Proper Splitter Angle for Flat Splitter Blades

Instagram: @ajhartmanaero

[amtmotorsport]

I'm both honored and embarrassed to have inspired this video.

[TheNewNoise]

I was just about to add one of those “trim” pieces... glad I saw this video first!

[RichardMoussa]

As my dad would say, you are a very smack man. Now what he really meant to say is you’re a very smart man. Keep up the good work. Your insight is priceless

[kevin_huynh]

Wow thanks for this! Super helpful in explaining the thinking and theory behind mounting. Just got finished up building my own splitter out of plywood, wish I would have had this before hand :)

[EmptyPocketRacers]

Thanks for the video response to my question.! It would also be interesting to talk about the optimal distance between the splitter and the ground.

[Captaindan]

109 likes and zero dislikes. I love the DIY racing community! Thanks for the tips - time for aero soon.

[hangtimeracing]

Appreciate the info. With most modern cars, curb approach is factored in. The 5th gen Camaro has 6* of upward angle at the center front. I tried to build something to make that 0* . It took a 1.5" spacer in the center that tapered downward as you went outward. Tough to keep it all intact after a few track days. Still trying to figure it all out and retain the factory front bumper

[JamesWoodFCRX]

Lots of great info in this! I’m going to try to radius the edge of my next splitter on my RX7! Please keep up the whiteboard aero videos!

[davidisakson]

Good stuff. Gonna go make some adjustments. Thanks!

[feralmr]

Haven't seen reference to the radius on the underside of the leading edge before.
I'll have to do that to mine seeing it has a flat edge.

Good clip.

[EvanLéNoir]

Do you have a tut' on how to find the proper level of your car in order to pitch the splitter correctly/ideally?

[V_Obsidian]

excellent video sir, thank you so much for your help and knowledge

[kenselleck]

You can angle the splitter up to 7 degrees downhill. More than 8 degrees will cause separation on the bottom which makes turbulance.

[sundippatel]

AJ, great explanation. I just wanted clarification one of your last points. If I am installing a splitter, you saying adding a 2.5 inch all lip universal kit, even thought it’s adding rake, you would not recommend that?

[Biffsteki]

I understand that this video is referring to splitters without flat floor, and also that its aero at and entry stage for people mounting at home. But its worth to mention that if your feeding a raked, sculpted or a floor with an effective diffusor, mounting the splitter upward is often a great way to get more cleaner air and increasing air velocity and downforce. I do this on my TA customer cars after CFD simulations. Widely used in TA motorsports and other unregulated classes. You do move the center of pressure backward since you are creating a little bit of lift at the very front but gain overall DF. How ever if you manage to accelerate the air enough under the floor, the speed will also increase enough under the compression zone so that you still gain net DF under the splitter.

[TenzaMotorsports]

Is that front edge the only reason you don't recommend alumilite? I run alumilite and having a curved front edge is something I can make happen. It happened naturally when I ground it off my other racecar coming out of a few bad parking lots. I Just made a new splitter, I used alumilite because I have been getting it used for free.

[zillerw]

why not alumalite or dibond? I use it and generally like it, curious your thoughts.

[Kakeyoro]

I would also imagine, the thinner the better (of course maintaining proper structural rigidity/strength). I purchased a half-inch birch composite splitter. The front leading edge is slightly rounded out top and bottom.

[RichardMoussa]

So how much rake do you recommend. 1, 2, 3 degrees?

[mc]

Im thinking, if some times the perfect rear diffuser (going up from the lower part of the floor to before the end) and rear windshield (going down after the hood until the end of the rear) ideal angle is refered as 12 degrees, will the splitter be the most effective at that angle? Im assuming that such angle would be way to high as something like 3 to 5 degrees are most seen.
Great content as allways, loving all the videos. Probably my favorite aerodynamic subject channel by now, as Kyle have been a little off.