Tech Talk: Manthey Racing GT2RS Wheel Discs Explained
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- เผยแพร่เมื่อ 21 ส.ค. 2024
- Cool fan discs! Cool brake cooling discs! What do those wheel caps do? Do they spin? I get so many questions and comments about these discs so I made a simple video explaining them.
The bottom line is they manage airflow around the rear wheels of the car eliminating by lift in the wheel house and controlling airflow around the rear wheels. This allows us to run 2degrees less rear wing which reduces drag and increases acceleration potential while maintaining the same downforce numbers!
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No explanation is needed. *THEY LOOK COOL* and *BECAUSE RACECAR* are two perfectly reasonable explanation.
Ricers are gonna copy this.
@@alphatrion100 *Rice, Rice, Baby*
That jacket and shorts. You British?
Oi bruv, wind it in!
Misha Charoudin. Being British myself I find your comment insulting. We wear sandals & socks. 😂
Before this vid I said “maybe I should change my shorts to jeans before some Eastern European gets all crossed up”.
Hehe yep. Jacket and shorts... gotta keep my legs free for fast pace maneuvering if needed.
Not to mention his shoes...
Kápsozta Töltött shoes gonna get their own video
"Hmm, i should check TH-cams, maybe something interesting got posted today"
Robert Mitchell posted new video 1 minute ago.
PRAISE DA LAWD!
Whew. Just in time!
"Shed a little light"
As the sunlight majestically hits the wheels
Hahaha thought same here!
I am loving this videos Robert! Keep them coming!
Thank you! I will do so. We have the next one loaded up/-)
@@RobertMitchell great video as always! Do you add more downforce or add a gurneyflap to the Porsche in the rain 🌧 or just run as it is?
Please keep doing these videos, love them.
You, Misha and a Manthey Rep. already explained this before, it was clearly, but it always great.
Please more of these kind of videos
Yes I still get asked Daily 🤣
Oh, nice. Always quality postings.
Thank you!
Thanks for the Video Rob. I needed something to take my mind off all the violence going on here in the USA right now.
It’s a mess right now Isn’t it?!
I had those on my Delta Integrale but only used front tires...They did cool down my brakes though...a lot
Your Delta was (hopefully still is?) a homologated version of a rally car. Your disks have vanes inside, acting as a cebtrifugal or radial compressor.
You got one hell of a cool car
Literally the first thing I saw on your channel and my first thought. Thanks for the breakdown and great content!
Thank you for the support
Good one Robert. Your the only dude that can talk and not break the video
I remember when Schummie said he could feel a tenth of a second per lap after upgrades or tweaks..
Doesn’t surprise me one bit!
Great idea! Thanks for sharing the meaning! I had always meant to look these things up but never new the word. Asked the Feed discord, turns out turbo fans. But for some reason this was at the top so nice to find that out as well!
These discs are old school. I remember BBS wheels with them on 935s and other cars of the day.
The Audi 90 IMSA GTO had them on all four corners. The tires were completely tucked but the turbofans were thick enough to be flush with the widebody.
Very cool vid, never thought it had that much effect on the airflow. Please entertain us more this kind of racecar coolness 🤙
More to come!
Clear that they work together, have a synergy with optimising for reduced drag without sacrificing downforce. BUT can you share anything on how airflow management along the sides helps downforce? I can’t imagine how it’s channeling more air through the wing, for example. I would have assumed reduced drag Along the sides would be the only benefit had you not clarified!
Great video and new channel.
It’s not actually just channeling air to the wing but stopping Lift in the inner wheel arches at The back of the car.
Can you do a video of your least favorite thing about each of your top 3 cars? This was definitely informative!
Let’s do it! Topic is now on the list
@@RobertMitchell Awesome! Can't wait and hello from Indianapolis (The Racing Capital of the World) haha
Thx for being generous on the info and viewer time, have a like sir.
My pleasure!
Today's lesson, turbulence is not your friend.
👌🏼👌🏼
Funny enough, sometimes it actually is. You might just want the flow to be turbulent before boundary layer separation occurs on an airfoil, at which point you'll significantly lose lift or control of the flow (lift still applies to car spoilers, just downwards tho, hence downforce, but the same principle applies), in fact some aircraft wings do have turbulence inducers.
Fluid dynamics are crazy, even weirder (and downright experimental more often than not) when turbulence hits.
Lovely, was not expecting this information outcome.
Love the technical highlight videos 🤓
“Straightaway” though 😬
Straightaway?
My very English mind has always struggled with the “Straightaway” (2.22) instead of just the “straight”
Ie : “Maximum speed at the end of the main straight”
It’s not my fault 🤪
I’m really looking forward to hearing your thought regarding LT vs R, once that arrives 🤓
....and of course seeing you all once travel is practical again 👍🏻
I've been wondering about the purpose of those for a while now. Very informative video, as usual. Thanks for sharing!
The photography on your video thumbnails is awesome
So cool. I've never seen anything like it. Glad you explained. Thanx.
