Increase in horsepower?

[Frank from Ky.]

Happy New Year. Tis the season to overhaul the old 3000 diesel.It is a 3 cylinder. I am wondering if I rebore my engine block to accept 4.4 cylinders from the present 4.2 if I will see any increase in horse power. If so how much? Is it worth the time and expense? Thanks in advance for any constructive comments.

 

[Old Ford Mechanic]

The best way is to trade the 3000 for a 4000.Increasing the bore alone won't give much more.

 

[Fordfarmer]

A standard rebore is usually .010", .020", or .030". Probably no noticable increase in power. Increasing from 4.2" to 4.4" would increase your power, but can't be done- there ins't enough cylinder wall material. That would be a .200" overbore. An engine out of a 4000 or 4600 would bolt in, and give you your power increase, but I'd agree with O.F.M.- you'd be better of just buying a bigger tractor.

 

[Jerry/MT]

Increasing the bore from 4.2 to 4.4 will increase the displacement by (4.4/4.2)^2 = 1.0975 @ constant stroke so you should see a gain in horsepower from dispacement increase of about 10% (9.75% to be exact). You"ll increase the ring friction by a little bit because of the surface area increase cauing a small decrease in hp but you"ll increase the compression ratio, assuming your combustion chamber volume remains the same so you"ll net some more performance out of this change. The loads on the crank, rods, and pistons will go up some as will the piston crown temps, but I can"t believe that there isn"t margin in the design to preclude this causing a problem. I"d guess you get a minimum of 10-15 % ( depending on the compression ratio change) improvement it power and also a reduction in fuel usage because of the effect of the increased compression ratio.
On a 30-35 HP tractor that"s 3-5 hp. Don"t know what the cost of the change is but you"ll have to figure out if it"s worth it.

Hope this helps

 

[RodinNS]

That will take your engine from it's present 175 cid to a 192 cid.
I'm assuming that's what your aiming for, and planning on using Ford parts to do it...
I would suggest looking in the online parts catologue at newholland.com/na and check the blcok part numbers. I THINK you'll find that the 175, 183, 192 and 201 are all the same block... but I could be wrong. The 175 block should have the meat to take that boring. The others, if you try to bore them over 40 are not so difficult to strike water in...

Assuming that you do this you won't gain one bit of power unless you're prepared to turn the pump up and probably change the injector nozzles out to a larger nozzle. I wouldn't worry about anything else internal in the engine. Thoae parts were all common throughout the 3 cylinders. Cranks, rods, valves, heads etc were all the same for a given time frame.
I'd say you could expect 50 PTO hp from that engine if you put the parts into it and fuel it properly. Then you've got to keep it cool....
Add to that the fact that the 3000 doesn't have the rear end to tolerate too much more.... It might just be easier to get a 4000 an be done of it unless you just want the power for PTO work.
It's going to cost you no matter which way you go.

Rod

 

[Mike of the North]

I am new to tractors, so I am not sure if the will work but I know on the forum for my old Opel GT some of the members have increased size of their engines by getting the crank welded and reground to increase the stroke. The original 1.9l can be turned in to a 2.2l this way, I can't remember the H.P. increase off the top of my head but with a car that only weighs 1900 lb. it makes a difference, on a much heaver tractor it may not help much.
Mike

 

[Dave in MS]

(quoted from post at 19:48:11 01/01/08) I am new to tractors, so I am not sure if the will work but I know on the forum for my old Opel GT some of the members have increased size of their engines by getting the crank welded and reground to increase the stroke. The original 1.9l can be turned in to a 2.2l this way, I can't remember the H.P. increase off the top of my head but with a car that only weighs 1900 lb. it makes a difference, on a much heaver tractor it may not help much.
Mike

ou can increase the stroke that way and it will give you more torque, but it will be an expensive proposition at best. The Connecting rods will have to be replaced with shorter ones or else the pistons will have to be replaced with the wristpin holes bored lower in the skirt. An engine swap will be a lot more economical, and effective.

 

[jimhaze]

I bet with a fresh motor and pump work with injectors the 3000 will really surprise you. Does it have a Simms pump? They are doggy to a certain degree but have lugging power.