Does turbo spin at idle?

The turbo are always spinning when the engine is running, and will even spin down for for up to a couple of minutes after you shut the engine off.

Does a turbo spin all the time?

It will always spin while exhaust gas is flowing (which it always will be if the engine is running). However, it wont be spinning very quickly at low throttle openings (regardless of engine RPM) so the pressure in the in-take manifold wont be very high.

How fast does a turbo spin at idle?

While engines usually have an rpm limit of 5,000 - 7,000 rpm, turbos spin at up to 150,000 rpm!

Do turbos make boost at idle?

In summary, turbocharger operates by having two turbines connected to the same rotating axis. One turbine is spun by the exhaust gases, which cause the other turbine to spin. The second one is what forces the air into the intake of the engine. At idle rpm, there's barely any exhaust to produce boost.

How much RPM does a turbo spin at?

In order to achieve this boost, the turbocharger uses the exhaust flow from the engine to spin a turbine, which in turn spins an air pump. The turbine in the turbocharger spins at speeds of up to 150,000 rotations per minute (rpm) -- that's about 30 times faster than most car engines can go.

Does my rear turbo spin at idle

When should the turbo starts producing boost?

A decent turbo hits full boost at 3k rpm, but it varies depending on the mechanical efficiency of the turbo and how much exhaust is being put out.

Why is boost negative at idle?

When the engine is running, it's sucking air from the intake manifold, causing a negative pressure. The difference is that under a load demand, the turbo can push more air into the manifold causing the pressure to cross over 0 to be a positive number, which is "under boost".

What does turbo spooling mean?

It's all about spooling the turbos. "Spooling" means getting the turbine and compressor wheel spinning fast enough to build the desired level of boost in the intake tract for the launch.

What makes a turbo spool?

Turbochargers are powered by exhaust gases. One side of the turbo captures some of the exhaust gases (the rest get sent towards the exhaust system), which are used to spool a turbine. This exhaust turbine is connected to an intake turbine. So, when the former spins, so does the latter.

How long should you idle a turbo car?

In turn, doing this for a sustained period means one will end up damaging the turbocharger, with the heat getting onto other components. To prevent this, most manufacturers recommend that at start-up, you idle the car for at least two minutes.

How long should you let a turbo car warm up?

If you don't have an oil temperature gauge, a good time is usually a few minutes after your car has reached normal operating temperatures. This usually takes 5-10 minutes but depends on oil type and environmental conditions. Your turbo requires clean and healthy oil for maximum lubrication.

How do you know if your turbo kicks in?

Press gas pedal, exhaust is generated, turbo starts to spin, more air and fuel is pushed into the engine, power increases. This starts to happen right off idle and you can feel it when starting from a stop. Press the pedal and a second or two later you feel the turbo kick in.

How do I know if my turbo is working?

Can you hear a turbo spool?

Turbo spool noise is normal. You'll hear it even more if you go full catless. You won't reach boost target, or will feel loss of power if it's the charge pipes.

What does turbo spooling sound like?

As the name suggests, a turbo whistle sounds like a high pitched whistle or whining sound, heard when the turbocharger kicks in as you accelerate and the revs go up. For some people, a turbo whistle can be annoying, but to others, it's actually desirable!

Do diesels make boost at idle?

Premium Member

The diesel has NO boost at idle. The boost does build up when you work the engine-- at very light throttle and cruising on the highway, you may show no boost, until you add RPM and load the engine. The regular boost numbers for a stock truck is about 25 lbs.

What does a boost gauge read?

A boost gauge will measure pressure in either psi or bar; many also measure manifold vacuum pressure in inches of mercury (in. Hg) or mm of mercury (mm Hg).

What does turbo lag look like?

What does turbo lag feel like? If you put your foot down on the accelerator of a turbocharged vehicle, you may experience a noticeable gap before your car begins to accelerate quickly. When the turbo kicks in, you'll feel a significant jump in acceleration.

Does cold weather affect turbo boost?

As air temperature increases the density of the air, and the amount of oxygen it holds, decreases. This means that the turbocharger has to work harder, spin faster and compress more air to produce the same amount of boost it would at lower temperatures.

What should you not do with a turbo engine?

Can turbo spin backwards?

There is a common belief that compressor surge can cause the turbo to “stall” (i.e. stop spinning), or even spin backwards. It's worth clearing the air and saying that this is incorrect – the turbo will never stop dead or reverse direction because of compressor surge.