Joined: 11-October 04 From: Tucson Member No.: 2,923 Region Association: Southwest Region |
I would pretty much agree with everything that's been said so far. For a basic cross-flow radiator I don't think it matters much how it's oriented. Probably horizontal arrangement would even improve convection cooling assuming the hot air isn't trapped above the radiator and can't flow out. But I doubt if convection is a significant factor as at low speed the fans are doing the work to provide air circulation. So the important things are what have already been mentioned - to create a high-pressure zone on the inlet side, and low-pressure zone on the outlet side, block recirculation, and minimize overall restriction.
As Don said, the angled radiator arrangement with shroud and cutouts in the front bumper (and also some opening toward the front of the trunk bottom) is a proven design. But I do like to keep an open mind to anybody else's ideas to minimize the intrusion into the front trunk. It would be nice to have a radiator setup that would allow a full-size spare tire on top or toward the back of the trunk. I've seen one or two but I'm not sure if they'd work well here in the desert. |
|
|
|
Posts in this topic
bondo Radiator perpendicularity to airflow Nov 10 2005, 04:25 PM
bd1308 from what i have heard some people complain of hea... Nov 10 2005, 04:31 PM lapuwali With appropriate ducting, the angle to the airflow... Nov 10 2005, 04:46 PM Rough_Rider Lotus Elises's & Exige's Both Mk1 & Mk2 va... Nov 10 2005, 04:50 PM bondo ... Nov 10 2005, 04:51 PM Andyrew Most have the problem of cooling while at sustaine... Nov 10 2005, 05:12 PM andys The outlet not only needs to be in a low pressure ... Nov 10 2005, 05:16 PM jsteele22 Sounds like good advice. Think of it more in term... Nov 10 2005, 05:48 PM Aaron Cox look at an H1 hummer. the radiator is basically fl... Nov 10 2005, 06:01 PM Crazyhippy I've seen cars not cool in traffic, but cool f... Nov 10 2005, 07:59 PM bondo Nov 10 2005, 08:38 PM
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 1st August 2025 - 06:22 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.