How do I choose the right size turbo?

Most of the time, the size of the turbine depends on its wheel’s exducer diameter, or the part of the wheel air passes over last. A larger bore in the housing will typically yield more power. Sort of. The trick is keeping the turbine wheel’s diameter within 15 percent of the compressor wheel’s, give or take.

How do I choose a turbo for my engine?

In order to decide on the appropriate turbocharger for your diesel engine, the very first thing that needs to be established is the power target. Since turbochargers are sized by how much air they can deliver and airflow is proportional to engine power, a realistic horsepower goal is critical to make the right choice.

How much horsepower can you get from a single turbo?

With a single turbo, you can increase the power to 1500 HP and more by acquiring larger setups.

How big is a GT45 turbo?

The best price we found for the GT45 clone on the day we searched was from DNA on eBay. A little research time spent behind the old keyboard goes a long way! See all 21 photos On the exhaust side, the turbo included an 88mm inducer, a 77.5mm exducer, and 1.05 A/R.

What is turbo a R ratio?

Aspect Ratio (AR) is commonly used to indicate a turbocharger housing size. The Aspect Ratio (AR) is the ratio of the area of the exhaust turbine inlet to the radius from the turbine impeller center. The AR ratio should remain the same as the Volute gets smaller as it gets closer to the impeller.

Can you put a turbo on a stock engine?

Yes, but it’s usually a very bad idea. Here’s why: The stock compression ratio and cooling system is wrong for a turbo. You’ll need to change the engine management system and at least some of the sensors.

How much HP will a twin turbo add?

And, of course! Thanks to the twin turbochargers on that 3.7 liter V6, this all adds up to 650hp to the wheels.

Is it possible to twin turbo a 4 cylinder?

For four-cylinder engines and straight-six engines, both turbochargers can be mounted to a single exhaust manifold. The aim of using parallel twin-turbos is to reduce turbo lag by being able to use smaller turbochargers than if a single turbocharger was used for the engine.

How much boost does a GT45 make?

The GT45-style was capable of supporting in excess of 800 horsepower. Equipped with the CX Racing 76-mm, the 4.8L produced 573 hp and 523 lb-ft of torque at a peak boost of 5.4-psi. Despite the wastegate setting of 7-psi., boost supplied by the CX Racing turbo peaked at just 6.5-psi.

Should I Go small or large for my Turbo?

Go to small and you bottleneck the exhaust and loose power. The turbo A/R size will be the same. If you go to large for your size motor the turbo will be lazy and slow reacting. Go to small and the turbo will be choked up in the upper RPM powerband. Now for the hard part.

How do I choose the best performance turbocharger?

Choosing a performance turbocharger starts with a horsepower target. Each turbocharger is designed to support a specific range of horsepower and engine displacement. If a turbo is too large for your engine, you will have a lot of turbo lag, and if a turbo is too small for your engine you may not reach your horsepower target.

What size turbo do I need to make 650 hp?

Now let’s do the same scenario with a large turbo.   The owner has the same goal of 650hp, but chooses to go with a larger turbo like a Garrett GTX40/88r or 6766 or Borg Warner S366.   These turbo’s are all rated at 80+ lbs/min of airflow and will flow enough to make 800+ wheel HP.

How much does it cost to put a turbo on?

The turbo might only cost you $500, but a good install doesn’t stop there. Turbochargers make power as a function of the engine’s original horsepower and torque, so building an engine to make more power before bolting the turbo onto it will likely yield benefits that compensating with huge boost won’t.