Glad you liked it!
Very informative,as usual. After the 1st time you mentioned it in the MR package vid iirc, I researched it a bit and found that the works Honda Accord in the BTCC used a similar method in the 90s if memory serves
I’ll have to look that up too!
I think Nissan also did with the 98 Primera
Very cool! It’s like the car went to the vets and now you’re trying to stop it chewing at its wheel 😂
Very cool video. I got the basics of wheel discs right but I would have had no clue how much of an advantage it was, 2° is impressive.
I have a (probably silly) question though, why don't they put discs on the front wheels as well if it doesn't impact the brake discs airflow?
Thanks for the content!
Good explanation. Thank you Robert. Physics in action.
short, sweet, informative!
Trying to make them not TOOO long:-)
@@RobertMitchell don't mind longer vids from you guys tho! I find it fascinating because obvs in cycling discs are used in time trial, and it always seemed logical to me that especially with wider rear and 21? inch rims those wheels must create massive disturbance in the air flow!
1984 Corvette Turbine Rims also help with Cooling Brakes
great explanation... I never knew, thanks
my pleasure!
Very cool. A great Part 2 to this video would be to put some GPS tracking tech on the car and tell us what (a) the max speed reached on the main Nurburgring straight with the wing in its lowest downforce setting and rear wheel disc attached VS (b) the rear wing in its maximum downforce setting and no rear wheel disc to aid airflow. That would be incredibly cool to find out!👍🏻
I think it would be cool too but we will see if I can get that sort of time hehe
Gotta love 1970s sports car racing tech on modern cars.
Not sure if anyone already asked...but while the idea sounds brilliant, why don’t I see more race cars or trackday people utilize these? ...especially when this doesn’t seem to be very costly and return on top speed is worth it.
They have rims that are specially designed to cool the brakes but most people worry about Aesthetics instead of function
Many F1 teams ran aero covers back in the day too.
Thank you, Robert, for the detailed explanation of the wheel disk. I cannot recall where, but I remember seeing something about the MR rear wheel disks helping with downforce, but it did not give a quantifiable benefit as you did with the 2 degrees less angle on the wing. I can understand having 'less' wing causing less drag, but do the wheel disks themselves add any drag? Or, is the smoother airflow around the rear of the car all benefit without (performance) cost?
Used to run them on Porsche 935 but a little different design
Turbofan wheels, lollipop seats and big turbos, gotta love the seventies and eighties. When the M3 collection is complete, maybe DP Motorsport should do a 935 K3 replica.
Yes the Apple computer car is 🔥🔥🔥 and id love one!
One of the best if the best cars on you tube :
Please Roberts buy the Nurburgring and make it great again!
Haha i wish
@@RobertMitchell actually it must be a great deal, you don't have to pay for useless square meters such as run-off areas...
Sent this video link to my wife to justify my new wheels...
Have her message me I can completely confirm and support your case
Loving these videos. Keep it up.
I really, really, really liked this video, thank you. This was really helpful.
Ive seen them on the 935/78 and always thought they aided brake disc cooling as well as the obvious aero effect
I have to see this demonstrated in a simulation. Amazing.
Love the car. Dream setup. Loved shmee video with the gt3rs on the track.
Glad you’re enjoying the vids!!!
That’s badass! Did not know that! Thanks for sharing.
No problem!
Very cool, had no idea what those were for. Thanks for explaining!
I recall seeing this for the first time on a DTM Mercedes 190 evo 2 they looked nice with those one the wheels it just really complimented its body design on top of being functional
Great informative video. I just learnt something new.👍
Thank's for the vídeo Robert!
Cool vids Robert !
Thx man!!!
Cool tech talk, right up my street really interesting... thanks for your time.
One question, in your opinion why do you think the McLaren Speedtail have something similar (wheel discs) on the front wheels but not the rear ... are they to aid brake disc cooling In it's case, or do you think again it's about aerodynamic/downforce/drag?
Aero for the McLaren. It's mainly for top-speed and to lower drag. It also helps not disrupt the airflow because some hot air will be expelled from the front wheel-wells as some of the radiators live there.
I love the OG turbo fans
I would rather have that tiny bit more drag on acceleration instead of these wheel discs. No offense but boy do they look awful... I of course understand the idea behind it, obviously Manthey doesn't tune cars for their looks. Very interesting video regardless though, of course. I obviously never liked their looks but was definitely always curious what they exactly do or rather how they exactly work towards the wing. Loving these little tech quickies Robert.
They look good on a few cars
On the track, looks isn’t all that.
Thats really cool, and thanks for putting up a video to explain. How did you determine the 2 degrees less rear wing? Was it through modelling the changes, or just through track testing? Or a combination of both?
This is something that Porsche and Manthey Racing determines through a mix of both types of testing !
@@RobertMitchell that's awesome! Really cool stuff
Explains the C4 Corvette's wheels.
Waiting for the GT3 Cup MR Pro full vid to be released!!
