exhaust performance tips – Trufit Exhaust Blog

A Header Refresher

As you probably recall, engine headers bolt on to the exhaust manifold in your vehicle’s engine. The object of the uniquely profiled back pressure reducers is to give each cylinder its own discharge path, with the channels then blending into a single thick bore tube. When you install a header system, you’re taking the load off the cylinders by endowing them with their own outlet channel, one that then combines attractively with its peers to quickly dismiss all exhaust gases. In appearance, the pipes make your vehicle look like a muscle car, but the performance modification can go even further, just as long as you’re willing to select a top-branded manufacturer.

Pacemaker Headers: Redefining Cylinder Separation Technology

Quality exhaust headers, courtesy of Pacemaker, take this byproduct separation principle to a whole other level. First of all, the mandrel-bent pipes are specifically designed to accelerate the ejection process, so the discrete fume streams rocket out of the pipework before the exhaust back pressure even begins to hamstring engine performance. Next, an innovative engineering company enjoys leading the field, not playing follow the leader, so the Pacemaker team have been busy. They’ve added that mandrel-bent profile to the mix, then brought their engineering acumen deeper into the architecture of the headers to deal a blow to the turbulence that develops when these discrete byproduct streams recombine. The solution is Pipe Over Cone technology, a header profile feature that significantly reduces gaseous turbulence so that the gases move unhindered towards the exhaust tips.

A peek inside the vendor-tuned pipes shows a design that doesn’t place a protruding pipe inside the collector cone. Instead, Pacemaker Headers focus on singular innovative solutions, products that curve while never attenuating the exhaust stream as it travels away from the engine manifold. Add to that the copyrighted pipe over cone feature, a design that draws upon the laws of fluid dynamics, and this product family easily gives any other header vendor a run for its money. Built to inject your next bolt on set of headers with added performance, Pacemaker Headers are also long lasting, designed to fit many popular cars, and a product of a dedicated R&D environment.

Trufit Exhaust
437 Warrigal Road,
Moorabbin, VIC 3189
Australia
Areas serviced: Melbourne
Tel: 03 9555 5688

Injection systems improve engine performance, so why shouldn’t a similar mechanism enhance your exhaust output? Instead of fuel injection, however, the tech we’re about to discuss injects Urea into diesel exhaust streams. Buckle in while we explain what’s known as Selective Catalytic Reduction and Urea injection. It’s a chemical process that’s been used in industrial diesel engines for some time now, and it’s also found in car exhaust systems.

What is Selective Catalytic Reduction (SCR)?

Selective catalytic reduction technology uses an active chemical injectant as an emission mitigation solution. Specifically, the catalytic agent targets the poisonous nitrogen oxide (Nox) fumes in your exhaust, which is why the technology earns the “selective” prefix. Down among the exhaust pipes, a dosing tank is injecting a gaseous reductant into the engine byproduct stream. A redox reaction takes place between the reductant and the nitrogen oxide. Basically, through some invisible chemical process, the noxious gases are transformed into harmless nitrogen and water, elements that can’t harm the environment.

What about the Urea?

Chemists refer to Urea by its technical label, so substitute that short word with a longer chemical name, something chemical engineers call Aqueous Ammonia. That active liquid compound is what’s injected into the exhaust stream, but we less science-centric types simply call the chemical Urea. Anyway, call it Urea or Aqueous Ammonia, it doesn’t really matter. What does matter is what happens when this chemical and the Nox pass through a catalysing agent. Typically formed from ceramic and some exotic metal (Titanium Oxide or Vanadium Oxide), the honeycombed catalyst converts the Nitrogen Oxide into harmless hydrogen dioxide and nitrogen, plus a few trace wisps of Carbon Dioxide (Co2).

Bringing It All Together

You don’t need a chemistry degree to see how this active emission management system operates. The dosing unit passes NH3 (Ammonia) into the catalyst chamber. Those perforated plates, the Titanium Oxide honeycomb, then swaps electrons and elements so that new compounds form. Now, as stated right in our initial passage, the Selective Catalytic Reduction process has been operating in industrial engines for some time, but the system can scale, so performance cars are enjoying emission attenuation figures that hover around the ninety-percent mark. That Nox reduction figure creates a compelling reason to consider SCR technology.

Passive exhaust system solutions work well when stock factory exhaust systems roll off the assembly line. For a performance engine, though, an active emissions management system represents a welcome addition to the performance exhaust system family, one that uses dosing Urea and a special catalyst to really inhibit the Nox gases.

Trufit Exhaust
437 Warrigal Road,
Moorabbin, VIC 3189
Australia
Areas serviced: Melbourne
Tel: 03 9555 5688

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Tag: exhaust performance tips

What are Pacemaker Headers?