Chipping Away At The FWD 2007 Audi A3 2.0T DSG - Tech

Take the supplied ITG cone air filter and clamp the second silicone connector over the end of it. You can now fix this connector to the intake tube and, once positioned properly, the installation will be complete.

Returning again to the dyno, we found the combination of software, exhaust and the new ESA intake gave 193.8whp and 240 lb-ft. However, the ambient temperature was now 90and although the numbers are corrected, this will still affect the results.

That aside, we appeared to have gained some power but lost torque compared to the previous run with software and exhaust alone. Below 3000rpm, we again gained power, showing up to 16hp gains over the Revo run. But again it lost 3-5hp from 3000-5250rpm.

Being a very warm, dry day would definitely affect the power, and insufficient cooling has since been addressed but we feel we're not seeing the best from any of the power-adders. We expected to see more from the software and didn't expect to lose power with the intake and exhaust. Yet despite the losses, the Audi A3 now sounds a whole lot better and the parts look great. With some hard driving under its belt, we would expect to see higher numbers from the car on another day after the ECU has learnt the new parts and the new driving habits.

Diverter Valve
With a relatively fragile diaphragm in the stock diverter valves on early 2.0T engines, companies like Forge Motorsport have experienced a roaring trade in its replacement valves that offer stronger construction for greater reliability.

Fitting requires a lift since you need to get under the car for this procedure. You start by disconnecting the plug to the ECU from the back of the stock diverter valve (DV). Three 5mm allen bolts then hold the DV to the wastegate. These must be removed but access is difficult in the tight space.

The new Forge DV is bolted to a supplied bracket alongside the supplied solenoid. The latter is important because it converts the electric signals from the ECU to mechanical movement in the DV - ie, it opens it on command. Therefore, the solenoid needs vacuum hoses to be connected to it from the top and bottom of the DV. A third vacuum hose then runs to the top of the engine and is joined to the boost line in the intake manifold using the T-piece connector supplied.

Once all the vacuum lines are installed, plug the solenoid into the ECU and mount the bracket under the car. Although this was probably the most complicated procedure of the day, it's straightforward enough if you follow the instructions supplied in the kit and available on the Forge website.

Conclusion
The mods carried out to the 2.0T have all added to the owners enjoyment. The Revo software has given a huge spike of mid-range torque, making it feel really quick. The Techtonics exhaust makes the car sound much better and the Euro Sport intake adds its own voice as well. Even the Forge diverter valve has given the owner more peace of mind. So while we didn't see all the improvements we were hoping for, every part has contributed something and justified its inclusion.

Owner's Opinion
"Immediately after the install, the increase in torque was readily apparent and confidence-inspiring,"the owner of this A3 2.0T reported. "The exhaust isn't loud at all, but emits a low growl when pushed. When at idle or cruising on the highway it's hardly noticeable.

"The fuel consumption has changed somewhat since the modifications. Whereas I used to average around 24mpg, I'm now getting about 22mpg but have to admit this is almost certainly because I push it harder. And since I mostly do city driving with the DSG in Sport mode, this isn't a surprise.

"In summary, it was a good upgrade because fuel economy has barely altered but I've received a dramatic increase in torque.

"In addition to the mechanical parts, I've also added?Eibach coiloversand 19" Five:AD wheels to get the most out of the chassis as well," he said.