Super Street Network

Due to the EU’s Global Data Protection Regulation, our website is currently unavailable to visitors from most European countries. We apologize for this inconvenience and encourage you to visit for the latest on new cars, car reviews and news, concept cars and auto show coverage, awards and much more.MOTORTREND.COM
 |   |   |  2007 Audi A3 - Power Adders - Project A3: Part 6
Subscribe to the Free

2007 Audi A3 - Power Adders - Project A3: Part 6

Our Audi A3 2.0T gains 35hp and 52 lb-ft from Revo software, Euro Sport exhaust plus Neuspeed charge pipes, pulley and P-Flo intake.

Greg Emmerson
Apr 5, 2012
Eurp 1203 01+2007 audi a3+cover Photo 1/35   |   2007 Audi A3 - Power Adders - Project A3: Part 6

We’ve procrastinated long enough; with no more excuses it’s time to add some power products to the 200hp, 207 lb-ft 2.0T FSI 16v turbo engine in our ’07 Audi A3 project car to discover what we can unleash.

Perhaps predictably we chose to start with a software upgrade from Revo Technik, followed by a cat-back exhaust from Euro Sport Accessories before adding a number of parts from Neuspeed. The latter would include its Power Pulley, P-Flo intake, air charge pipe and turbo discharge pipe. The parts would be fitted by both Euro Sport and Supreme Power Parts in Anaheim, CA, and we’d use Euro Sport’s Dynojet 248C 2WD dynamometer for all our testing.

Revo Software
As with the majority of modern turbo engines, the biggest and easiest gains can usually be found by manipulating the manufacturer’s own software. A number of companies are able to rewrite the internal codes, unleashing additional power and torque from within the boost, fuel and timing maps.

Eurp 1203 02+2007 audi a3+controller Photo 2/35   |   2007 Audi A3 - Power Adders - Project A3: Part 6

We previously tested Revo software on a number of cars and have been impressed by the ease of installation, trouble-free running and overall reliability. Therefore, we contacted Gary Cogis, Revo’s General Manager to install the new program into our ECU.

Before we could proceed, however, we needed baseline figures for the engine, so Vic Kazanjian at Euro Sport strapped the car to their very consistent dyno and ran some numbers.

After five runs we were seeing reliable results but discarded the highest and lowest, settling on 188.7hp at the wheels and 203.5 lb-ft. To be honest, these are high, even for the 2.0T that notoriously gives good results. It proved our 85000-mile 2.0T was in good condition. We could also thank the 62˚F ambient temperature and 20% humidity for the strong showing. However, it could make it harder for the tuning equipment to make a difference…

That said, Gary flashed the ECU with stage one software, which took about 30min. We then drove the car for 5-10 miles to help the ECU adapt to the new software. We instantly felt an improvement, particularly in mid-range torque, which helped acceleration and overtaking on the freeway especially.

What’s nice about Revo’s FSI program is it allows the dealer to adjust timing, boost and fuel for a specific car or modifications. This means that we can alter the setting as more parts are fitted, or simply move up to stage 2 if we add a downpipe, or stage 2+ for cars with an uprated fuel pump, etc.

Back on the dyno, the Audi hit 202.6whp and 242.7 lb-ft as an average. And while these numbers are good, they only tell half the story. If you look at the dyno graphs, you’ll see there’s more under the curves. In fact, our best increase was 29.4whp and 44.2 lb-ft at 3500rpm. With noticeable gains throughout the rev range we were very happy with the results.

Euro Sport Exhaust
To remain emissions compliant, we opted to only fit a cat-back exhaust rather than liberating downpipes as well. Euro Sport Accessories had its own range of stainless steel systems in stock, including this one for the Mk5 VW GTI and Audi A3 2.0T.

