What is acceptable exhaust back pressure?
How Much Exhaust Backpressure is Too Much? Backpressure readings at idle on most engines should generally be less than 1.5 psi (10 kPa). We’ve seen some idle readings as high as 2.75 psi on a few vehicles, but for most 1.5 psi or less at idle is normal.
How do I calculate back pressure on my exhaust?
Back Pressure = Atmospheric Pressure + Pressure Drop. Mind that You are doing it for a particular rpm of the engine. Usually done at Max Power rpm and Max Torque rpm.
What should 7.3 exhaust back pressure be?
Exhaust back pressure should not exceed thirty four psi.
How much exhaust back pressure is too much?
For most of its engines, GM recommends no more than 8.62 kPa (1.25 psi) at idle, and no more than 20.68 kPa (3 psi) at 2,000 rpm.
Is exhaust back pressure good or bad?
Back pressure is harmful for the engine and it is a problem that needs to be remedied as soon as possible. The symptoms of exhaust back pressure include reduced engine power, poor fuel economy, slipping transmission in the case of automatic cars, altered shift points, among others.
Does a 7.3 need back pressure?
The 7.3L Power Stroke is equipped with an Exhaust Back Pressure Valve between the turbocharger outlet and the exhaust downpipe that assists with cold start up. Because this control valve is located directly in the exhaust path, it is susceptible to soot buildup which can cause the valve to stick open or closed.
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.
What causes too much back pressure in an exhaust pipe?
And if the exhaust pipe diameter is too small and it generates too much back pressure, these exhaust gases will be heavily restricted from exiting the engine. The amount of generated exhaust gases will be greater than the amount of exhaust gases that are able to leave the engine.
What does the back pressure on an engine mean?
The term refers to the atmosphere which pushes down on your exhaust system. And back pressure generally has a very negative effect on your engine’s power output. When your engine works at the top of its power band, it creates a lot of spent exhaust gases.
What should the backpressure be at idle on a car?
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. We’ve seen some idle readings as high as 2.75 psi on a few vehicles, but for most 1.5 psi or less at idle is normal.”