Coweling and engine bay aero

[martymil]

This thread is scaremongering shit by the op.

That video has nothing to do with engine aero, by cutting your cowl you actually increase flow through the engine bay and directing the air over the wind shield causing extra down force on the car, but it does increase drag.

7.00 to 7:30 talks about air getting under the car, get a front lip to combat that or dont as it will make stuff all difference to engine aero.

Most cars will never see over 145mph, god forbid we all will flip, crash and burn our cars.

Great video full of paid advertising where to get your products.

 

[martymil]

@The Convert the only Dumb shit statement is this thread is the dumb shit you spewed in the original post.

 

[martymil]

Keep abusing the rep system dumb ass you been banned for it before.

 

[The Convert]

@The Convert the only Dumb shit statement is this thread is the dumb shit you spewed in the original post.

If you think the OP is dumb shit and “spewed” then you need to grow up, go back to school, and pick up a dictionary and thesaurus because you’re lack of knowledge, language deficiencies, and ability to use logic and reason are showing.

 

[The Convert]

Keep abusing the rep system dumb ass you been banned for it before.

Keep abusing the rep system dumb ass you been banned for it before.

@doublespaces and @fmorelli do either of you mind having a short read of this thread and pass judgement on what’s going on. I’ll stand behind your assessment regardless of outcome. Thanks!

 

[iminhell1]

It's like being in middle school all over ...

 

[Torgus]

I know there have been numerous discussions on this in the past between those that chopped their coweling up, swapped to M3, or removed it all together. I can't find it, so I am putting this here. The portion of the video discussing the pressure zones and direction of airflow through the engine bay start around 7:00-7:30. Great watch overall and recommend it to everyone interested in modding.

@doublespaces please fix if not done correctly, but be gentle, it's my first time.

I think this is a great video and an informative thread. Until @martymil got all up in it mind you. I linked it to a few friends who thought the video was interesting and they might play around with a few things on their 'race cah'.

I thought @martymil was too busy to post on the forums because he had to run his business? Which is amazing he can run a business considering how much time he spends running his mouth on the forums and shills for you know who. Unless of course someone asks about his casting experience and then he suddenly gets all quiet and you can hear the crickets. So strange.

I'd neg rep all those posts too.

 

[Torgus]

The reason they leave the cowl in is to stop oil and coolant from going all over the windscreen especially in a race car as engine failures happen a lot,

Now imagine going 130mph plus and your enter a long sweeping bend and your engine blows.

Some day you are going to wake up and realize the amount of bullshit that you have spewed.

 

[martymil]

Anywhere there is air flow there is aero. It’s as if you don’t even understand what the words mean. 20 years ago?!?!? Did auto manufacturers even use wind tunnels or have computational air flow models 20 years ago?

Such a silly boy question, it's been around for more than a century

[PDF] 0 STATE-OF THE ART IN COMPUTATIONAL AERODYNAMICS | Semantic Scholar

The view of the state-of-the-art in computational aerodynamic capability and assessment of the issues that drive future aerodynamics and aerospace vehicle development are presented. Computational aerodynamics, which complement more expensive empirical approaches, are critical for developing...

pdfs.semanticscholar.org

 

[impuls]

The car was speed limited from the factory for a reason as it wasn't designed to run high speeds.

Actually that's not the reason. There is a gentleman's agreement among German automobile manufacturers to limit all "normal" cars to 250 km/h. That also applies to most BMW M models.

 

[martymil]

Actually that's only part of the reason.

Quote from quara


It was a gentleman’s agreement back in the 00s. Motorcycle manufacturers had a similar agreement back in the 90s to limit their bikes to 189mph.

It was initially implemented by German companies including Mercedes and BMW fit 250kmh/155mph limiters to most of their cars as part of a voluntary thing to appease the greens and the anti speed "safety" lobbyists. This is a form of self regulation in order to stop actual government imposed regulation which of course may well be harsher.

For example Andreas Troge. The President of Germany Federal Environmental Agency (UBA). He is very anti car. In 2004 at a conference for the environment he grilled carmakers for using technological innovation to increase engine performance, rather than reduce fuel consumption. He even called for r a 75mph speed limit on all German autobahns.

Similarly Japan had an agreement too, not to exceed 276 bhp. Nissan had been cheating with the R33 and R34 GTR, the R33 produced around 290-300 while the R34 could hit almost 330bhp.

Additionally the gentleman's agreement means costs can be saved as you don’t have to put ZR rated tyres on your cars any more (ZR tyres are rated up to 190 mph) and you can put slightly cheaper Z rated tyres on them rated up to 160mph.

unquote.

When you limit the car to 155mph they don't have to design them to go any faster.

As much as we want to think the BMW's are great cars and are but in reality to most Germans they are just taxi's, like our own domestic cars are to us.

 

[impuls]

Thanks for explaining how Germans feel about German cars and speed limits @martymil
I am German by the way

 

[martymil]

My German neighbour which keeps making fun of my fast taxi so I guess I'm going of what he told me.

He is one of the most genuine blokes I know but I guess he must be lying then.

 

[The Convert]

Some day you are going to wake up and realize the amount of bullshit that you have spewed.

I only “disagreed” because I don’t think he’s self aware enough for that to ever happen. You say he’s a shill for Tony...he acts like he’s Australia’s Tony.

 

[The Convert]

If you read what I wrote earlier than that they also use it for fresh air entry for the aircon and cabin, your argument is mute as there is no engine.

You can't cherry pick part of an argument and then say you're right and they're wrong. That's not how adult conversations/debates work Marty..

 

[The Convert]

Such a silly boy question, it's been around for more than a century

[PDF] 0 STATE-OF THE ART IN COMPUTATIONAL AERODYNAMICS | Semantic Scholar

The view of the state-of-the-art in computational aerodynamic capability and assessment of the issues that drive future aerodynamics and aerospace vehicle development are presented. Computational aerodynamics, which complement more expensive empirical approaches, are critical for developing...

pdfs.semanticscholar.org

Why would you link an article that is 100% about aero and astronautical use of cfd and model based design when I specifically said AUTO MANUFACTURERS? Of course computer modeling has been around for decades. It was used to design the f117 in the 70's. Try again Marty.

 

[The Convert]

@doublespaces @fmorelli Can one of you clean up this thread, or allow me to. It's been completely derailed and is a solid topic that people would like to have real discussions about. Much appreciated.

 

[fmorelli]

@doublespaces @fmorelli Can one of you clean up this thread, or allow me to. It's been completely derailed and is a solid topic that people would like to have real discussions about. Much appreciated.

Will take this offline via PM.

Filippo

 

[martymil]

Why clean up the thread @fmorelli so @The Convert can edit out how wrong he was all along.

Under bonnet aero

 

[The Convert]

@The Convert Cherry picking huh, must be cherry picking this too.

He is the latest race car from BMW Racing, where is the holes in the bonnet and guess what no cowls.

Its a purpose built speedway car that races in your country

LOL



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With reference to the cherry picking comment, without properly quoting, you’re taking it completely out of context and applying it to a different conversation all together. It’s misleading at best.

Now, with reference to the BMW Racing car, that is interesting, but is inconclusive without seeing the underside of the hood and knowing what the full aero package looks like. We would need to see that info to make a full judgement.