# What controls the boost pressure in a turbocharger?

## What controls the boost pressure in a turbocharger?

Ultimately, the boost pressure is determined by the wastegate, which on most factory turbos, is integrated into the exhaust (turbine) housing.

How do you control a boost on a supercharger?

Easy, just turn the variable boost control dial down to the desired level of Boost. Then when you are ready for the higher HP simply turn the dial to MAX or use the SCAMBLE input on a switch to have 2 preset boost levels.

How is boost measured?

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).

### How is supercharger boost calculated?

Calculating Boost Ratio Add the boost pressure desired (5 Psi) for the engine to 14.7 Psi (atmospheric pressure). Divide this answer by 14.7 and this gives the boost pressure ratio. (21.7/14.7=1.476) This is the boost pressure ratio above atmospheric pressure.

• Increased horsepower: adding a supercharger to any engine is a quick solution to boosting power.
• No lag: the supercharger’s biggest advantage over a turbocharger is that it does not have any lag.
• Low RPM boost: good power at low RPM in comparison with turbochargers.

How do you calculate turbo?

The calculation is simple: Divide the absolute outlet pressure that you think you want (14.7 + boost pressure) by the absolute inlet pressure that the Earth says you can have (14.7) and you’ve got your pressure ratio. Limiting yourself to a reasonable number is the hardest part.

## How many types of turbos are there?

6 different types
There are 6 different types of Turbochargers: Twin-Turbo. Dual scroll turbo. Variable geometry turbo. Variable Twin Scroll Turbo.

How is supercharger boost measured?

What increases turbo boost?

Two turbos of different sizes might make the same amount of boost, but one may do the job more efficiently than the other. Fenske noted that an undersized turbo will have to spin faster to make the same amount of boost, heating the air molecules to a higher temperature.

### What is supercharger pressure ratio?

The optimum compression ratio is 8.0:1. Higher than 8.0:1 is not necessary or recommended. Fuel, ignition timing, and total boost could become critical factors.

How do you measure supercharger size?

In terms of sizing, it all comes down to the volume of air that the supercharger can cram into the cylinders of the engine each time the supercharger spins around. The ratings for superchargers are therefore given in L/rev (litres per revolution) or cc/rev (cubic inches per revolution).

Which is better a turbo or a supercharger?

A turbo is more efficient than a supercharger since your engine does not need to work harder to power the turbo. Because a turbo is not connected directly to the engine, it can spin much faster than a supercharger. Source: http s://www.redline360.com/garage/supercharger-vs-turbo-which-is-better-and-whats-the-difference

## What happens if you overboost a supercharger?

The supercharger is limited by it’s efficiency, so if you overboost the supercharger, it will blow hot air into your engine and you will not make as much power (amongst a myriad of other problems). Since the engine needs to literally spin the supercharger, it is not as efficient as you need to use horsepower to make horsepower. What is a turbo?

How does a supercharger work on exhaust gas?

A supercharger doesn’t work off the exhaust gas, it is attached to your engine and spins with the crankshaft. When the crankshaft spins the supercharger, it forces air into the motor. The turbo is more efficient as it doesn’t require engine power to spin it, so it makes more power per boost.

Do Electric superchargers work as advertised?

BorgWarner, the unit’s manufacturer, says the electric supercharger “delivers boost on demand until the turbocharger takes over, improving boost at low engine speeds and nearly eliminating turbo lag.” Having driven this engine extensively, we can confirm that it works as advertised.

Categories: FAQ