Quick Answer

Frequent Question What’s better a 12 valve or 24 valve Cummins?

When it comes to serious power and performance the 12v 5.9 Cummins takes the win. These engines are known to hold up better at extreme power levels when compared to the 24v engines. P7100 injection pumps on the 6BT are easier to mod and support the extra power.

Is the Cummins 24 valve a good engine?

Cummins 5.9 24v Reliability

Outside of the fuel system, the 5.9 24v is a very reliable engine. The engine internals such as the pistons, rod, and crankshaft will last a lifetime and can hold up beyond 500,000 miles.

What is so great about the 12 valve Cummins?

What made the Cummins so popular was the fact that its peak power and torque was insanely usable—in fact, the redline is only at 3,000 RPM! The 12-valve was able to get respectable fuel economy while producing torque figures never-before seen in an ordinary pickup truck.

What year 5.9 Cummins is best?

1994-1998 2500 &amp
3500

As far as performance potential goes, it doesn’t get any better than the mechanical P7100 equipped versions of the 12-valve 5.9L Cummins. They’re simple, rock-solid reliable, and can easily tick off a half a million miles if properly maintained.

How long will 5.9 Cummins last?

The Cummins brand is extremely reliable and prides itself on long-lasting engines. The 5.9-liter engine can expect to churn out 300,000 to 400,000 miles.

How many miles will a 24 valve Cummins last?

The lifespan of the 24 Valve Cummins diesel can vary depending on how it is cared for. However, consumers report that you can expect an average lifespan of 300-350,000 miles. Nonetheless, there have been consumers who report exceeding 500,000 miles on their 24 Valve Cummins engine.

Are 12v Cummins reliable?

The Cummins 12v/6BT is widely regarded as the best and most reliable diesel engine ever produced. These engines are extremely simplistic, operating with mostly mechanical components rather than complicated electronic ones. The simplicity allows for massive power potential in conjunction with ultimate reliability.

Is the 5.9 or 6.7 Cummins better?

To sum up, the more simplistic 5.9 fixed geometry turbo means that while it tends to be more reliable, the more advanced 6.7 variable geometry turbo gives better performance. The Exhaust Brake is a big part of why the 6.7 Cummins is such a powerful towing machine.

Which year 12 valve Cummins is best?

1996-1998 has the best injection pumps (perhaps ignoring the 1989-1993 VE) and stronger automatics compared to earlier years. Look at the buyers guide section in the thread below. The 1998 12 valve trucks were only built in 1997.

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.

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 much HP can a stock 5.9 Cummins handle?

The 5.9L inline-six mill’s factory rotating assembly from ’89 to ’02 is capable of handling 800 hp (1,400 to 1,600 lb-ft of torque) without breaking a sweat, and is often pushed into four-digit territory before aftermarket rods become a consideration.

What is the most reliable Cummins engine?

The most reliable diesel engine ever made was the 5.9L Cummins 12-Valve 6BT. The 5.9L 12-Valve has million-mile durability. It came factory with a 230hp, 440lb/ft of torque and an inline P7100 injection pump.

How can I get more power out of my 5.9 Cummins?

By feeding more fuel into this massively-compressed engine, it’s only natural that you can unlock more power. Though, you can still out-do the factory turbo by adding too much fuel. With the 5.9 Cummins, 50-hp or 75-hp injectors are about the maximum injector size with the factory turbo.

What is high mileage on a 5.9 Cummins?

Of the highest is a 1996 Dodge Ram with a 5.9-liter Cummins diesel engine that has 3,016,789 miles. Following that is another two 5.9-liter Cummins engines that also have over 3,000,000 miles on them.

How often should you change oil in a 5.9 Cummins?

04′ 5.9 Cummins

One is through Dodge for the powertrain
7 years or 70,000 miles. The motor had a second warranty for 7 years or 100,000 miles and they would warrant the motor with an oil change interval of 15,000 miles.

What is high mileage for a Cummins diesel?

According to Consumer Reports, a properly maintained Cummins engine can last 300,000-350,000 miles. But a poorly-treated truck can wear out much sooner. Therefore, a diesel truck with proper service records or even one that received precise “fleet” maintenance commands a premium.

How much horsepower can a 24 valve Cummins handle?

The results include quite substantial flow increases. From the factory, the engines were rated at 235 hp and 460 lb-ft of torque. The high flowing aftermarket VP44 pumps are now almost capable of supporting 800-plus horsepower on straight No.

What RPM should a 24 valve Cummins idle at?

Idle RPM is 850 per the engine plate. The tach isn’t very accurate. Custom pinstriped Power Wheel. I started out with very little…

Are all 5.9 Cummins 24 valve?

In 1998, the 12v Cummins was phased out in favor of a redesigned 24 valve version of the engine, the 5.9L Cummins ISB (often referred to simply as the 24 valve Cummins). The ISB featured a Bosch VP44 rotary type injection pump until 2003, when the injection system was upgraded to a Bosch high pressure common rail.

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.

How many miles can a 12V Cummins go?

Cummins diesel engines typically have a range of 350,000 to 500,000 miles.

What is a 12v Cummins?

The 12-valve Cummins, officially the Cummins 6BT, is the engine at the bottom of the family tree of diesel engines (at least in pickup trucks). Its simple, straightforward design is a symbol of reliability, solid engineering and tractor-style torque.

How much HP does a 5.9 Magnum have?

At 5.9L, producing 245-250hp and 335-350lb-ft. of torque, the 5.9 Magnum has generally been criticized for its lack of power compared to its Ford 5.4 Triton and Chevy 5.3 Vortec competitors, despite its materially larger engine size.

How much HP does a 7.3 diesel have?

7.3L Power Stroke Specs

Engine: 7.3L Power Stroke diesel V-8
Peak Horsepower: • 210 hp @ 3,000 rpm (intro horsepower rating, 1994 MY) • 275 hp @ 2,800 rpm (peak horsepower rating, 2003 MY)
Peak Torque: • 425 lb-ft @ 2,000 rpm (intro torque rating, 1994 MY) • 525 lb-ft @ 1,600 rpm (peak torque rating, 2003 MY)