What is normal exhaust back pressure?
Most stock exhaust systems will show backpressure readings from 4 to 8 psi (27 to 55 kPa), or even higher. As before, if the backpressure reading is unusually high or it continues to climb at a steady rpm, it usually means there is an abnormal restriction causing an unhealthy increase in backpressure.
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.
Do Turbos need back pressure?
On a turbo car, the heat of the spent combustion gas along with the exhaust gas back pressure in the exhaust manifold are responsible for spinning the turbine. So you need back pressure in the exhaust manifold. Where you want to minimize back pressure is in the exhaust after the turbine (from the DP’s on to the tips).
Does Turbo need back pressure?
Will running no muffler hurt my engine?
The straight forward answer to this question is, No, it doesn’t hurt your car to omit muffler out of the equation. In fact, most of the race cars operate without a muffler.
Why do Turbos need back pressure?
On a turbo car, the heat of the spent combustion gas along with the exhaust gas back pressure in the exhaust manifold are responsible for spinning the turbine. So you need back pressure in the exhaust manifold.
How much does turbo back pressure cost?
The optimum backpressure-to-boost ratio is 1:1; meaning for every 1 psi of backpressure in the turbine there is 1 psi of engine manifold pressure. The number you don’t want to see on a back-pressure datalog is 2:1 (2 psi of backpressure for every 1 psi of boost).