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Christ · 11-20-2009, 11:55 PM

Bottom has minimal airflow, I'd worry more about keeping the top attached. 15* may do it for you, though.

Best to set up a test bed type of mod, that you can tweak and test, rather than going all out on the first iteration, just for this type of question.

I do think that 28* on the bottom is way too steep to even think that airflow will stay attached, so it might be OK to break cleanly, rather than try to keep attached flow. I assume the front will have a lowered stagnation point, so there will be less than normal airflow under the car as well, correct?

11-20-2009, 11:55 PM	#12 (permalink)
Christ Moderate your Moderation. Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts	Bottom has minimal airflow, I'd worry more about keeping the top attached. 15* may do it for you, though. Best to set up a test bed type of mod, that you can tweak and test, rather than going all out on the first iteration, just for this type of question. I do think that 28* on the bottom is way too steep to even think that airflow will stay attached, so it might be OK to break cleanly, rather than try to keep attached flow. I assume the front will have a lowered stagnation point, so there will be less than normal airflow under the car as well, correct? __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"