Video: Dahlback Racing's RS6 - 535 hp

[Erik]

Here's a video of Dahlback Racing's RS6 with 535 hp.

http://www.audituning.com

Video: 535 hp Audi RS6 by DBR (http://www.bostream.nu/rs6/DBR-RS-6-535hp.wmv)

As some may remember I visited DBR earlier this year and drove this car. The video shows a low 13 run, but the car has performed high 12s. The goal is to run an 11 second run.



More info: RS6.com visits Dahlback Racing

http://www.rs6.com/forum/showthread.php?s=&threadid=2897&highlight=dahlback

DBR RS6 + in front of the White House :)

http://www.rs6.com/pics/Various/DBR-2.jpg

http://www.rs6.com/pics/Various/DBR-10.jpg

http://www.rs6.com/pics/Various/DBR-11.jpg

[steve]

Doesn't a stock RS6 already run high 12's to low 13's?
So with 85hp more it should be a lot better, not?

[avdh]

Right Steve, I also wonder.

There is a Chipped RS6 around here and so far on the Q mile I am faster than him and 1 km/h slower after 1 km, only after that does he edges away....

I really wonder what's the point of chipping if you can't get at least 0.5 to 0.7 second faster at the Q mile.

[Erik]

Remember, this car is on 20" which doesn't improve the performance at all.

Most cars that were officially tested on the 1/4 mile use 18".

[Erik]

Time card

[rs6_newyork]

Originally posted by Erik
Remember, this car is on 20" which doesn't improve the performance at all.

Most cars that were officially tested on the 1/4 mile use 18". Why would this be so? even if the total wheel radius was slightly more, that does not remove any horsepower from the car. And 1/4 mile time is a product of HP over the last few K revs, and drag.

eg: changing a rear diff ratio will not change 1/4 mile times much at all: any change seen from that is just a result of whether or not the engine can spend more time in peak power band, or has to do an extra shift just prior to the very end of the measurement...

[Erik]

Originally posted by rs6_newyork
Why would this be so?

Radius and weight (in the wrong place) is increased.

When I drove this car it did around 100-200 km/h in <11 secs.

[rs6_newyork]

if they are forged rims they can be lighter than stock even at 20", yes?

as for radius/gearing - I really don't think that makes any difference. Power in - power lost = power out. Increasing radius (changing gearing) does not change this equation at all.

[ming 2.7t]

cant see the mph. I wonder if there is a leak somewhere. It got to the 1/8 OK but it should be flying at the end.
A friend with an A6 ran 12.994@106.04mph
1.915
8.391@87.09
12.994@106.04

I would think the RS6 would be real strong up high????

[Erik]

Originally posted by ming 2.7t
cant see the mph.

Qrtr mile says 172 km/h = 107 mph.

What A6 was it? Remember the RS6 comes with auto.

[ming 2.7t]

friends six speed.

My Tip A6 only ran 13.6 @103mph with detuned software. NOw that car will do low 13's but have yet gone back. Added different software and DP's.

I had though a stock RS6 would trap around 108-110 but it seems I am way off.

The RS6 was at 86.5mph at the 1/8th and the A6 was 87mph, then the RS6 finsihed at 107 versus 106. I would have thought at that point it would be a greater difference since it was a chipped RS6.

[Erik]

Check this one as well:

http://www.rs6.com/forum/showthread.php?s=&threadid=4781&highlight=hoppen

[SpinEcho]

Originally posted by rs6_newyork
if they are forged rims they can be lighter than stock even at 20", yes?

as for radius/gearing - I really don't think that makes any difference. Power in - power lost = power out. Increasing radius (changing gearing) does not change this equation at all.

Bigger diameter rim = more rotational mass over a larger circumference. Even if a forged 20" rim was lighter than the stock 18" rim, it would have to be a fair bit lighter to compensate for this.

I remember very well my Passat 1.8T - after I put 17" HRE wheels on it (forged!), it was significantly more sluggish on standing starts and on throttle tip-in, compared to when it wore 15" stock, cast wheels.

