Gotcha and completely understand where you're coming from.

In reality, the street **** or a spoiler is a half-measure. If you're searching for your PBs then you'll want a typical roof-level efficient wing. Also, don't forget about the front of the car! Air-dam is the easy button, but yes I know they're ugly as damnit. The biggest gain to have on NA/NB bumpers is to eliminate that "over-bite" the front bumper has. Getting that taken care of will make the rear aero setup work much better, but also it helps reduce overall lift, yes lift no downforce, on the front of the car.

 

One thing I noticed last year when playing with a GV-style lip is that it made a much larger difference in overall 'settled' feeling of the car when top was down vs up. I know you are asking about the rear, and while I have the 9LR street **** pictured here, I didn't notice a giant difference on the track with it; running with soft top up, NASA HPDE, N/A NA6.

 

@flier129 Any chance you could direct me to a solution for the "over-bite" that isn't an airdam? And why is the over-bite so problematic? Does it encourage the air to cause high pressure underneath the "nose" therefore causing lift?

 

Yes, high pressure builds beneath the nose and lifts it.

 

I have an 02 as well. Front Tupperware kit does wonders for getting rid of front end lift, and I plan on going with something like RTheory front splitter so the front looks mostly "stock". I also have front canards to help with front end lift. For the rear I went with CarbonMiata monster spoiler. I begin to feel it around 90ish MPH. I also have a rear diffuser that's been modified, but it isn't a FULL diffuser as it ends right where my racingbeat muffler is and doesn't attach to the rear diff area like others I have seen.

 

Hello, Have you heard anything back about track car aero? Or did you buy the spoiler? If so, did you notice a difference?

Thank you

 

I've got the trackcaraero wing and it definitely does generate downforce. If I had to guess how much I would say somewhere between insignificant and a little bit.
No data, my butt says so.

Anyway, installed as is I noticed the wing vibrating at speed.
I added rubber stoppers into the rain channel in between the wing mount/trunk and the body of the car to nearly eliminate the vibration at speed.
There is enough downforce that my trunk (with dual trunk lifts) eventually sticks closed.

 

I lol'd.

I've been there. I've installed a part and I think it did something, but it could be in my mind, and I can't say how much it did.

 

Looks like these guys in the UK ripped off the BBFW spoiler. Since BBFW doesn't sell complete kits anymore, it could be a good option. Looks like about $250 after shopping to the US.

https://agrfabrications.com/products/mx5-lexan-spoiler