4 bt cummins hp

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All 4BT applications lack an intercooler which is great for packaging constraints but terrible for power. An intercooler is a great way to pick up horsepower and improve power consistency by keeping charge air temperatures lower.

As far as fueling is concerned, upgraded injectors are an excellent place to start, but are not necessary for small power increases. The P fuel injection pump is the same one found in the 6BT. You can also ground down or remove the fuel plate which is what controls the maximum fueling. Fuel timing is crucial on the 4BT, so be sure to set it right, or you may have a blown engine on your hands. Past the basic fueling mods, aftermarket governor springs are a great way to pick up power.

The OEM governor springs of the P pump limit the engine to 2,rpm with de-fueling starting at 2,rpm. Aftermarket governor springs will allow full fueling up to 3,rpm or even 4,rpm depending on what spring kit you purchase. It should be noted that the fueling modifications listed above apply only to 4BT engines with the Bosch P pump. Models with the later VE-pump require different modifications.

The real reason you might want to swap a 4BT is for fuel mileage, and size constants. If fuel mileage is your legitimate reason for swapping, then the 1.

So what have we learned so far? Many 4BT engines have gone way past , miles. Jeep people love the 4BT because it is pretty much the best diesel that can fit inside of a Jeep other than the much less common 1. Let me know what you think of the 4BT in the comments below! Bryce Good morning and thanks for the articles. I want to swap a diesel in my 84 S10 extended cab.

Can you suggest a diesel engine? Thanks, Harry. I am now being told by others that I have a fake engine or a knock off.

None of the engine numbers on the block are good supposedly. Suppose to start with 7 or 8. Mine starts with 1. Does anyone know anything definite about this? I can think of a few reasons. Great article. I have a 4BT 3. The boat i have is a , 24 foot Eastporter trawler and only gets up to 11 knots. I just use it for fishing but am considering putting a 6bt in the boat and wonder how much longer it is. I think the weight of the 6bt is about lbs heavier. Is the Cummins 4BT the way to go?

I used a beefed up r4 in the half ton with a 2. I used a 5 speed ZF with a 3. Lord fluid motor mount in both. No problems with either. Would a 16v 4bt fit inside of my 4. Looking for a diesel for it that has capability of making decent power with mods. There is not any official list of 4BT applications, but bread trucks are definitely the most common application. Modern applications have since moved on to newer and more efficient diesel engines including the R2.

The 4BT is by no means a performance engine. As we said above it was used in applications such as bread trucks and the numbers show it. Of course, the 6BT is also very weak straight from the factory, but with some modifications to the fuel system and fuel timing, big power can easily be achieved.

The common 6BT fuel modifications apply to the 4BT, as they share the same fuel pump and injectors. If you want big horsepower, a turbocharger upgrade is a great place to start. An HX35, HE, or HE are great budget options that will flow significantly more air than the stock 4BT turbocharger at the cost of throttle response. All 4BT applications lack an intercooler which is great for packaging constraints but terrible for power.

An intercooler is a great way to pick up horsepower and improve power consistency by keeping charge air temperatures lower. As far as fueling is concerned, upgraded injectors are an excellent place to start, but are not necessary for small power increases. The P fuel injection pump is the same one found in the 6BT.

You can also ground down or remove the fuel plate which is what controls the maximum fueling. Fuel timing is crucial on the 4BT, so be sure to set it right, or you may have a blown engine on your hands. Past the basic fueling mods, aftermarket governor springs are a great way to pick up power. The OEM governor springs of the P pump limit the engine to 2,rpm with de-fueling starting at 2,rpm.

Aftermarket governor springs will allow full fueling up to 3,rpm or even 4,rpm depending on what spring kit you purchase. It should be noted that the fueling modifications listed above apply only to 4BT engines with the Bosch P pump.

Models with the later VE-pump require different modifications. The real reason you might want to swap a 4BT is for fuel mileage, and size constants. If fuel mileage is your legitimate reason for swapping, then the 1. So what have we learned so far? Many 4BT engines have gone way past , miles. Jeep people love the 4BT because it is pretty much the best diesel that can fit inside of a Jeep other than the much less common 1. Let me know what you think of the 4BT in the comments below! Bryce Good morning and thanks for the articles.

I want to swap a diesel in my 84 S10 extended cab. Can you suggest a diesel engine? Thanks, Harry. I am now being told by others that I have a fake engine or a knock off. None of the engine numbers on the block are good supposedly.

Suppose to start with 7 or 8. Mine starts with 1. Does anyone know anything definite about this? I can think of a few reasons.

Great article. I have a 4BT 3. The boat i have is a , 24 foot Eastporter trawler and only gets up to 11 knots. I just use it for fishing but am considering putting a 6bt in the boat and wonder how much longer it is.