Eurp 1203 03+2007 audi a3+euro sport exhaust Photo 3/35   |   2007 Audi A3 - Power Adders - Project A3: Part 6

The system replaces the center and rear suitcase mufflers on the stock system with a single muffler. The mandrel-bent, 2.5" diameter exhaust is made from T304 stainless and features polished dual tips. It uses slip-on joints and T-clamps for ease of installation that took less than an hour. It’s also backed by a five-year warranty.

We weighed the new system, which tipped the scales at just 19.5 lb against 35.8 lb for the stock exhaust. This is a respectable saving, and when combined with power, sound and aesthetic improvements, makes it an attractive addition.

Remove the stock system by raising the car and loosening the two 13mm bolts on the center clamp ahead of the muffler. You then drop the pipes from five hangers: two by the clamp, one in front of the rear beam and one of either side of the rear muffler.

Eurp 1203 04+2007 audi a3+muffler Photo 4/35   |   1 To fit the Euro Sport exhaust, slide the new center section with muffler into the stock clamp. Secure the clamp but don’t tighten all the way to allow alignment later. Fit the three hangers into the stock rubbers
Eurp 1203 05+2007 audi a3+rear pipe Photo 5/35   |   2 With a supplied clamp, fit the rear pipe to the center muffler and hang from the rear rubber

Returning to the dyno, we held our breath until the number appeared. To our amazement, we were seeing large gains – something the almost-identical Mk5 GTI can struggle to achieve from a cat-back.

Again taking an average, our numbers had climbed to 211.4whp and 253.7 lb-ft. These are impressive results, especially considering the ambient had risen to 68˚F, which was a slight disadvantage.

Under the curve we had best gains of 14.2whp at 4750rpm and 13.8 lb-ft at 3750rpm, which is practically unheard of from exhaust systems these days. We can only assume that either our stock exhaust was clogged (although the high numbers dispute that), or the A3 has an inefficient design. Either way, we were pleased with the improvement.

Turbo Discharge
Following our success, we headed over to Supreme Power Parts to have the Neuspeed equipment fitted. We intended to fit everything and dyno as a package rather than test individual components. If the claimed gains were accumulative, we were expecting more great results…

Eurp 1203 09+2007 audi a3+turbo discharge Photo 9/35   |   2007 Audi A3 - Power Adders - Project A3: Part 6

We started with the Hi-Flo Turbo Discharge Conversion. It’s designed to replace the stock plastic pipe that fits

between the turbo and intercooler, removing airflow restrictions to reduce turbulence and lag. It also maintains a constant 57mm diameter, rather than the stock part that starts at 38mm and increases to 57mm.

It’s beautifully designed, with a billet adapter, wrinkle-finished aluminum pipe, silicone hose and OE connectors. It fits like factory and equally high quality. And being black, won’t attract attention.

To begin, raise the car and remove the bellypan and passenger-side fender liner for access.

Eurp 1203 10+2007 audi a3+intercooler pipe Photo 10/35   |   1 Start by disconnecting the intercooler hose from the bottom of the discharge pipe by pulling the wire clip up to release. Do the same at the top to release the pipe from the turbo. Then undo three 10mm bolts from the turbo adapter and remove – be careful with the O-ring adapter seal, it can’t be bought separately!

All Neuspeed parts are supplied with hardware and color instructions to show the steps, list tools and highlight any potential hazards.

Eurp 1203 14+2007 audi a3+silicone hose Photo 14/35   |   5 Fix silicone hose to adapter with supplied clamp but don’t tighten fully until the end to allow for alignment

Neuspeed pulley
While you’re under the car, it’s the perfect opportunity to fit a Power Pulley. We did it with the discharge pipe removed to gain extra clearance.

Eurp 1203 18+2007 audi a3+neuspeed pulley Photo 18/35   |   2007 Audi A3 - Power Adders - Project A3: Part 6

The pulley is designed to reduce the parasitic power loss from spinning a heavy pulley on your crank to run the A/C and alternator. It’s made from 6061 T6 hard-anodized aluminum for durability and is supplied with a shorter drive belt. It’s said to offer 5-7hp on its own.

