08-25-2019, 07:05 PM | #1 |
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Rear wing downforce
I wanted to post a question, and while the mods may move this to the "cosmetic" section, it is more a question of function, and specifically track function.
BMW makes the performance rear wing for our cars (using IND website just to reference the products), and there is the racing wing from the M235iR cup car... as well as a variety of aftermarket options. I am assuming the BMW M235iR wing makes actual rear downforce, but I'm wondering what other wings actually do so... For now I'm going to drive my M2C on the street, but it will see its fair share of track time and I am hoping to "surprise" a few p-car buddies with the performance envelop of this car... so Im trying to research what aero is real, and what is just for show. Thanks to all for any input! {just a quick side note, because so often people chime in that driver training is the best mod... I could not agree more. I regularly race in WRL and Champ (formerly chump) and as part of our racing team we do get continuing private training with pros, both with data and side-seat.}
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08-25-2019, 08:57 PM | #2 | |
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A couple things to consider are balance and drag. Adding downforce to the rear is usually combined with additional aero on the front. Being able to adjust the rear wing can be nice to find a balance between the two. Drag also comes into play. How efficient the wing is at producing downforce is important & something to look into as well. It also looks like bmw expects more downforce out of the 235 wing based on their recommendation to reinforce the trunk - or buy their already reinforced one. That is not specifically noted for the performance wing. I’ve actually been looking for a wing for my M2 as well. I’ve been talking with ind about the 235ir wing too and plan to pull the trigger tomorrow. It’s kind of stupid money but to me it is the best looking wing (if I’m going to be that guy that sports a wing on the street this one looks the least DB to me) - that looks like it will also perform on the track. Without any CFD data it’s hard to say how it compares to other wings though - but would think bmw was satisfied enough with it to put on the M235ir. To me the performance wing is mainly a looks thing. APR has a few options but I don’t think anything specific for the M2. Nine lives racing has one that is very efficient based on their data but also not sure if they have a specific application for this platform. Might also check with bimmerworld - they might can offer some good advice on a full aero setup including the wing.
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08-25-2019, 10:29 PM | #3 |
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The M-perf wing looks more like a spoiler. It'll change the airflow coming off of the roof to be smoother and straighten it out coming off of the rear of the car. It doesn't look like it produces any downforce, but does improve aerodynamics.
The iR racing wing is an actual downforce wing. It's positioned high up so it catches the the airflow coming off of the roof, rather than just trying to smooth it out. When made more parallel to the ground it'll act more like a spoiler, but when angled it'll create drag and the airflow coming off of the roof will push down on it.
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08-25-2019, 11:20 PM | #4 | |
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08-26-2019, 10:11 AM | #5 | |
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08-26-2019, 10:14 AM | #6 | ||
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Great responses, thank you...!
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FarKLE, thanks... totally agree about the spoiler vs wing. Quote:
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Before: 2013 - 3.8L GTR, first DCT 2012 - 5.2L R8 v10, 6MT 2011 - 4.0L E92 M3, 6MT Last edited by Malakas; 08-26-2019 at 10:34 AM.. |
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08-26-2019, 02:33 PM | #7 | |
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Not just for the possibility of more parts being available - also excited to see how the M2 replacement stacks up.
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08-27-2019, 10:03 AM | #8 |
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I’ve been looking at Flossmann parts, specially the front splitter. Trying to find more info on how to mount it securely to the car instead of just mounting to the front bumper.
Who wants to pull the trigger and let us know? https://www.flossmann-bmw.com/en/bmw...mw-f87-m2-gt4/ AJ Hartman and Klauss composites aero parts are available for BMW as well. Not cheap but well made. https://ajhartmanaero.com/bmw/ https://klauscomposites.com/
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09-03-2019, 08:05 PM | #9 |
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What do you guys think of this? GTS replica... or actually something they've tested...??
Evolve Edison Carbon GTS Wing This size seems like a nice middle ground from the rear lip and the M235 wing... I wonder if anyone has fitted the M4 GTS OEM wing to an M2.... hmmmm.... let me search
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09-04-2019, 01:18 PM | #10 |
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I know Lightweight uses this on their in house M2 track car.
https://lightweight-titanauspuffanla...mw-m2-f87.html Couldn’t see it personally since the M2 had a bit of an”incident” at Spa and the wing itself had been taken off |
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09-04-2019, 07:37 PM | #11 | |
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09-16-2019, 04:04 PM | #12 |
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Ever since I put on a front lip (to complement my spoiler), my M2 has a tendency to oversteer at the limit, which I don't actually mind too much since it seems my front tires are a lot happier rather than screeching through every corner. I probably could use a wing to balance it out a bit, but I feel that it would look too excessive on the street.
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01-17-2020, 06:18 PM | #13 | |
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01-18-2020, 08:36 AM | #14 |
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Hey Jay,
IMO when starting to add pieces that create any real downforce you're going to make it more difficult to drive on our lovely Houston streets. Considering you are keeping the 80 / 20% street to track ratio, I would choose carefully. I had the M4 GTS replica pieces by RKP on my M4, and while it did add downforce at the track, it was a PITA to drive on the street, even with moderate lowering. There are definitely trade offs. Not sure if you were still in the market for this or not. Pic for reference.
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01-18-2020, 09:56 AM | #15 | |
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I completely agree, running a splitter like you had on the M4 would be near impossible on our roads. (Your M4 was killer though...!!)
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01-18-2020, 12:24 PM | #16 | ||
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01-18-2020, 01:06 PM | #17 |
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01-18-2020, 02:27 PM | #18 |
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I would do it myself, but the car will be at Steve's on Wednesday for an AP brake kit install. I'll just have it done there.
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01-19-2020, 08:50 AM | #20 |
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Yeah, I have the 19 Apex right now, but if I don't like the R888R I may go to 18's and my trusty NT01's.
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01-19-2020, 09:32 PM | #21 |
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Ill buy your Apex if you make the change. Im going to have to run the R888R on the OEM wheels... couldnt get wheels fast enough in 19s...
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01-20-2020, 03:12 AM | #22 |
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Vorsteiner knockoffs from either ebay or aliexpress (can't remember).
Glad I got knockoffs since they're pretty much wrecked from street driving, otherwise they're still functional. If I were to get the actual item, I'd raise my car a bit (currently lowered on coilovers) and add some sort of under-lip protection. |
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