How hot should exhaust manifold be?

Manifolds and/or exhaust pipes on some vehicles can reach 1200 degrees F. It is rare to find temperatures this high in normal operation. The hottest locations tend to be those for which there is some constriction or impingement of exhaust gas.

What is acceptable exhaust back pressure?

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.

What temperature do exhaust headers reach?

In short, the highest temperatures that an exhaust manifold or exhaust pipe should ever reach would be approximately 850°C (1,600°F). As a guide, metals will start to turn red at 500°C and be a dark cherry red at around 635°C (1,175°F).

Should I wrap my stainless steel headers?

While you might think ceramic coated headers would provide the best protection against corrosion, Jeff explained, “Ceramic-coated mild steel and even stainless-steel headers can also be affected by corrosion. When done properly, wrapped headers not only reduce underhood temperatures, but will look great, too.

What should the temperature of an exhaust manifold be?

Manifolds and/or exhaust pipes on some vehicles can reach 1200 degrees F. It is rare to find temperatures this high in normal operation. If your laser thermometer can read up to at least that high, you should not have any issues. EDIT: As pointed out by @Zaid below: This would be a very lean condition, but is possible.

How hot does a Buick exhaust manifold get?

This would be a very lean condition, but is possible. I just checked the exhaust manifold of my 1934 Buick with a straight 8 after about a 15 minute drive. The temperature about 4 minutes after shutting of the engine was about 450F degrees, checking with an infrared laser thermometer. It’s about 75 degrees outside.

Which is the best pressure gauge for exhaust manifold?

The model GCM200 is an only pressure gauge in the world to be able to measure the exhaust manifold pressure correctly under very high temperature up to 800C, pressure pulsating violently from -80 to 500kPa, strong vibration from 20 to 50G and the fast response from DC to 5kHz are also desired.

What kind of transducer is used for high temperature exhaust manifold?

The typical pressure transducer applicable for the exhaust manifold pulsating pressure with high temperature is normally the Piezo-Electric one and the GaPO 4 transducer is applied up to 400C without cooling.

When does an exhaust pipe / muffler get hot?

The catalytic converter often reaches a temperature of 750 degrees. However, if you have more unburned gases leaving the combustion chamber or one of the cylinders is not working, you will experience a tremendous increase in temperature. The exhaust pipe muffler temperatures reach their peak when the car is on the road rather than when it’s idle.

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.