exhaust back pressure testing
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Great video, good work thanks.
malkooth 3 months ago
quick question here.... I have a four cylinder car that has a catalyst problem... for example my car will stall at times and will run just fine at other times. can a system have not enough pressure and make my car do this??? I dont have any tools to check the back pressure but compared the exhaust flow from the tail pipe to another vehicle. the exhaust on my car with problems was letting alot of air push through while the other vehicle that runs correctly had half as much airflow. what u think
fmartinez2580 9 months ago
@2009jimmy2009 losing performance due to an exhaust leak generally is caused by uneven back pressure,so to say basically the amount of force a piston must over come needs to be equal,on the intake stroke (piston coming down) all cylinders have the same"force" to fight against due to the intake manifold having a balanced system of runners,and if you have a exhaust leak on one side of a V type engine you can have 3 cyls that move freely but the other bank is fighting more restriction=no power
MrJsowa 9 months ago
@sammyhale22
You also have people who put on aftermarket exhausts on their cars and LOSE backpressure, causing them to be gutless.
ac8402007 1 year ago
can someone explain how a car losses power once manifold is removed, or a major leak close to the manifold. even in a car with no 02 sensors???
2009jimmy2009 1 year ago
Back pressure, particularly high back pressure kills exhaust gas flow(too many mufflers, catalytic converters), the speed that exhaust gases can exit an exhaust system are crucial. A race car system is straight through.
A good example of improving performance from reducing back pressure is removing a catalytic converter, this causes an increase in bhp and torque.
sammyhale22 2 years ago
Back pressure requirements are different for various displacements when it comes to performance. With smaller engines 1.8 and under back pressure is important. However engines with displacements including and exceeding 1998cc the name of the game is to reduce back pressure...especially in N/A engines, turbo charged engines are a different story.
sammyhale22 2 years ago