40 psi

Either charger can hold up to 30-35 psi of boost for a while, but 40 psi or more is asking a lot for a turbo that was originally intended to see a maximum of 17 to 23 psi.

With stock internals you can measure the life of your engine in seconds if you go over 10 lbs. of boost. If you don’t have the resources to keep putting motors in then stick to 5 lbs, especially if it is your daily driver.

6 to 8 pounds per square inch

From 1-2,400 rpm, the primary turbocharger is activated; at 2,400-2,800 rpm, the second turbocharger is activated; and beyond 2,800 rpm, both turbochargers function. This system is recommended for diesel engines with displacements of 2.0 liters and above, and V engines.

Yes, the turbo spins at idle. Any time the engine is running, exhaust is flowing through the turbo and spinning the wheels.

You won’t get the turbo to spool at idle. Wheels will spin, but not enough to build boost. You need load which requires more fuel and air, which creates more exhaust volume that will turn the wheels to create boost.

The turbocharger doesn’t boost the engine all the time. If you’re driving moderately, the air drawn in at atmospheric pressure is enough, and the engine operates like it’s naturally-aspirated. When you hit the throttle, the engine works harder and creates more exhaust pressure.

Turbos are much more complex than “naturally-aspirated” engines, and require special treatment to keep them performing at their best. Regular maintenance and changes to your driving style are what’s needed to get the most from a turbo engine, and to avoid nasty repair bills.

Can you drive with blown turbo? The longer you drive your car with a blown turbo, the more damage the engine will have and therefore the more costly it will be to repair. The longer the blown turbo is left without repair, the more damage can be caused to the car’s engine.

The two major advantages of a turbocharged engine are greater power density and increased fuel efficiency….Cons:

• Fuel economy can tank when driven aggressively.
• May require premium fuel.
• Can inflate repair costs.

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.

Which Is Better: Turbo- or Supercharger? Each can be used to increase power, fuel economy, or both, and each has pros and cons. But superchargers can provide their boost almost instantly, whereas turbochargers typically suffer some response lag while the exhaust pressure required to spin the turbine builds.

Turbochargers take longer to spool up, but superchargers are a bigger parasitic drain on the engine. Luckily, there are a few engines out there that have both turbocharging and supercharging. This is called a twin-charged engine and they’re actually quite rare.

Twin-scroll turbochargers offer higher levels of gas-flow efficiency, reduced turbo-lag and allow engines to be tuned for slightly more power than the single-scroll variety. Even the BMW inline-6s no longer need a pair of turbos, relying instead on a single twin-scroll system.

Because the turbocharger forces more air and fuel into the combustion chamber quicker than gravity would, the engine fires faster and more powerfully. Because of this, vehicles with turbocharged engines often produce high horsepower and their drivers enjoy quick acceleration and plenty of speed.

Todays Most Popular Turbos – Go Big

• HKS GT II 7460.
• Source: motovicity.com.
• Garrett GTX2860R and GTX3067R.
• Source: turbobygarrett.com.
• Turbonetics GT-K.
• Source: turboneticsinc.com.
• Godspeed Upgrade turbo.
• Source: godspeedproject.com.

Hanging a turbo on a small engine allows a little engine to breathe big. With only 6 to 8 pounds of boost pressure, a turbo can increase power output 15 to 25 percent or more over a naturally aspirated engine.

Twin Turbo: Sequential Twin Turbo Engines The smaller turbocharger is used for lower engine speeds, and the larger turbocharger is used for higher engine speeds. At low RPM rates, the smaller turbo will spool until enough pressure has accumulated to activate the second, larger turbo.

If you have installed a lot of performance parts like cold air intake, exhaust and turbo – then tuning your car will definitely gain you a lot of horsepower. To give a ballpark figure – if you are on a stock car, you could probably gain 10-15 horsepower from a dyno tune.

Upgrading the fuel pump and injectors to higher-flow units will allow you to compensate for the turbo’s increased airflow via tuning, maximizing horsepower and reliability. Some stock engines are able to reliably make 100 or more horsepower when turbocharged on the stock internals.