Visit Parley’s Diesel Performance for all your diesel performance parts needs.
As with building up any vehicle for power, Volkswagen TDI performance starts with making the basic modifications first. The VW TDI will get its biggest two gains out of a TDI performance chip or module and out of upgraded injectors. Your average chip or module upgrade will give about a 20% power increase. A tdi injector upgrade usually yields about a 20% gain as well. If the right combination of TDI chip/module and injectors are used, even more will be gained, i.e. (Van Aaken Smartbox & Van Aaken Smart Power Nozzles). Those are the most basic VW TDI performance upgrades.
Another basic VW TDI performance modification is the TDI performance exhaust. If you are going to increase fueling you will in turn increase EGT’s (exhaust gas temperatures). So to keep temperatures lower and to help increase performance of the VW TDI even more, one of two things can be done; first, a mufflerectomy can be performed, in which the muffler and resonator are removed and a straight pipe is put in their place. This opens things up a little and removes the baffling of the muffler so that the exhaust can flow more freely. The second TDI exhaust option is the Aero Exhaust turbine muffler. The inner design of Aero Exhaust’s performance muffler works the same as a jet engine to increase the flow of exhaust even more than what a mufflerectomy does. The inner design splits the air via an air foil. The faster air moves through the center and the slower air moves around the outside of the air foil, the slower moving air then re-enters the main air stream through inlets that go down the sides of the mufflers inner cylinder. This recombining creates a vortex that lowers the tone of the exhaust and dramatically reduces back pressure by increasing the flow of all the exhaust that moves through it.
Increasing air flow into the engine will help more of the fuel to be combusted and to help extract more power out of each molecule of fuel. Most diesel cold air intakes have a large cone air filter that is able to move up to 300% more air than the stock air intake system. This makes the cold air intake an important part of any VW TDI performance package, sadly though, cold air intakes are not currently made for all the vw tdi models. Another modification that helps with air intake and exhaust is water methanol injection. Water methanol injection is also known as chemical intercooling. It has a three fold effect on the diesel engine. First, it cools the intake charge which provides for more available air intake and the benefits of a higher positive pressure ratio (more power giving fuel can be utilized safely without high combustion temperatures). Two, the combustion of water also adds power. Third, methanol is also a high octane fuel that adds more power. Water methanol injection typically lowers EGT’s by about 200 to 250 degrees on bigger diesels and is slightly under that for the VW TDI.
So in conclusion, to be able to build a real beast, the modifications must be made from the ground up. After these mods are made then a bigger turbo and intercooler could be added as well as upgrading the clutch and other components to help hold the added power.
The TDI Chip and TDI Exhaust are the beginning of any VW TDI Performance upgrade. – Nathan Young
Visit Parleys Diesel Performance for all your diesel performance part needs.
A lot of people are wondering what makes the Aero Turbine Muffler so special and what sets it apart from other performance mufflers on the market. Aero Exhaust was good enough to provide this cutout so that we could show our clients what the internals of these revolutionary mufflers look like.
The Aero Turbine Muffler is based on jet engine and thermaldynamic technology. The incoming exhaust airstream is rapidly expanded and split via an airfoil cone with an orifice similar to a jet engine. The outer airstream accelerates as it recombines with the inner airstream. The air then begins to spin, due to the velocity and air transfers. The recombining of the airstreams creates a vacuum that both muffles the exhaust sound and increases the exhaust flow. This allows your engine to breath easier and dramatically increases your vehicles performance and economy.
For several years now Aero Exhaust has been taking the diesel performance muffler market by storm. The deep throaty sound, lower EGT’s and improved mileage gains that the Aero Turbine Muffler provides has driven the Aero Turbine Muffler straight to the top of the performance muffler market. For those of you that aren’t really familiar, Aero Exhaust offers performance mufflers for both gas and diesel applications starting at 2.5″, and going all the way up to 5″ with both resonated and non resonated models. With our diesel clients, there have been several models that have been popular just depending on the application. Visit Parley’s Diesel Performance to shop for your performance muffler today.
For our clients who are into TDI Performance, the Aero Turbine 2525XL has been the most popular model by far. Our tests on the dyno have shown that on a 2002 VW Golf TDI we were able to gain 10hp, we also noticed a considerable decrease in turbo lag and an increase in mileage while still maintaining stock noise levels in the cab.
When it comes to performance for the Big Three — Ford, Dodge, and Chevy we recently got some great news from Aero Exhaust anouncing that they are releasing full turbo back exhaust systems which would come with the Aero Turbine Muffler in line. We actually had a chance to get our hands on one of the prototype 5″ turbo back exhaust systems for our 2005 Dodge Cummins project vehicle. We have been really impressed with the quality of the system all around, as well as the performance gains we have seen from it.
If you want to hear it for yourself you can check out the video below.