is there any way you can not use that overhang bumper?
On the miata's with an air dam, we ditched the overhang. we were able to increase down force 300% with almost no drag increase.
is there any way you can not use that overhang bumper?
On the miata's with an air dam, we ditched the overhang. we were able to increase down force 300% with almost no drag increase.
In reply to Johnny_at_NineLives :
How do you get rid of the over hang on a Miata? Pictures?
DeadSkunk (Warren) said:In reply to Johnny_at_NineLives :
How do you get rid of the over hang on a Miata? Pictures?
Finally CFD done on My miata.| Aerodynamics forum | (grassrootsmotorsports.com)
Johnny_at_NineLives said:is there any way you can not use that overhang bumper?
On the miata's with an air dam, we ditched the overhang. we were able to increase down force 300% with almost no drag increase.
The issue is I would have to come up with something for cooling (car is a bottom feeder). That said, it is possible.
Johnny/Stafford can correct me if I'm wrong... but I think the main benefit to what the "get rid of the overhang suggestion", is that the vertical-ish face of airdam moves forward and centralizes the positive pressure forces on the upper side of the splitter/airdam to the furthest moment arm from the CG. Which means, that you can trim-in more rear downforce to balance.
I expect that Johnny's car... being an "unlimited" time attack build... has a bit more rules latitude than you do. Although, (and acknowledging my lack of familiarity with c-mod's rules) there might be some room to add a vertical airdam forward, that provides some of the benefits, and gives rise to ducting in to the radiator with a more efficient 1/3-of-radiator area opening that expands to the face. Preferably, that'd probably include canting the radiator at an angle, so the exit flow from the radiator can be forced more-cleanly out "rules legal sized hood ramps/louvers".... although you can do the same with a vertical radiator, it's just more "difficult" (from the air's perspective).
Still waiting on photos from Nationals, but I saw this one and, at least to me, it seems to show things are working.
The air dam, specifically, normally butts up against the body with at least 3/4" overlap. I'm seeing some daylight.
I'm also seeing zero slack in the cables, and I know there was a little.
Nothing much more to add. I just thought it was neat.
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