Quick Answer

How much HP can a 12 valve handle?

Though it’s quite restrictive, the factory cast-iron 12-valve cylinder head will allow you to reach 500 hp, but that aged head gasket might not live at 35-45 psi of boost.

Is a 12 valve or a 24 valve faster?

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.

What is the difference between a 12 valve and a 24 valve?

12V vs 24V Cummins: Which One is Better?

When did they stop making 12 valve?

Cummins produced the 5.9L 12v Cummins for Ram pickup applications through the 1998 model year, where it was phased out in favor of a more emissions friendly 24 valve platform. The engine’s widespread applications include light and medium duty trucks, agricultural equipment, and construction machinery.

How much boost can a 12 valve take?

Yes, the rule of thumb is 40-50 psi of boost, but that’s more because of the increased drive pressures associated with more boost.

Why is the 12V Cummins so good?

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.

Are 12v and 24v blocks the same?

Minor difference, but different none the less.

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.

Are 5.9 Cummins reliable?

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.

Is a 12 valve Cummins a V8?

The Cummins engine had been successful in agriculture implements for a few years prior, so in 1989 Cummins and Chrysler introduced the 12 valve as an alternative the the V8 gas powered Dodge. It was a hit immediately for those that wanted double the torque and a better option for fuel economy.

What does 12 valve engine mean?

Hi, 3 Cylinder 12 valve engine has 4 valves per cylinder. 4 Cylinder 12 valve engine has 3 valves per cylinder and 4 Cylinder 18 Valve engine has 4 valves per cylinder. 4 Valve cylinder has higher performance with respect to power generated per cylinder and makes a better selection.

Are 12 valve and 24 valve pistons the same?

Actually, the 12 valve and 24 valve blocks are much the same through 2002. Around 1998 they changed to the STORM blocks but parts are interchangeable between them. When the common rail was introduced in 2003 the block changed some more. A high performance option is to install a P7100 injection pump on the 24 valve.

How much is a 12 valve Cummins Engine worth?

A shop skilled in Cummins swaps will charge around $12,000 to $15,000 to take a 12-valve version with the 5R110.

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 horsepower does a 5.9 12 valve Cummins have?

The Cummins 5.9-liter 6BT 12 valve has 230 HP, 440 lb-ft of torque, and a P7100 inline injection pump right out of the box. The 12-valve is also a popular engine swap choice, powering a slew of Jeep, rat rod, muscle car, and dragster projects.

How much horsepower does a 12-valve make?

Adding a P7100 to the first generation 12-valve engine effectively takes the truck’s horsepower capability from 350 rwhp to 600 rwhp.

How much HP can a 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.

How do I increase the power on my 12-valve Cummins?

Double The Horsepower of Your 12 Valve Cummins | Power Driven Diesel

How reliable is a 12v Cummins?

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.

What will 4k governor springs do for my 12v Cummins?

The Industrial Injection 4000 Governor Spring Kit is by far the best modification you will ever do to your 12 valve Cummins engine. The factory governor generally will slowly start to defuel the engine around 2300-2400 rpm and drastically decrease performance and pulling power.

Is Cummins better than PowerStroke?

Powerstroke Diesel vs.

Most diesel enthusiasts seem to agree that the Cummins Turbo Diesel is the better engine in terms of reliability, but the Ford pickups tend to last longer and be more reliable than the Ram pickups.

Can I put a 24 valve head on a 12 valve block?

Also, the 24 valve head won’t work with the 12 valve pistons. Assuming you are asking about the truck in your signiture, keep your 12 valve head. If you want better airflow, run over size valves, and a healthy port job with the shelf removed.

Are all 5.9 Cummins blocks the same?

From ’94-’97, all 5.9L Cummins engines shared the same cast-iron block, crankshaft, main cap bolts and cylinder head found on the ’89-’93 mills.

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.

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.

Is 5.9 or 6.7 Cummins engine 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.

When should you replace injectors on 5.9 Cummins?

How long do fuel injectors last? Fuel injectors for the Dodge Cummins 5.9L should last between 200,000 and 300,000 kms when properly treated. This means running good quality clean diesel fuel.

What is high mileage on a Cummins diesel?

Like the Duramax, Cummins diesel engines can be expected to last a long time. Between 350,000 and 500,000 miles is usually considered high mileage on a Cummins diesel.