Sonu Atwal had been a long-time 034Motorsport customer when he picked up his latest project, a B5 Audi S4 Sedan that had been modified by the previous owner. The car already came with another company’s full RS4 K04 turbocharger upgrade kit and tuning, as well as full downpipes and exhaust. Despite the existing modifications, he wasn’t satisfied with how his new ride was performing.

At first, Sonu’s plans were simple: install a water-methanol injection kit, and have us calibrate it on our dyno. Even with the newly installed WMI kit, his car wasn’t making the power that it could be. The lack of power and other issues with the S4’s idle and part-throttle driveability sent him looking for other options. Sonu was already familiar with 034Motorsport’s tuning prowess, as we had spent some time tuning his 034EFI Stage IIc equipped big turbo B5 Audi A4 1.8TQM a while back. Convinced that our tuning could get his S4’s performance to his expectations with the current hardware, Sonu considered getting another 034EFI Stage IIc Standalone ECU for his new toy, but we offered to optimize the tuning on the stock ECU. We both agreed this would be a great option for the project.

Luckily for him, we had been tuning factory Motronic ECUs for years, and his car was the perfect candidate for our ME7.1chip tuning. With only a few minor changes, including our 85mm billet MAF housing, silicone RS4 MAF hose, 3 BAR fuel pressure regulator, and larger 630cc injectors, we were ready to start the tuning process. We also added our Bosch 044 drop-in fuel pump upgrade for safe measure, to ensure that no drops in fuel pressure would occur and cause the engine to run lean.

After a few hours on the dyno, Sonu’s car was tuned to perfection. In addition to having a butter-smooth idle and perfect driveability, our tuning also picked up over 100 ft-lbs of torque and 78 horsepower at the wheels! Sonu was ecstatic with the results, and couldn’t wait to drive his reborn S4.

This B5 Audi S4 is the perfect German sports-sedan, comfortably delivering 500 horsepower of driving bliss with uncompromised driveability and reliabilty. Keep an eye out for Sonu and his S4 in the greater Bay Area… You probably won’t see anything except for a silver blur unless he’s stuck in traffic or stopped at a red light, but if you’re lucky enough to keep up, you’ll be able to recognize him by his permantent horsepower-induced grin and full-034Motorsport shwag.

This vehicle features the following parts from 034Motorsport:

Last week, we were given the opportunity to put our hands all over Audizine founder Anthony Marino’s beautiful UrS6 Avant.

This was really a special project for us, being that Anthony has had his UrS6 serviced here for years, and he’s always managed to leave without copious amounts of added horsepowers. Despite our constant sales-pitches, and relentless nagging, (usually heckling him while he was waiting in our lobby for us to finish routine maintenance on his car) Anthony’s car would depart time after time with a completely stock motor.

For those of you who aren’t familiar with our origins, 034Motorsport’s history is deeply rooted in tinkering with Audi inline 5 cylinder engines, predominantly the formidable AAN I5 20VT found in the UrS4/S6. What started out as Javad’s personal project car – countless hours of work filled with blood, sweat, and tears – grew in a matter of years to become 034Motorsport, one of the leading Audi tuners in the world, specializing in the inline 5 cylinder.

Something didn’t make sense. This was Anthony Marino, founder of Audizine, and driver of what is the cleanest UrS6 Avant we had ever seen. We were 034Motorsport, home of the highest horsepower AAN 5 cylinder engine on this side of the planet. At first glance, it seemed that the sun, the moon, and the stars had aligned, and fate had brought us both to the SF Bay Area. But his UrS6 remained stock as far as power was concerned, with the exception of an unknown chip-tune…

Month after month, Anthony would swing by without giving in to any of our horsepower-filled goods. We began plotting… How can we get him into a bigger turbo? Should we bribe him? Drug him? Skip straight to torture? Luckily, we didn’t have to resort to any of those things.

Very recently, Anthony came to his senses, and the modding began. To be precise, it started with our 3″ turboback exhaust system. We had to custom-fabricate the exhaust on his car, as our standard UrS4/S6 exhaust would be too long for his shorter Euro rear bumper. With the AAN’s newly unleashed exhaust sound emanating from his car, Anthony soon decided that some more power was in order.

After some deliberation, Anthony decided on our K26/GT3071R Turbo Upgrade Kit, and our 034EFI Stage 1 Chip Tuning & Fueling Package for the K26/GT3071R. We also added our Bosch 044 Drop-In Fuel Pump Upgrade to the list for good measure, as the new turbo would require more fuel than the stock pump could deliver.

Anthony’s UrS6 Avant spent the week with us at the 034Motorsport Automotive Luxury Resort, here in Fremont, CA.

When the car arrived, we promptly did a baseline dyno, and realized that it was running dangerously lean, seeing 15:1 AFRs under load, and making about 220WHP. Upon removal of the ECU, we discovered something along the lines of “Billy-Joe’s Country-Fried Awwwwwdeeee Terbow Chip” scribbled onto the ECU in Sharpie… That explained quite a bit.

Once the new parts were bolted on, we strapped the car back down on our Land and Sea AWD Dynamometer. We started with our off-the-shelf 034EFI Stage 1 K26/GT3071R Chip Tune, which we fine-tuned real-time on the dyno to be tailored specifically to Anthony’s setup. The car ended up making a whopping 369.4 horsepower and 359.2 ft-lbs of torque at all four wheels, all on a safe, reliable tune.

Overall, we’re very pleased with how the car turned out. The new 034Motorsport hardware and tuning perfectly complement the exceptional condition that Anthony’s car is in. There’s still plenty of headroom left for more power with the addition of more parts, too, so stay tuned for updates!

UrS6 Avant – AAN I5 20VT

Enough with the blabber, here’s the dyno chart:

In all the excitement of working on Anthony’s Avant, we totally forgot to take pictures of the car… We went out for a quick 10 minute photo shoot (our camera’s battery died) earlier today when Anthony was on his way to pick up the car. Here are a few of the shots we got:

A huge thanks to Anthony for letting us take care of his car! Hope you’re having fun with it!