Quick Answer

Question: 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 12 valves better than 24 valves?

The 12 Valve engine is hands down more reliable than the 24 Valve. Even guys who have spent the money to get an aftermarket lift pump (a must with a 24 Valve, along with a fuel pressure gauge) have gone through multiple pumps.

How does a Cummins thermostat work?

Thermostat Operation

As the engine warms, heat swells the heat sensor. A mechanical link, connected to the heat sensor, opens the thermostat valve. As the thermostat begins to open, it allows some coolant to flow to the radiator, where it is cooled.

What does a 12 valve mean?

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 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 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.

When did Cummins stop making 12 valve?

Specifications. The 12 valve was manufactured between 1989 and 1993, and its common names include 6BT Cummins 12V, 12 Valve Cummins, and 1st Generation Cummins.

How do you test a diesel thermostat?

How to test a thermostat in 3 minutes (Must watch).

At what temperature the thermostat opens generally?

Once the engine reaches its operating temperature (generally about 200 degrees F, 95 degrees C), the thermostat opens.

What temperature does a diesel thermostat open?

Once the temperature of the coolant rises to between 180 and 195 F (82 – 91 C), the thermostat starts to open, allowing fluid to flow through the radiator. By the time the coolant reaches 200 to 218 F (93 – 103 C), the thermostat is open all the way.

What does a 12 valve need to run?

All 12-Valves are non-electronic injection pump engines and DO NOT require any electronics from the truck to run. The simplicity of the 12-Valve engine makes it the easiest to install, maintain, and most dependable.

Do 12 valves have lift pumps?

12 valves have a mechanical lift pump mounted to the block and using a cam lobe
the lobe was deleted on 24v cams.

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 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

What’s better 24v or 12v 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.

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 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.

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 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.

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.

How much does it cost to 12 valve swap?

Going the 12-valve, 5R110 route can be pulled off for $12,000 to $15,000 at a shop that’s seasoned in Cummins swaps. Sprinkle in a little more power and the cost obviously goes up, but for a basic, 350hp (ish) 5.9L-powered ’03-’10 Super Duty you’ll get a Cummins repower that’s cleanly done and rock-solid reliable.

What Cummins Engine is best for swap?

Those looking to perform a Cummins diesel conversion often stick with the 5.9 L Cummins motor found in trucks from 1989-2007 as they feature reliability, power, fuel economy, and simplicity. Arguably, they have been proven to be the best diesel motor to swap into most any application.

Which is the best Cummins Engine?

Cummins 6.7L Turbo Diesel

The Cummins 6.7L Turbo Diesel is the current incarnation of this legendary diesel engine. It is packed with features that make it the best Cummins engine that is currently on the market.

How much HP does a 12 valve Cummins have?

5.9L Cummins 12v (6BT) Engine Specs

Engine: Cummins 6BT (commonly referred to as the “12 valve Cummins”)
Horsepower: 160 – 215 HP @ 2,500 RPM
Torque: 400 – 440 lb-ft @ 1,600 RPM
Governed Speed: ~ 2,700 RPM
Engine Weight: ~ 1,100 lbs, dry & dressed (~ 890 lbs dry, engine assembly only)

How much horsepower does a 12v Cummins have?

12V 5.9L Cummins Horsepower & Torque

Year Trans Horsepower
1994-1995 Auto 160 horsepower
1994-1995 Manual 175 horsepower
1996-1998 Auto 180 horsepower
1996-1998 Manual 215 horsepower

Do they still make 12 valve Cummins?

The Cummins would see another change in the trucks following 1998. A major change was moving from 12 valve to a 24 valve. Another noticeable change was the Bosch VP44 Injection Pump. It was a half-mechanical, half-electronic rotary style pump.