Built a splitter with the help of a friend. Current height is 3 1/8" to the ground with approx 0 rake. Tire spats are 1/8" ABS mounted the the bumper and located on the splitter using some U-channel aluminum, An ebay GV lip is attached to the splitter with some self tappers, and the splitter is mounted with quick release brackets, so the entire assembly can come off in about 30 seconds if needed.

I don't care that air dams are objectively better, they are ugly as hell.

 

Good stuff dude. I really like the look of a big splitter with a GV lip. What size did you go with? Looks to be around a 5” extension?

 

We just traced the splitter off my friend’s NB champcar, which s a 6” extension from the front of the bumper. Due to the NA underbite, it ends up around 8” forwards from the lip.

 

More front aero work

First, I built a dedicated duct for my intercooler. The radiator was already ducted, but with the IC just sitting in front of it, I suspected a lot of air was choosing to go through just the radiator instead of the radiator-IC stack. It's 4" long and slightly divergent, hopefully enough to keep a nice pressure gradient across the intercooler core. I debated doing some A-B testing with a manometer or between track sessions, but I convinced myself that it's a good enough design that I just sent it.


Next I blocked off the sides of the mouth that don't feed into the heat exchanges using some ABS plastic. These might come out later if I decide to use that air for other cooling purposes, but for now it's easy drag reduction


don't mind the zip tie splitter rods, I haven't decided what actual hardware I'll go with, so these are temporary(tm)

 

Got damn that's a big splitter! Looking good with the ducting. Nice build.

 

Based on Simba’s feedback, I installed a pair of 2.5” risers on the wing. My only concern was improving rear visibility, which is much better now

 

https://www.professionalawesome.com/...-support-rods/

Buy once, cry once.

 

How did you attach the metal ducting to the intercooler, or is it just resting against it and attached elsewhere?

Curious because I've thought about trying to attach ducting straight to my radiator in the future, but haven't been able to figure out a good way to do it.

 

My entire duct as attached using the lower two bolts that the AC condenser was mounted on. It doesn't seem like much, but it's very secure with how right fitting it is. The IC specific duct I added recently is just riveted to the main duct at the bottom. I might add a little tape between it and the IC, just to quiet some rattles it makes.

I always keep serviceability in mind, so everything can come apart as easily as possible when needed. So the radiator can still come out without having to remove or disconnect the ducting

 

I made a scary discovery:

Splitter reduces under car airflow
airflow is good for cooling hot exhaust
hot exhaust can light your carpet on fire

Car is fine, but things very nearly went badly.

 

Even stock there is metal shielding between the exhaust and the underside of the car and the exhaust and transmission. It would be silly to not have similar shielding or better shielding at higher than stock power levels.

If you make twice stock power, you make twice the stock exhaust heat. Three times stock power is three times the heat. Shield everything appropriately. Do not forget the fuel tank and the rear diff when you are shielding.

When I first went to 3-in exhaust I did not have shielding between the exhaust and the fuel tank and could actually hear the fuel boiling in the tank. Somewhat exciting.

 

Yep, that is on my immediate to-do list. Any pictures of what you did for shielding?

 

Lol, mine wasn't pretty. At various times I used junkyard shielding from other cars and trucks, scrap aluminum and steel, old license tags, and radiator hose clamps to hold it down. I would daisy-chain radiator hose clamps to make them long enough to go around, lol. It worked very well but was as ugly as homemade sin.

There are store bought solutions from Summit Racing if you want pretty. RyanG on here bought one once, I believe.

I also degreased the underside of the floor and used peel and stick Frost King brand aluminum backed foam from Lowe's or Home Depot to keep it out of the floor. Others have done this with success as well. The rolls are cheap and it can be cut with a boxcutter razor. But this is secondary to covering the pipe.

 

waiting for some parts to show up before I can take my car back out, but hey at least it looks good

 

Car looks killer! Putting that silly orange Civic thingy behind you to shame.

Glad the car didn't catch on fire as well.

 

It's been a while since I've worked on or even looked at my car. Anyways, I finally took the oil cooler that was sitting on my shelf for the last 2 years and put it on my car. I initially planned on locating it in the passenger wheel well, but between splitter mounts and general risk of damage, I instead put it behind the radiator on the passenger side. I'm a strong believer that heat exchangers should be ordered from coldest to hottest, so I think this location should be fine. I installed a combo temp/pressure sensor on the sandwich plate so will be able to monitor oil metrics in the future. I trimmed the factory intake manifold brace rather than removing it for clearance (Mazda put it there for some reason). Hoses are -10 PTFE lines

 

Looks great! What brand of cooler, and what size is that? I'm about to do the same thing.

Also, your splitter, is it plywood? What thickness?

 

Cooler, lines, and fittings are all from anfittingsdirect.com. The cooler is "Type 109" which is 11.5x7.5" total size. The sandwich plate is from Circuit Sports

Yes, plywood splitter - I think it's 1/2" birch. Bottom of the leading edge is rounded, it's painted with porch paint from the hardware store. The support zip-ties have been replaced with steel cables on a turnbuckle