[audirs6sport]

Originally posted by rs6_newyork
if they are forged rims they can be lighter than stock even at 20", yes?

as for radius/gearing - I really don't think that makes any difference. Power in - power lost = power out. Increasing radius (changing gearing) does not change this equation at all.


c it's not just about the wheel itself being lighter, it's also the tire size. you can get low profile tires for the rs6 if u were to go with 20's. however, they do not have tires that are thin enough to make compensation for the increase in diameter size. you gotta remember, u need to take the overall diameter into consideration ( wheel + tire ) not just the wheel itself. by going from 255/40/18 to 255/30/20 will set you back some revolutions per mile rate. it's laws of physics called rotational inertia. weight shifting further out (stretched out) will require greater amount of force to complete a revolution vs. prior. watch those ice skaters as they curl their body in, they begin to spin at a higher speed. it's a good example.

[audirs6sport]

Originally posted by Erik
Remember, this car is on 20" which doesn't improve the performance at all.

Most cars that were officially tested on the 1/4 mile use 18".


ouch!! 20's!! that's only for showin off, not for racing!!

[nyrs6]

Originally posted by ming 2.7t
friends six speed.

My Tip A6 only ran 13.6 @103mph with detuned software. NOw that car will do low 13's but have yet gone back. Added different software and DP's.

I had though a stock RS6 would trap around 108-110 but it seems I am way off.

The RS6 was at 86.5mph at the 1/8th and the A6 was 87mph, then the RS6 finsihed at 107 versus 106. I would have thought at that point it would be a greater difference since it was a chipped RS6.

http://popularmechanics.com/automotive/new_cars_trucks/2004/5/acceleration_nation_2/index5.phtml

they did 13.1@108 stock. But my dad did 13.4@105.5 we could have done better but we didnt know we had to let the car cool down. I think someone on this board did 13.1@107.

does anyone know if the RS6 that ran had down pipes?

[J0X]

:vhmmm: That doesn't seem right. Inspite of its weight/tip, you'd think it would perform better than that. By the sound of things, it's almost like the tip shifts around 4K RPM.

[Erik]

Originally posted by nyrs6
http://popularmechanics.com/automotive/new_cars_trucks/2004/5/acceleration_nation_2/index5.phtml


Nice article. Thanks!

If you read it, note the RS6.

[Matteus]

it has nothing to do with the Weight of the wheels, it has idd to do with the size of tire & wheel. (Audirs6sport said it right).
we used to run 17" brabus monoblok II on the right side, and 17" brabus monoblock III on the left side of the 300E. same size but quite different weight. the car was as balanced as with 4 equal wheels. rotating MASS does not make a difference in drivingfeeling/handling/balance...., rotating SIZE does.


matteus

[audirs6sport]

Originally posted by nyrs6
http://popularmechanics.com/automotive/new_cars_trucks/2004/5/acceleration_nation_2/index5.phtml

they did 13.1@108 stock. But my dad did 13.4@105.5 we could have done better but we didnt know we had to let the car cool down. I think someone on this board did 13.1@107.

does anyone know if the RS6 that ran had down pipes?



yeah stock rs6 ain't exactly fast on drag. it's a great car to mod though. UPGRADE THEM TURBOS!!!!
:addict: :addict: :addict: :addict: :addict: :addict: :addict:

[Erik]

Many of my friends tuned their M5s and got a nice increase in power.

They were faster than their rivals in stock M5s.

Then they mounted 20" and the rivals perfomed equal.

[rs6_newyork]

Originally posted by Erik
Many of my friends tuned their M5s and got a nice increase in power.

They were faster than their rivals in stock M5s.

Then they mounted 20" and the rivals perfomed equal.
I'm surprised there is much detectable difference between 18" and 19". Audi sell 19" as an option. Do those who picked that option notice significantly different 0-60 or 1/4 mile times?

I went from stock wheels 18" to 19" BBS. The rim is (slightly) further out, on the other hand, the wheel is significantly lighter overall so there is less metal there as well. AND, the tire, being lower profile, has less sidewall.

put a car on a lift and have it accelerate its 18" wheels to 100 mph. Do it again with 19", thus measuring only change in rotational inertia .. whats the difference? 0.1 of a second? some physics math (not mine!) can probably even calculate the HP lost in rotating 4 wheels to 100mph that have 4lbs more on the rim..