436 DT engine mods.

farmerBob · New User Joined: 01 May 2009 Posts: 4 Report to Moderator

Hi All! I own a 4166 International tractor with the 436 DT engine. I would like to get a bit more power out of it and am thinking of turning up the injector pump. I have not gathered enough information as of yet to do it and am looking for suggestions.
I have noticed that the 1460 and 1480 IH combines use the 436 DT and are rated at 170 and 190 hp respectively. I am curious as to what the differences in those engines and mine are.
Any thoughts or ideas.

Jerry/MT · Posted: Fri May 01, 2009 7:35 pm Post subject: Re: 436 DT engine mods.

"Turning up the pump" will increase the horsepower on a diesel engine but it will also increase the max pressures and temperatures. That means the internal loads will increase and the cooling loads will increase. If the engine is designed to take these increased loads and tempertures and the lower powered versions of the engines all use the same high power components, all that will happen is that engine life, when run at high powers, will be less then that of a derated engine.

However, if the derated engines use lower cooling flows, less piston crown cooling oil flow, different materials, etc, turning up the wick can lead to premature failures.

The folks that designed your engine are the ones who need to answer the question you are asking.

farmerBob · New User Joined: 01 May 2009 Posts: 4 Report to Moderator

Hi Jerry, thanks for the information. I am aware of what too much will do. I am not trying to make a smoker/puller just trying to get a bit more power. It is done all the time with cars,trucks,and tractors.
One thing I am going to add is the tack on this tractor shows that the rpms are down according to what I remember... the needle never gets farther than halfway into the PTO yellow range at wide open throttle with no load, I don't recall what the rpm's are right off hand but I do know that every one of our other red tractors will go past the PTO range a few hundred rpm's.

Jerry/MT · Posted: Sun May 03, 2009 1:36 pm Post subject: Re: 436 DT engine mods.

I"m sure someone with some direct experience on this engine could give you some specific advice on what its weaknesses are if you want to uprate the engine. My point was just to be careful when you turn a pump up and to expect more wear and tear on the engine if you use the increased power a lot. You might consider changing the oil more often and don"t let the air filters get too dirty, etc. to reduce some risk.

From an engine life viewpoint, it"s better to buy a big engine and run with some derate than to take a small engine and uprate it.

RickB · Posted: Sun May 03, 2009 1:40 pm Post subject: Re: 436 DT engine mods.

As far as a 436 is concerned, I'd be a whole lot more concerned with the durability of the components bolted behind it, and the ability of the cooling system to keep up with the added demand. The IH 400 series engines themselves will stand up to a bunch of fuel if kept reasonably cool.

RodinNS · Posted: Sun May 03, 2009 5:38 pm Post subject: Re: 436 DT engine mods.

I'd agree with that too. I've got mroe experience with 466's but I'd think the idea about the same. There's a lot of room there to give them some twist... if, as you say, they are kept cool and the rest of the trap doesn't go to pieces.

Using some common sense in how that power is applied will be as big a factor as any.

I'd also install a pyrometer and keep an eye on that fairly closely.

Rod

wmasse · New User Joined: 30 Apr 2009 Posts: 8 Report to Moderator

I had 1586 had the pump turned up and cooling and EGT was the only problem Spinning was a bit of a problem also had the front fully weighted R20.8 38 duals on it.That was a good tractor but I had to move up to 4 wheel drive.
I also has 4 1480 with 466 great combine for the money. At these prices it's always good to have a spare or two.

farmerBob · New User Joined: 01 May 2009 Posts: 4 Report to Moderator

The engine is in a 4166 four wheel drive tractor.
Although it is an old tractor its in good condition and has low hours. It was used in a logging outfit and not worked hard. Mostly for pulling stuck equipment out of the mud once in a while.

Again, I don't want to crank it up bunches, maybe 10-25hp more if I can.

What is the difference between the 170 and 190hp 436 DT engines used on the 1460 and 1480 combines? My 436 DT engine is rated at 130hp. I'm guessing the combines used a bigger pump and the internals are probably the same as my engine.

wmasse · New User Joined: 30 Apr 2009 Posts: 8 Report to Moderator

I am not sure if there is any difference probably just turned up. The older ones have a rotary fuel pump and the newer ones have in line. The cooling is better on the combine because we have never had cooling trouble. All of my 1480 have 466 and one is running at2810 rpm no load the rest at 2750. The one at 2810 rpm will run along with the neighbour 2188 most of the time unless it gets tough.

Mike M · Posted: Tue May 12, 2009 9:59 am Post subject: Re: 436 DT engine mods.

I see where the RPM may be down. Have this checked as it will affect your HP ALOT ! It may only need to be set to run the right speeds to meet your needs.