Self Vented Hood with GT500 Hood Vent
#27
Interesting project. I thought about doing something similar but lost motivation/courage/time.
One thing you could do is buy a few USB barometers as this link describes:
Air Flow and Pressure Around Car
You could then plot out whether you actually have a low pressure area above your hood vent vis-a-vis your underhood pressure. (I imagine you'd want high pressure right in front of your radiator and low pressure above your vent to aid heat extraction).
As I understand it, the front half of the hood typically has the lowest pressure (see http://flyinmiata.com/tech/images/NC-hood-pressures.gif), but from your experience it seems like there's a point where the vent will be in front of the hood and a pressure differential will actually cause air to bypass the radiator. Hard to tell from the pics, but do you think this ebay hood has the vent too far forward? https://www.ebay.com/i/300752073566?chn=ps
Keep up the good work!
One thing you could do is buy a few USB barometers as this link describes:
Air Flow and Pressure Around Car
You could then plot out whether you actually have a low pressure area above your hood vent vis-a-vis your underhood pressure. (I imagine you'd want high pressure right in front of your radiator and low pressure above your vent to aid heat extraction).
As I understand it, the front half of the hood typically has the lowest pressure (see http://flyinmiata.com/tech/images/NC-hood-pressures.gif), but from your experience it seems like there's a point where the vent will be in front of the hood and a pressure differential will actually cause air to bypass the radiator. Hard to tell from the pics, but do you think this ebay hood has the vent too far forward? https://www.ebay.com/i/300752073566?chn=ps
Keep up the good work!
#28
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a whole thread dedicated to vented hoods if people want more ideas: https://www.rx8club.com/rx-8-discuss...amples-263569/
only posting it here since that thread is newer than this one.
only posting it here since that thread is newer than this one.
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