Great explanation! Before this video I thought all these wheel discs did brake cooling. In the video you mentioned "they are not turbo fans", but do "turbo fan" style wheels /adapters etc actually do brake cooling or do they serve a different purpose all together? Or do any of these "fans" actually fan the brakes?
I’d have to look up each style to see. There are so many applications of them and I think it’s a mix. What you see today I assume is mostly aero as we’ve found that cooling brakes from the center is better than through a wheel
Good video
Good comment
Pretty interesting video, well explained. You replied to and liked a comment of mine from a while back, and I never noticed till just now-sorry! I’ll go through and like a bunch of your videos, ha.
Haha im the first to know how hard it is to see new messages on here!!!
Very interesting thanks for another great video
Nice video. Keep em coming
I learnt something....thanks bro
Any time!
Good explanation! I wonder if it also affects the temperature of the brakes.
Great video! Thanks for the information...
Love the videos
ok
AIRMGMT, your next plate
Great explanation! So why not cover the whole rear wheel with disc? Or is it a brake cooling concern? Also, why not do the disc in the front wheel too, just like those on F1 cars in 2000s ?
Oh, weight of the wheel should be another consideration too, right?
Hub caps are making a come back. Who would have thought. 🤔😂
It's not just hub caps idiot. Its serves purpose.
Cool - where are my old frisbees? Getting the duct tape now...
Nice content!
I believe you have less drag not only with less wing angle but also with less air detachment in the boundarie layers of the car. As you said, more stream line effect of the car through the air.
Interesting - I would have expected some form of extended fender to resolve that but it’s done with no body modifications and very little added weight -
seems like an efficient way to go !
Wonder then why Lancia Delta factory rally cars had these wheel -discs fitted to the front wheels?
I will look into some of the cars that had such discs and maybe do a video on that
Loud and clear. More like canards, do you agree? I wonder, are the no rims with this feature? Of are they way outside the rims?
Ordered a couple of Frisbee's to bolt on my Feeza ST :):):)
why does the Speedtail has the discs in the front wheels?
Maybe I should ask and do a video on it
@@RobertMitchell THat would be greatly appreciated and great to see!!!
I figured they would decrease turbulences. And I also think they look really good. But are the discs part of the rim or can you separate them?
You can separate them :-). I think they look cool too!!
Again great vid!!
I'm no expert but I am in the industry. Higher downforce will not decrease acceleration but top speed as its effects multiply North of 80mph.
Don’t confuse just downforce with drag.... also I’m talking about acceleration on one of the fastest tracks in the work on the fastest car. We see near 250km probably 10 times in one lap and 300 as a top speed at two places on the track. If there is enough drag to slow a car’s top speed it can only reduce its acceleration to that top speed. (Unless it has active aero) which this doesn’t.
Without active aero it’s impossible for drag not to slow acceleration
They used those long time ago on Lancia Delta Integrale rally cars too...(i.e. i.pinimg.com/originals/17/c3/e5/17c3e56ebac8e4914e5d3032d94f436f.jpg)
I'm really interested in decreasing drag on my 997tt. How were you able to measure differences that these wheel discs make? Through software, wind tunnel testing, or wool tufts. Why aren't you using them on the front wheels also? Did you add any additional underbody panels around the motor to help maintain more attached airflow? I find it odd that Porsche left the back exposed.
So basically the same as the aero wheels on a tesla or other electric cars.
essentially the same concept
Looks like the discs would be useful in the 1/2 or full mile runs. Who makes them, and where can We purchase a set?
You can only buy them as part of a full MR!!!! They also only fit on the BBS wheels that Manthey has made for them!
Wow, so much hate! @robert mitchell thanks for explaining that! Can you go into detail as to why or where that turbulence comes from that lets you adjust the wing 2 degrees? Is it air coming out of the wheels that creates that drag? Thanks!
Will do for sure!!!!
The real question is, why isnt it bigger. Its a turbo fan why is it only covering effectively half the wheel
Who said it’s a turbo fan? I think the video said it’s NOT a turbo fan.
@@RobertMitchell this is nice..but question remains. It covers half the wheel why?
Some older cars with the wheel discs had blade style. Can you talk about those?
Thats cool ... yup
Great explanation! Thanks!
Please if you find any time make video about rear wing of the car ty.
You’re in Germany right?.... new subscriber love the knowledge 🤙🏻
The Drive Inside: Yes, he runs a business at the Nurburgring 👍🏻
Yes! In Germany and thank you for the Sub:-)
Now I know why a lot of older rally cars ran with that type of wheels
Awesome video
Good stuff!
Cool video 👍🏻
How about in 80s wheeldisc on front wheels on a WRC car? It is for the breaks right
I think that looks very bad as.
id have to look them up to be sure
@@RobertMitchell thanks, not much info about that, always wonder about it
9th! Word 👌🏼
Fire
The idea and entire R&D of this was done by Manthey Racing?
Yes
How are these discs attached to the wheels?