What should exhaust back pressure be at idle?
“Backpressure readings at idle on most engines should generally be less than 1.5 psi (10 kPa). This will vary somewhat from one vehicle to another depending on the design of the exhaust system, the size of the pipes, how restrictive the converter, muffler and/or resonator is, and whether it is single or dual exhausts.
What should the back pressure be in an exhaust system?
Mufflers generally result in maximum back pressures in the range of 6 kPa. In exhaust systems with a DPF, the back pressure can rise to significantly higher levels—especially if the filter is heavily loaded with soot.
What should the oil pressure be when the engine is running?
The oil pressure gauge should read somewhere between 25 to 65 PSI while the engine is running. Should it start creeping higher (think 80+ PSI), then you’ve got yourself a problem with high oil pressure. When this happens, it disrupts the ability of your engine to function correctly. What causes high oil pressure? The main culprits include:
Is there a limit to the back pressure of an engine?
All engines have a maximum allowable engine back pressure specified by the engine manufacturer. Operating the engine at excessive back pressure might invalidate the engine warranty.
What happens to NOx when exhaust pressure is increased?
Increased exhaust pressure may also prevent some exhaust gases from leaving the cylinder (especially in naturally aspirated engines), creating an internal exhaust gas recirculation (EGR) responsible for some NOx reduction. Slight NOx reductions reported with some DPF systems, usually limited to 2-3% percent, are possibly explained by this effect.
What’s the minimum back pressure for an exhaust system?
The minimum back pressure (about 2.2 kPa at rated power) was achieved using the OEM supplied exhaust system and the maximum back pressure was achieved by restricting the exhaust system so that the maximum recommended back pressure (about 10 kPa) was achieved at rated power.
The oil pressure gauge should read somewhere between 25 to 65 PSI while the engine is running. Should it start creeping higher (think 80+ PSI), then you’ve got yourself a problem with high oil pressure. When this happens, it disrupts the ability of your engine to function correctly. What causes high oil pressure? The main culprits include:
How does exhaust back pressure affect engine performance?
Engine Exhaust Back Pressure. Abstract: Exhaust system components such as mufflers and exhaust aftertreatment devices are a source of engine exhaust back pressure. Increased back pressure levels can cause increased emissions, increased fuel consumption, and can negatively affect engine performance.
All engines have a maximum allowable engine back pressure specified by the engine manufacturer. Operating the engine at excessive back pressure might invalidate the engine warranty.