Take care not to hold the pulley or belt in position with pliers or anything that could damage the components. Some models use 6mm stretch bolts that can be soft, so take care when removing.

Eurp 1203 19+2007 audi a3+old vs new pulley Photo 19/35   |   1 Use either a 6mm or 10mm socket as above to break loose the OE bolts. You then need a 16mm wrench to rotate the belt tensioner to remove the drive belt. Now remove all six bolts from the pulley and remove

For cars with these 6mm bolts Neuspeed supplies replacements; unless it came with 10mm bolts, in which case you re-use the originals.

Charge Pipe
The Neuspeed Hi-Flo Air Charge Pipe replaces the stock piece between the intercooler and throttle body. The factory part is kinked and flattened, whereas Neuspeed’s replacement uses a constant diameter aluminum pipe for less restriction and better airflow. It also eliminates the factory sound amplifier on cars fitted with it.

Eurp 1203 23+2007 audi a3+charge pipe Photo 23/35   |   2007 Audi A3 - Power Adders - Project A3: Part 6

Installation is fairly tricky because it sits at the front of the engine bay between the radiator and engine block. Fortunately, there’s more clearance on our Audi than a GTI, but it can be a fiddly process to reach the brackets. Our car didn’t have a sound amplifier, but where fitted this is a more complicated procedure that is covered in Neuspeed’s instructions.

Start by disconnecting the map sensor plug. Then release the wire clip on the hose from the throttle body to the stock charge pipe. At the bottom, the charge pipe is connected to the intercooler hose with a metal clamp. The pipe is secured to the car on brackets that bolt to the engine block at the top with a 6mm nut, and oil pan near the filter with a T30 torx. Once these are undone, wriggle the charge pipe free.

Neuspeed P-Flo
Several companies, including Euro Sport Accessories, offer cold-air intakes for the 2.0T. What’s more, several are cheaper than Neuspeed’s. However, they don’t offer the CARB compliance of the P-Flo, which makes it 50-state legal and has a sticker and paperwork to support it.

Eurp 1203 27+2007 audi a3+p flo kit Photo 27/35   |   2007 Audi A3 - Power Adders - Project A3: Part 6

The P-Flo replaces the large factory air box that sits over the engine, muffling mechanical sound from the fuel pump in particular, while also giving good low-speed response. However, it creates a restriction at higher engine speeds, limiting output. A cold-air intake (CAI) removes that restriction, possibly at the expense of some low-speed torque, and allows you to hear the induction noise. While it sounds great, it can be a problem since it also introduces blow-off noise that might attract police attention, which is where the CARB compliance comes in handy…

Removing the stock air box exposes the top of the engine, again making it hard to hide its presence, but also necessitating an engine cover such as Neuspeed’s carbon fiber part if you wish to dress it up.

The intake kit is supplied with a heat shield for the exhaust, as well as a washable K&N filter. The large-diameter pipe helps airflow and houses the MAF sensor. The pipe is available with either a black or red wrinkle-finish as well as the fitting hardware.

Start by removing the stock airbox. To do this, first disconnect the air intake duct at the front of the engine bay. It unscrews from the front panel and then unclamps from the engine cover. Then disconnect the mass air flow (MAF) sensor and remove the screws to release the sensor from its housing. Now disconnect the turbo intake hose from the back of the cover. You then lift the cover from each corner to release the rubber grommets. These can be stubborn so take your time but apply force.

Remove the air intake hose from the top of the turbo by squeezing the spring clamp. Take care not to let anything fall into the turbo!

Final Results
With everything in place we drove to the Euro Sport dyno and our 2.0T felt great. You get pronounced induction noise and can hear the blow-off valve operating. There’s also a rather annoying screech at full-throttle as the air whistles through the tubes but you can avoid it by closing the throttle slightly.

