What are you looking for in a diffuser?
 

We've created an agressive diffuser with a 6" flat bottom for the NA and NB. It accomodates exhausts that exit the standard position and to the side, both rear tow hooks, and requires no drilling. It's CNC laser cut, powder coated, and easy to install. We also offer free shipping. We're looking to get some input from the Miata community! What do you think?

https://cimg7.ibsrv.net/gimg/www.mia...453fbc5437.jpgNA Miata racing diffuser with 6" flat bottom
https://cimg1.ibsrv.net/gimg/www.mia...a04a809015.jpgNB Miata diffuser V3

For swag points, it looks OK( if for some reason you're into that), and the fact that's PnP is gonna help. For function, I am not convinced at all.

Is this just a " we think it does this or that" or do you have any data regarding its effectiveness, CFD, real world test(tufts), maybe even ride height monitoring? CFD on a non-flat bottom miata would be cool.

I would like something that doesn't work with a stock un-modified rear bumper. Because if it does, then it probably doesn't work and is just pure stanceboi drift stuff for cool looks. Which is fine, but not what i would want.


2000 SEs are cool, though. So you've got that going for you. The overall construction looks much better than the R Theory diffuser i bought (which is also stanceboi drift stuff for cool looks), so that's good, too. Make it functional and i'm interested.

I'd still by the warhose modular before this. I would not want my diffuser mounted to the subframe brace locations. R theory has a nice bracket Idea to eliminate that.

why? its a 12mm dia. bolt. I dont see much problem with using that at all. a bolt on mount would likely add a moment arm.

R Theory diffuser is mounted to the subframe brace locations. Source: I have one on my car.

Because I would mount it in a different fashion rather than to that 12mm bolt. It doesn't need it. I don't like sandwhiching the aluminum panel there when that bolt should be really tight. Those weld nuts break easily if over torqued which could happen due to the aluminum panel. Can't use PPF brace :] I guess if you remove the brace, then it wouldn't have a bump leading into the flat section..

All of these concerns apply to the R Theory diffuser, which imo has much inferior overall construction to what is shown in the OP.

Also: Those weld nuts often break when taking them off for the first time you drop the diff in these cars. I break them on purpose and replace with good quality SS nut/bolts.

If you think that small bump makes any difference after flowing past all that other junk up front, i think you are wrong. not sure of the alloy used but, sandwiching 6061 or 5052 is fine. wont hurt it.

I can't find any pictures showing Rtheory mounting. I only ever saw a small 90* bracket which bolts to an existing 8mm bare hole on the subrame(where the 949 brace bolts to). Then gives a horizontal surface to bolt the diffuser plane to. Sure bolting to the subrame brace is easy and stout. It's not a deal breaker. Did you lok at the other miata diffusers on the website? They don't look like they are going to work well. Especially not have a nice smooth leading surface up to the diffuser.

What pictures would you like? I can go out to the garage and take pictures of how it is currently mounted to my car using the subframe brace bolts that you don't like. I can also assure you that the R Theory diffuser will not work well. It's not big enough, not wide enough, and has an un-functional amount of air gaps between the parts that are weakly riveted together.

That's why there should be a flat belly of some sort. BUt on this diffuser, that initial bump from the brace itself is going to affect the fuction. It only has a very short section of flat after it and then woosh up to the diffuser immediately.

Here's a pic that shows everything that you're complaining about here. :P

https://farm5.staticflickr.com/4451/...f0f17ed3_b.jpg
20171016_171011 by concealer404, on Flickr

No need to.I wasn't aware the R theory mounted to the subframe in the same way. I'm not looking to buy an R theory or was I claiming it was designed better, differently, other then the bracket I mentioned. Both products look pretty similar, another option is great, if it was intended for cut bumpers.

Cool. :)

The R Theory brackets are for the rear-most attachments. They're fiddly, cheesy, and not something i'd call a "plus."

The more i look at the OP, the more i think i could work with that a lot better than what i've got, but it would have to be higher in the back/exit, first.

Discussing, not complaining! For all the hard work and price, I would just expect it to be executed a little better than what is already out there.

Oh!

Boy i feel dumb. I didn't even catch that this was actually currently for sale. I thought this was a gathering interest/how can we improve it kind of thing.

Well technically they are asking for input on what the kitties have to say.