Quick Answer

Your Question Are compound turbos worth it?

The primary benefits of compound systems are great low-end torque, strong mid-range and exceptional top-end performance. This is because a small (high-pressure) turbo is utilized to get things started at lower rpm, while a larger (atmosphere, or low-pressure) unit takes over at higher rpm.

How much horsepower does compound turbos add?

The engine displacements are all very close, the factory turbos are all very close in size. So when we put just our base compound system on we generally see an 18-23% improvement in EGT’s and MPG’s – and the harder you run the truck, the higher the those improvement numbers rise.”

How much HP can a stock 12v Cummins handle?

The forged-steel connecting rods found in the 12-valve 5.9L (and ‘98.5-’02 24-valve engines) are of an I-beam design and capable of easily handling 800 rwhp in stock form.

How do compound turbos work Cummins?

Compound Turbochargers Explained

Do compound turbos need intercoolers?

A compound turbo system makes big boost and keeps both turbos in an efficient zone on the compressor map eliminating the use of intercoolers in this setup. Remember, efficient air is cooler air. The high-pressure turbo is a GTX4202R and the low-pressure turbo is a GTX5533R Gen II.

Is compound turbo better than single?

A properly engineered Compound/Twin Turbo Kit, will translate into much more horsepower, much lower EGT’s, better fuel mileage, a much broader RPM range (quick spool up, with huge high end WOT potential), and, overall, a much more drivable, high performance truck.

Do compound turbos spool faster?

compound turbos will spool up faster than a single turbo because you have so much airflow thru them even when they are spinning slow.

Can you tow with compound turbos?

The compound turbo system from Deviant Race Parts (DRP) of Hayden, Idaho, is one such system and we’ll show it to you here. This system can turn the average run of the mill truck into a trailer-towing monster with plenty of air to support 700+ horsepower.

How do you size a compound turbo?


What year 12v Cummins is best?

Among its strong suits are

  • P7100 (The Holy Grail) While the 12-valve was built from 1989 to 1998, most people look for the 1994-98 model.
  • Affordable Injector Upgrades.
  • Simple Designs.
  • HX35:
  • Free Horsepower.

How fast is a stock 12 valve Cummins?

Registered. Mine is about 120 mph.

How much is a 12v Cummins worth?

How Much Does A 12V Cummins Swap Cost? Diesel Cummins conversions can vary widely, often reaching $5,000-$10,500 each. When you choose a vehicle to replace, how you select it, and how long it will take, its price will differ.

Will compound turbo lower EGTS?

Yes a larger single is not ideal for towing. A smaller turbo would spool faster then compounded with a larger charger in a twin set up will get you a end result of quick spool and lots of air.

How do you choose a turbo for a compound setup?

An easy way is to determine the amount of power you’re wanting to create, then look at compressor maps for different primary turbos. Usually we can make around 7-8 hp per lb/min. A primary turbo in a compound setup will not make as much power as it would in a single turbo setup, maybe around 3/4 the power.

What is the importance of knowing the turbo compound engines?

The electric turbocompound system also provides more control flexibility in that the amount of power extracted can be varied. This allows for control of engine boost and thus air/fuel ratio.

How do I cool my turbo?

Drive your car gently for the last minute or two of the drive, or let the car idle afterwards for at least 60 seconds. By letting it run. the oil will continue to circulate and cool down the turbo.

Why does some turbo diesel engine does not require an intercooler?

Without an intercooler, the compressed air from the turbo is very hot and as a result isnt as dense as it could be. The hot air also reduces the amount of boost you can use before the compression from the engine causes predetonation (not an issue for diesel).

What is compound charging?

Compound charging is where two turbochargers (or superchargers, but for simplicity let’s look at turbochargers because the principle’s almost the same) are used on an engine and mounted in such a way as the output from one turbo is fed into the second.

How much boost can a single turbo make?

How much HP does a single turbo add? 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.

What is a sequential turbo?

Sequential turbocharging refer to a set-up in which the engine uses one turbocharger for lower engine speeds, and a second or both turbochargers at higher engine speeds. This system is intended to overcome the limitation of large turbochargers providing insufficient boost at low RPM.

What is a compound turbo kit?

Difference between Twin Turbos and Compound Turbo Kits | Diesel Power

Do twin turbos spool faster than single turbo?

Twin turbos are fantastic for the daily driven or mostly street-driven car. Each turbo needs the exhaust from only 4 cylinders to spool, so it spools much faster than a single kit. Smaller turbos in a twin-turbo kit can also produce similar power as a larger single turbo.

Do smaller turbos spool faster?

Smaller turbos spool up much faster than a single large turbocharger. Manufacturers may also use strategies such as using a small and a big turbo at the same time. The small unit spools up faster for low to moderate speeds, while the larger turbo kicks in at very high speeds.

Are compound and sequential turbos the same?

nm12valve basically sequential is small turbo for quick spool then gates open to let exhaust to large turbo for high airflow and boost, compound all air goes thru 1 turbo then compressed air into next turbo hence compound.

What size turbo is on a 2006 5.9 Cummins?

For instance, an HX35 turbo from a 5.9L Cummins measures somewhere around 54/69/14, which means it has a 54mm-inducer compressor wheel, a 69mm-inducer turbine wheel, and a 14cm2 exhaust housing.

What size turbo is a S475?

See all 19 photos The S475 was equipped with an 83mm turbine wheel and 1.0 AR turbine housing. See all 19 photos Run on the dyno with the Borg S475, the turbo 6.0L produced 878 hp and 804 lb-ft of torque at a peak boost pressure of 11.3 psi. See all 19 photos Next up was the larger Borg Warner S480.

How do I know what size compound turbo to buy?

Compound Turbo Sizing

How much HP does a turbo add to a diesel?

A turbocharger works with the exhaust system and can potentially give you gains of 70-150 horsepower.

How do you size a diesel turbo?

Turbos and Airflow

In reality, the answer is simple: turbos should be sized as small as possible for your desired horsepower. Luckily, airflow is one of those rare areas where the starts align, as roughly one pound per minute (lb/min) of air is equal to about 8 rear-wheel horsepower on a good running engine.