Thanks to this induction noise and the moderately louder exhaust, Project A3 was finally sounding like it looked. So it just remained to see what numbers we’d get on the dyno.

We again conducted five dyno pulls. Since it was the following morning, the ambient temperature was back to 62˚F, so we had high hopes.

After more consistent runs, our average numbers were 215.2whp and 256.1 lb-ft, which were relatively modest gains at peak. We also noticed a slightly loss of torque from 2500-3500rpm. Beyond that, the engine started to breathe better, seeing a considerable peak increase of 13.3whp and 11.3 lb-ft at 6250rpm compared to the software and exhaust.

And while the low-speed pick up is mildly compromised, the top-end improvement actually gives us a really nice curve that manages to sustain the mid-range increases from the software and exhaust further into the power band. So we’re still gaining power up to 7000rpm where Vic would lift-off.

Comparing stock to the final results, we saw a best increase of 35whp and 52 lb-ft at 3500rpm. As you’d expect, the car feels very strong on the road, revving hard and clean all the way through the power band. But it’s the mid-range shove that’s addicting. We’re certainly happy with the results that exceeded our expectations given our previous experience with the 2.0T FSI.

Eurp 1203 34+2007 audi a3+hp dyno Photo 34/35   |   Although stock power (blue) was higher than expected, every mod showed an increase, particularly the Revo software (red) and Euro Sport exhaust (green). The Neuspeed induction pieces (purple) are also worth adding if only to gain more top-end power to balance the big mid-range gains
Eurp 1203 35+2007 audi a3+torque dyno Photo 35/35   |   The torque curve is even more impressive than power, with a huge increase from the software over stock from about 3000-4500rpm. This feels more impressive on the road, where the car accelerates quickly. The exhaust continues the trend, adding more lb-ft throughout the range, while the Neuspeed pieces do lose slightly at low engine speed but pick up as the revs climb

Modifications to date
Ultra-low coiloversH&R Springs 6/11
19x8.5” Nurburgring wheelsTSW Wheels 6/11
Wheel stud kit Raven Motorsport 6/11
235/35 R19 ExtremeContact DWContinental Tires6/11
JOM S3-style grilleBlack Forest Industries 7/11
RS3 interior trimOEMplus8/11
Paint restoration and wax Meguiar’s 11/11
Fiscon Bluetooth module OEMplus 2/12
Taller rear springsH&R Springs 2/12
225/35 R19 ExtremeContact DWContinental Tires 2/12
engine softwareRevo Technick 3/12
cat-back exhaustEuro Sport Accessories 3/12
Air Charge PipeNeuspeed3/12
P-Flo Intake KitNeuspeed3/12
Turbo Discharge Kit Neuspeed 3/12
Power PulleyNeuspeed3/12


Camarill, CA 93012
Euro Sport Accessories
Anaheim, CA 92806
Revo Technik USA
Buford, GA 30518
Placentia, CA 92870
By Greg Emmerson
1078 Articles



For years Honda/Acura owners have been using chassis codes to refer to their cars, but because chassis codes can vary based on a number of factors, there's a good chance that they've been using the wrong labels
Aaron BonkJul 27, 2020
Eventuri has been a favorite among the most elite and highest-performing European sports cars out there. We see if the hype behind them is real using Sam's Supra.
Sam DuJul 23, 2020
A blowoff valve is designed to protect the turbo against damage. They just happen to make a loud sound while doing it! But the noise they make shouldn't be what you're most concerned about
Evan GriffeyJul 16, 2020
Tires are the most important investment you can make when it comes to your safety and car's performance. There's a lot of factors that go into choosing the right tire, some of which may matter to you more than others
Sam DuJul 13, 2020
At its most basic level, porting the intake and exhaust ports on a rotary engine is the same as porting the cylinder head(s) on a piston engine, in that the objective is to improve airflow in and out of the combustion chambers.
David PratteJul 9, 2020
Sponsored Links