[yuzu]

Originally Posted by Rate-of-Twist

Is crap like this really necessary?

Yes lol it’s just a stupid Internet forum, relax

[yuzu]

Originally Posted by Carefree

Spoken from a lightweight who has no understanding of the basic laws of physics (motion, force, optics, etc) from his boyfriends’ house.

Carbon stuff definitely improves the optics I’ll give you that 😉

[Rate-of-Twist]

Originally Posted by yuzu

Yes lol it’s just a stupid Internet forum, relax

Completely calm here, just thought dumb ass crap like this was for the Honda Civic forums.

[Carefree]

Originally Posted by yuzu

Carbon stuff definitely improves the optics I’ll give you that 😉

Pick and choose what you don’t understand.

[clydefrog]

Man, some of y'all are proper curmudgeons. Internet forums have been cesspits since time immemorial and I hope it never changes

I think the F87 forum has a good thread discussing this exact same topic. and I will pick and choose this response there to summarize my feelings on it:

I have been following this and other forums and have concluded,as has the OP, that most of these bolt ones are just cosmetic. While many shops , like Sneed for Speed have lab tested aero for E36/46/92, no one has really stepped up for our cars with good wind tunnel data. Good aero is well worth the price, bad aero can wreck you....so I am still on the fence. By the end of the year I will probably test the 9LR aero, unless something better comes along.

If you're not tracking the car you're not going to feel the impact of these 'performance' parts anyways.

If you are tracking the car, you should probably go for something more professional and adjustable for the situation you're in and the other modification you will be making.

If you're just slapping it on and expecting it to 'perform' better, whatever that means, then

[Rate-of-Twist]

Originally Posted by clydefrog

Man, some of y'all are proper curmudgeons. Internet forums have been cesspits since time immemorial and I hope it never changes

I think the F87 forum has a good thread discussing this exact same topic. and I will pick and choose this response there to summarize my feelings on it:



If you're not tracking the car you're not going to feel the impact of these 'performance' parts anyways.

If you are tracking the car, you should probably go for something more professional and adjustable for the situation you're in and the other modification you will be making.

If you're just slapping it on and expecting it to 'perform' better, whatever that means, then

I’m a firm believer in, You are what you aim for, so aiming for the accepted standard of cesspit seems less than ideal. (See how a counter point can be made without involving childish behavior?)

Ultimately, I think you’re right, as others have stated that there are better options for actual performance oriented aero upgrades.

My car will be tracked, as others I’ve owned before. That being said, this will be more horsepower than I’ve ever had, so upgrades are admittedly silly conversation before I even have the car. Originally my point in asking was most of the M Performance parts look more aesthetic, which I found surprising given the price tags associated. Up until now I have been only purchased parts for NC Miata’s and the price delta is pretty significant to say the least. (any negative comments and insults surrounding Miata’s are accepted and understandable &#129315

[clydefrog]

Originally Posted by Rate-of-Twist

You are what you aim for, so aiming for the accepted standard of cesspit seems less than ideal. (See how a counter point can be made without involving childish behavior?)

I'd rather have the forum be fun and unserious (childish behavior included), there are plenty other avenues for life to put energy into bringing to some sort of 'ideal' but hey, you do you.

Glad you have a better idea of what direction to take the car in. Hope you enjoy it!

[BRAKE!]

I think the M performance parts do go through some kind of wind tunnel testing. However, I am not sure if all pieces actually do much. Had they play a crucial role in downforce, there would be manufacturer warnings about purchasing single parts as it will throw off the aero (but it does not, you can buy parts a la carte)

Also, the speed at which aerodynamic downforce starts to play a role is very high. At highway speeds, even very aerodynamic cars aren’t getting their grip from downforce but rather tires alone. Check out Porsche’s claim for peak downforce for a GT3RS, 860 kg of downforce at 285 kph (~177 mph). Who’s driving at that speed even on the track?

https://media.porsche.com/mediakit/9...rs/aerodynamic

[Rx-7ames]

Boy did this thread get out of hand quick.

Anyway, BMW claims that there is a performance increase with their MP front splitter and spoiler. There is no information on specifics though, and I doubt you will find the actual answer to your question. If BMW did wind tunnel testing it isn't published anywhere as far as I know.

Additionally, when BMW first launched the MP parts catalog there was a recommendation to purchase the front splitter and rear spoiler together. They claimed that if you purchased just the rear spoiler then it would upset the aerodynamics of the car. That has since been removed, with no explanation that I know of. The M2 parts catalog has be a train wreck.

My final take is this: even if aerodynamics is effected by the MP parts, it will probably not be noticeable by most driving. Certainly not by my driving. So the parts I purchased were solely for looks. I went with the TRE parts from autoid. I have no regrets. The install was easy and the fit was nearly perfect. Mostly, the parts look great and I prefer them of the MP aero parts.

[AZG87]

Originally Posted by Rate-of-Twist

Completely calm here, just thought dumb ass crap like this was for the Honda Civic forums.

Let's leave the Civic talk at the kiddie table 🤣

[Rate-of-Twist]

Originally Posted by AZG87

Let's leave the Civic talk at the kiddie table 🤣

To be honest I’ve never found myself on a Civic forum so I actually have no idea what to expect but somehow in my mind it sounds like 20 year old me playing halo on Xbox Live (yeah I’m old)

That being said, the Type R is legit badass

[swagon]

Guys, it's very easy.

If BMW does not mention the word "downforce" or "reduced lift" in their press release about G87 MPP body kit, there's no reason to think the parts do anything functional. If they all were indeed functional, it would be written loud and bold in the first paragraph...

Big OEMs do test their aftersales parts in the tunnel physically and/or virtually. They also need to homologate them for road use. I know of one example from back when I used to work for a major manufacturer. They would send cars equipped with prototype aerodynamics kit to high-speed ovals around the continent to perform high-speed tests. The same manufacturer also was designing a big GT3-like rear wing that would not provide any downforce on purpose or else they'd have to do crash tests and redesign the boot hinges.

The F80/2 M Performance front lip and rear spoiler (replacement for the stock Gurney flap) were meant to be installed together so as not to mess with the aerodynamics, according to BMW themselves. There was a stiffening plate for the front lip included in the kit. This is backed by AC Schnitzer who claimed that their own rear lip spoiler adds a few kilos of downforce on top of the 30 kg of the M Performance rear spoiler's additional downforce.

The F80/2 CS front lip was designed to provide downforce in conjunction with the bonnet and rear Gurney flap. The front lip had a special bracket, so the splitter was mounted behind the impact bumper brace.

The G82 CSL parts are apparently functional and do add downforce so I can assume the G87 CS will get the same treatment in that regard. So just order those parts.

[KCuv]

Sure- They’re useful when you’re at a rate of speed that makes them useful. You/I won’t be, so they’re for aesthetics.

/thread

[Rate-of-Twist]

Originally Posted by KCuv

Sure- They’re useful when you’re at a rate of speed that makes them useful. You/I won’t be, so they’re for aesthetics.

/thread

So I just went and watched some YouTube video on the actual math that’s behind the point of what you posted… kinda embarrassed to be honest, you’re really right. I don’t know given the weight of the car even a track speeds I will notice any difference

[KCuv]

Originally Posted by Rate-of-Twist

So I just went and watched some YouTube video on the actual math that’s behind the point of what you posted… kinda embarrassed to be honest, you’re really right. I don’t know given the weight of the car even a track speeds I will notice any difference

It’s nothing to be embarrassed about- it is what it is- it’s all still “functional,” we just won’t really use it so get what looks best to you