vergleichsfahrt tunetec airbox B7 vs. kompressor B7 mit tunetec software
Futrell Autowerks: APR Supercharged RS4 Before/After Dyno Testing
The Futrell Autowerks Team delivers you the before/after Dyno results from our
installation and Dyno
testing of our 2007 Audi RS4 both before Supercharger install and after.
Filled w/Oregon 92 Octane Fuel
APR Stage 1 Tuning 91 Octane Mapping
Full Milltek Exhaust
31K Miles, Never had a carbon clean on intake valves
Power produced at wheels 306 WHP 260 ft.lbs of wheel torque
Filled w/Oregon 92 Octane Fuel
APR Stage 3 Supercharger Kit W/91 Octane
Full Milltek Exhaust
31K Miles, Intake Valves cleaned of carbon build-up during Supercharger installation
Power produced at wheels 450 WHP 395 ft.lbs of wheel torque
Dyno correction is set
at zero, smoothing at 5, ambient temperature high 60's/low 70s (Fahrenheit)
Power measured at all four wheels on a Dynojet 248X - Not owned or
operated by Futrell Autowerks or APR.
Are you interested in supercharging your RS4 or 4.2L FSI RS5 or S5? Please
contact us for a comprehensive quote, logistical services available we have
over ten years of experience working directly with APR to deliver the
ultimate in reliable, drivable performance upgrades for your Audi or
MTM Supercharged B7 Audi RS4 Clubsport! Launch, 8250 RPM, Crazy Insane sound!
Test drive of MTM's Amazing Supercharged B7 Audi RS4 Clubsport!
The MTM RS4 Clubsport. What praise can we possibly give to the regular RS4
that hasn't already been said? It's simply a phenomenal and highly-capable
4-door unlike anything else available. In stock form it's good enough to
lap the Nürburgring Nordschleife quicker than any other 4-door sports
sedan on the market. It's exceptionally luxurious and well equipped. It
also comes with the tried and proven all weather conquering quattro
driveline now with a rearward torque bias. It's not perfect to all people
though. And so where there's room for improvement MTM steps to the
The centerpiece of the MTM RS4 Clubsport package is the liquid-to-air
intercooled, Lysolm-type, belt driven Supercharger that resides directly underneath the
carbon fiber bulge on the hood and feeds the car with 0.45 bar (6.5 psi) of
fresh air. This cleverly designed package sits smack dab between the
cylinder heads within the "V" of Audi's 4.2 liter V8 and Boosts power levels to a very impressive 535
horsepower and 428
ft-lbs of torque. The engine internals and compression ratio remains 100%
stock. A special carbon fiber vent on the hood gives extra clearance to the
Supercharger and helps keep underhood
temperatures checked. The blower assembly completely replaces the stock
variable length intake manifold.
It's important to note that the RS4 Clubsport is still a prototype, meaning
it is quite clearly a work in progress. The final version will certainly be
finely finished and up to OEM standards and aesthetics, as with all MTM
vehicles. The particular Supercharger on
this press car has actually been adapted from a standard S4 application,
which is evident by the holes in the intake runner where an IDI fuel
injector would normally reside. This same system is available on the normal
S4 and can produce up to 503 horsepower.
Roland has set the development durability goal of 50,000 km for this
Clubsport RS4. This means he is not going to release the kit into
production until the test car reaches 50,000 trouble free kilometers on the
stock engine internals. Currently, the press car has seen roughly 15,000
km, so there is a ways to go. However, press cars tend to see slightly
more, ummm, "wear and tear" than the average car so one can rest assured
that it has been thoroughly tested and developed under all conditions. We
drove this car hard, and it ran well without a hiccup.
Development of MTM's Supercharger system
was far from easy. Three important factors contributed to the overall
difficulty of the project; size (component packaging), heat, and ease of
Audi has already used up nearly all available space by just fitting a V8
into the A4 chassis. They've shortened the engine length as much as
possible by using smaller than usual bore-to-bore spacing and fitting the
accessory/cam drive to the back of the engine. This didn't leave Roland
much real estate to work with on the front side.
A Supercharger setup works by turning an
air compressor (blower) mechanically with a belt and pulley system. The
extreme revving capability of the RS4 engine means the entire belt drive
system must be able to withstand high speed and high torque operation. At
full Boost, the Supercharger can require 50 or more horsepower from the engine
to spin itself, which must be transmitted through this belt. Considerable
effort went into designing the belt/drive assembly to fit into the small
space and function without slippage under all conditions.
The additional heat generated by this setup necessitated the carbon fiber
scoop which peeks menacingly from the hood area. MTM also concluded
intercooling was vital for safe and consistent power delivery. Trials
without intercooling showed that intake air temperatures would climb too
high, which in turn would decrease power output as the ECU pulls back
ignition timing to compensate. Higher temperatures also increase the
likelihood of engine knock, not something welcome to an owner when a
$30,000 RS4 engine is in stake. The water-to-air intercooling system taps
cleanly into the factory cooling system adding an additional heat exchanger
before passing through the Supercharger.
"Power is nothing without control". This cliché statement holds especially
true with MTM's RS4. Simply adding more power to a stock RS4 would result
in a less rounded vehicle, perhaps not as effective overall as what
originally rolled off the line at quattro GmbH. The remainder of the
modifications were therefore designed to make maximum use of the additional
power produced by the Supercharger.
Weight saving measures bring the curb weight of the Clubsport down to a
claimed 1660 kg (3650 lbs). This is about 350 lbs less than a US-spec RS4
even while counting larger brakes and additional safety features.
Futrell Autowerks Presents: APR 4.2L RS4 Supercharger Installation
The Futrell Autowerks Team takes you through the installation of APR's
Stage III Supercharger kit and FSI
Carbon Clean on a 2007 Audi RS4. Actual installation time with carbon clean
was about 25 hours. APR's engineering and design team hit a home run out of
the park with this kit, the installation went off without a hitch and the
power delivery is ultra smooth and blistering fast. Kit price $14,999,
Installation is $2999 which includes before/after Dyno testing and a twelve
month/12,000 mile parts and labor warranty. Clutch upgrade and carbon clean
are additional and both recommended. Find us on Facebook at
http://facebook.com/futrellautowerks. This video is part of a playlist that
includes before and after Dyno results so be sure to check
out our other build series videos.
APR Supercharged Audi RS4 @ DC Performance in Los Angeles
Kevin Waters 2009 Supercharged Audi RS4 at DC Performance in Los Angeles
for Dyno Testing. DC
Performance utilities a 4 wheel drive Dynpack Dyno. DC Performance in-house
tuning center features a full time tuner, state-of-the-art equipment and
expert technicians. This Supercharged RS4 features APR's Supercharger upgrade and Miltek Exhaust. Check out both Kevin's rides in the
December 2011 issue of Eurotuner Magazine. Visit www.dcperformance.com for
all your performance needs!
2007 Audi RS4 by Edmunds' Inside Line
If the engine is the soul of every car, then the 2007 Audi RS 4 has more
character under its hood than most performance cars possess from tip to
tailpipe. With 4.2 liters of direct-injected aluminum fury, its V8 makes
420 horsepower and
317 pound-feet of torque, and revs to an unbelievable 8,250 rpm.
Now that's some soul. And it's all forward of the front axle....
B7 RS4 APR Supercharged
Shot for North West Performance
Preston's Performance Enthusiasts