SebringSilver

I was just wondering...judging by the looks of our stock rear diffuser, they look like they're purely cosmetic and don't serve any real purpose. I could be totally wrong, of course, but seeing as how the strakes on the diffuser aren't particularly pronounced, I'm unsure as to how effective it really is.

The strakes on a Black Series or an SLR diffuser seems much more prominent and just going by my layman's perception I'm inclined to think those examples are likely to be more functional than the ones we have on our cars.

Anybody ever thought about this?

And is anybody wondering why Revozport et al aren't offering us an aftermarket diffuser with more pronounced strakes?

BAD430BENZ

i questioned the same thing . i like the ones on the black series . i was gonna try and get one of the other ones to custom fit to my 63 .

SebringSilver

I wonder what improvements, if any, a more pronounced rear diffuser would bring in relatively normal driving conditions.

MercPlease

I believe the Euroteck one is slightly more aggressive looking but I don't know if you'd see any improvements...

bushburninc63

good question, the car feels pretty stable at excessive speed and the smoothness of the car going to 100mph was effortless. So I can't tell you if it's functional or not. :o

Sheep

It is all physics, if you track your car and corner at speed above 60 mph than it matters, otherwise it is mostly for looks.

Jae Duk

So if we only go in a straight line and don't do hard corners we could "essentially" just take it off and reduce the weight?

Sheep

http://en.wikipedia.org/wiki/Diffuser_(automotive)

Not that extreme, but for straight line driving behind traffic on a highway doesn't really make the diffuser worth while either. The question is that will you NEED the extra down force the diffuser provides for your driving style.

revozport

Hi there,

Our RBS C63 Carbon Rear diffuser is the only diffuser on the market that accomplished with the Ground effect panels and a more agressive fins.



Check out our pictures;
http://s167.photobucket.com/albums/u...02%20BKS%2006/



Price is now US$1400 Shipped

Thx

Ken

SebringSilver

Looks good. Is it difficult to install?

Dads C63

Ken,
We are preparing to run the Texas Mile in October. Will your RBS Carbon Rear diffuser help with the stabillity of the car in straight line runs at 200+mph? Does it have enough attachments securing it underneath to hold up under high speed runs? Your suggetion?

Thank you,
Keith

Dk1

Judging from the article on Wiki per Sheep, C63 diffuser should have 'some' functionality despite its modest appearance. However if that's not enough how about this from VATH. This was installed on C63 estate.

Dk1

My bad. Picture was too small. I am not used to uploading this stuff so forgive me..

SebringSilver

Wow, that looks very aggressive...almost too aggressive.

MacGCU

I think it looks sick, but the website is all in German. Any clue on pricing for that rear diffuser or where to purchase in the US?

AMGC60-3

Yeah, I just read about the Vath C63 it also has 585 hp

LZH

None of the diffusers on these cars including the Black Series add any downforce whatsoever. The black Series diffuser is not really a diffuser (same with C63, SL63 etc...) it just houses the cooler for the dif.
The Revozport piece pictured above will not add downforce from what I can see...Unless of course they have down windtunnel testing to back up claims, which I highly doubt. It will however smooth the airflow a bit, but hardly noticable except for very high speeds.

DaGS1800

The diffuser may have some minor purpose as far as performance is concerned, however the CLK BS diffuser is not more efficient than ours and serves the SAME purpose which is mainly to be cosmetic although there IS a slight advantage to having it... The SLR is a different story...


That is entirely untrue; Euroteck also makes a diffuser with more aggressive fins... The ground effect is also unnecessary and extremely overpriced, especially when combined with your diffuser price ...

May I suggest making the ground effect part in an alternate material rather than carbon fiber to decrease the price since you don’t even see that part anyway...

DaGS1800

+1

That’s exactly what I thought... Not to mention the ridiculous pricing for the Revozport diffuser+ground effect and if you opt to NOT get the ground effect with the Revozport diffuser it will create an aero drag which will slightly make your car slower at high speeds. This is what I have been told so I am not positive how serious this effect would be, but why would you want to pay top dollar if it’s true (even if it’s a slight effect)...

Sheep

+2, it is a very expensive way to protect the rear underside of the vehicle more than anything else, not to mention you can spend the money on better tires to get even more grip that you can ALWAYS use.

SebringSilver

You learn something new everyday on MBWorld.

revozport

Just want to clarify a few points, the RBS rear diffuser with ground effect is not meant to sell seperately because the diffuser is deeper than the original AMG version to make way to fit our ground effect panel. And yes, if you take out the panel, it will create drag because the rear diffuser is basically blocking the wind instead of diffusing it.




Furthermore, I must admit although we do not have any wind tunnel with loads of figures to support our claim. All testing were done by personal test drive at speed of 240-260km/h straight. We believe if you can feel it, it's there. If you can't feel it, even we provide a bunch of figures and graphs, it's not significant enough right?

The CLK BS diffuser is deeper really just because of the cooler sitting behind and I'm sure it does create some sort of drag.



Otherwise, people won't do this to their CLK BS;






The design of our RBS Diffuser with the ground effect panel is to eliminate the drag and have the air flow smoothly towards the diffuser.

revozport

In terms of pricing, don't forget we offer 10% discount to all mbworld members and can offer better Group Buy discounts.

GHAZAN

And what about making the undercarriage part out of ABS painted black or something like that to reduce costs significantly since it can't be seen unless laying on the ground?

revozport

Yes we can offer the ground effect panel in FRP instead of Carbon to lower the cost.

Price would be around $900 inclusive of shipping, but we require min. 5 sets as this is consider a special request order.