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| Aerodynamic improvments https://slantsix.org/forum/viewtopic.php?t=30212 |
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| Author: | MichaelS [ Sat Jul 26, 2008 12:29 pm ] |
| Post subject: | Aerodynamic improvments |
Has anyone tried covering up some or all off the grill on a late style Dart? I wonder if it gets enough air from the bottom to cool the radiator. Could this be more aerodynamic and get better mileage? Any thoughts? |
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| Author: | MichaelS [ Sat Jul 26, 2008 1:04 pm ] |
| Post subject: | |
I made a cardboard mockup to fit in my grill and if I cover it up to were it start to make a point ('74 grill) that leaves me with 17" wide opening, seems like it should be enough as the radiator is only 19" wide anyway. Hmm.... |
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| Author: | slantvaliant [ Sat Jul 26, 2008 3:22 pm ] |
| Post subject: | |
Blocking off part of the grill can help, but it can just as easily hurt. If you want to try, make sure you make careful before and after measurements so you can tell whether it makes any difference, or just "feels" better. Check aero drag and fluid temperatures as well as fuel economy so you can tell what's actually changing, if anything. .HERE'S an approach to measuring the aerodynamics of various driving modes for an older Plymouth. Aerodynamic changes will help most at highway speeds. Airflow can be a tricky thing. Some very fast cars do well with relatively small radiator openings, partly because of the high pressure in front of the openings, and partly because of air management in, through, and out of the radiator and engine compartment. The same cars may overheat at normal speeds. The shape of an air opening can hurt the flow. An opening simply cut into flat sheet will not allow as much flow as a somewhat smaller opening with appropriate radii. |
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| Author: | Dart270 [ Sun Jul 27, 2008 8:29 am ] |
| Post subject: | |
Thanks for that link! Looks like a nice measurement scheme on first look. Lou |
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| Author: | sandy in BC [ Sun Jul 27, 2008 12:39 pm ] |
| Post subject: | |
Cool link SV! |
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| Author: | slantvaliant [ Sun Jul 27, 2008 4:27 pm ] |
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A little tinkering with the Excel file would let one test several "modes" on any car. I've been meaning to do that ... I'd like to do the obvious tests - stock ride height, windows up/down, etc, and then look at rake, chin spoiler/splitter, wickerbill, etc. You don't know until you test. |
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