Turbo Engine Exhaust System

The turbocharger is bolted to the exhaust manifold of the engine.

Turbo engine exhaust system.

An alternative placement for a turbocharger is to have it rear mounted as part of the exhaust system. The turbine is connected by a shaft to the compressor which is located between the air filter and the intake manifold. The exhaust system is a crucial part of any vehicle. Exhaust backpressure on turbo engines is one of the most misunderstood aspects in tuning to many people but it s pretty simple it s not good.

Given the installed locations of the turbochargers custom formed exhaust pipes are required to route exhaust from the turbos to the remainder of the exhaust system. General rules of thumb are easy to grasp but applying them correctly is where things get tricky. The displacement exhaust valve size induction system cam profile exhaust port design and rpm range all factor into deciding what form the exhaust system should take. The post turbo back pressure dropped from 1 9 psi with the 3 0 inch exhaust to just 0 9 psi with the 3 5 inch system.

This is an example of a twin turbo system fitted to an ls7 engine which increases rear wheel horsepower to 1 000 under full boost. The compressor pressurizes the air going into the pistons. An exhaust system is usually piping used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove the entire system conveys burnt gases from the engine and includes one or more exhaust pipes depending on the overall system design the exhaust gas may flow through one or more of. N a cars utilize exhaust velocity not backpressure in the collector to aid in scavenging other cylinders during the blowdown process.

One of the biggest challenges car owners and enthusiasts face is increasing their engine s performance. The exhaust from the cylinders spins the turbine which works like a gas turbine engine. Fwiw i m an turbocharger development engineer for garrett engine boosting systems. And one way to make an engine more efficient is by upgrading its exhaust system.

On non turbo engines backpressure is a single issue the pressure in the exhaust system but on a turbo engine it s actually two issues pressure in the post turbo exhaust system and pre turbine backpressure in the exhaust manifold. Tuning an exhaust system to a given application is a case by case basis challenge. Turbocharger lag turbo lag is the time required to change power output in response to a throttle change noticed as a hesitation or slowed throttle response when accelerating as compared to a naturally aspirated engine this is due to the time needed for the exhaust system and turbocharger to generate the required boost which can also be referred to as spooling. So intercooler are then used to cool the intake air to the engine from a turbo system.