View Single Post
Old 04-11-2022, 01:48 PM   #99 (permalink)
Master EcoModder
aerohead's Avatar
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,566
Thanks: 23,690
Thanked 7,044 Times in 4,518 Posts
added frontal area
Originally Posted by Phase View Post
definitely smoothing out under belly and adding rear wheel skirts. ive seen some people on the ioniq forum say they may not do much because you have to SLIGHTLY curve them outwards for wheel clearance and that that will add frontal area and will just offset the benefits. wouldnt covering the whole wheel well with a skirt offset the few inches of front area added by a lot? especially if id be maintaining attached airflow? personally i feel like the attached airflow is way stronger than adding a inch or two of front area sticking out. obviously ill test it, but what are your thoughts?

extending the sides for the box cavity boat tail will be the harder thing to do, versus just extending the top and bottom spoilers
1) The most important part of the car is it's rear.
2) OEM longitudinal body camber, along the sides may 'hide' any rear skirt 'bulge', placing it in the 'shadow' of the body projection.
3) Even if there was an increase, the 'GOOD' the skirt would do for the tail extension would be orders of magnitude better than any frontal area penalty.
4) You'd want full rear skirts because of the onset flow issue. There are no really low-drag vehicles lacking full skirts.
5) If you had a bridge-fiducial, or perfectly-aligned laser, you could directly investigate any frontal area aggravation.
6) The boat-tail on my CRX was responsible for most of its speed at Bonneville. 'Bulging' rear skirts to get clean air onto the tail was a structural necessity.
7) Af penalty, if any, still netted an overall 26.5% drag reduction.
Attached Thumbnails
Click image for larger version

Name:	member-aerohead-albums-other+vehicles+1-picture156-1990-itworks-crx-undergoes-serialized-high-sp.jpg
Views:	42
Size:	39.4 KB
ID:	31906   Click image for larger version

Name:	member-aerohead-albums-other+vehicles+2-picture275-1984-honda-crx-aero-nose-hatchwing-gap-filler.jpg
Views:	59
Size:	52.4 KB
ID:	31907  
Photobucket album:

Last edited by aerohead; 04-11-2022 at 01:55 PM.. Reason: add 2nd photo
  Reply With Quote