Quick Answer

Question: Is 24 valve or 12 valve better?

In summary, those looking to keep things stock or modest the 24v is the better street engine. If you’re looking for extreme power and performance the older 12v Cummins engine is likely the better choice.

Are 12 valve and 24 valve blocks the same?

One difference that I know of is a 24v block has two oil drain provisions cast into the block near the pan rail and a 12v only has one. Minor difference, but different none the less.

How can you tell the difference between a 12 valve and 24 valve Cummins?

If your looking at a 94-02 with the original badges on the doors of the truck a 12v will say “cummins turbo diesel” and a 24v will say “24v cummins turbo diesel”. Also 94-97 originally came with crome door mirrors which would indicate a 12v but the 98 12v and 24v’s all came with black plastic mirrors.

What is a 24 valve engine?

How Many Cylinders Does A 24 Valve Have? The ISB features four valves each cylinder, making it a multi-valve pushrod engine design. This is also known as a 24 valve Cummins. For every five horsepower removed by the engine, five additional resources are provided.

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 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.

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.

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.

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.

What is a 12 valve engine?

The 12 valve was manufactured between 1989 and 1993, and its common names include 6BT Cummins 12V, 12 Valve Cummins, and 1st Generation Cummins. The engine is an inline-6 cylinder with a cast-iron block and a cast-iron cylinder head with six head bolts per cylinder.

Can you put AP pump on a 24 valve?

While not everyone is looking to build a twin-turbo, P-pumped, sled pulling monster, the same basic parts used in this swap can be fitted to any 24-valve truck.

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 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 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.

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.

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.

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 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.

When did they stop making 12v Cummins?

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.

What year Cummins has 53 block?

The Cummins “53” Block was used in Cummins 24 valve ISB diesel engines from 1998.5-2002. Manufactured by Brazilian company, TUPY.

What year did Cummins switch to 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.

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.

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)