Turbocharging a Foton 25 hp....

   / Turbocharging a Foton 25 hp.... #11  
I'm no deisel mechanic, just a farm boy with wrenches...couldn't you just overbore the block, or stuff a larger block in there? I farm with old letter series Farmalls, and that always works out for me. Just an idea. Mike
 
   / Turbocharging a Foton 25 hp....
  • Thread Starter
#12  
Hi Mike,
the reason for not doing what you suggest is that it is major surgery. The tractor has 75 hrs on it and tearing the engine apart is not really what I want to do. Adding the turbo does not require any major teardowns. I can add it on probably without even removing the hood. The other reason is that the turbo helps with the efficiency of the engine. It make it use the fuel more fully by adding air under pressure. Normally aspirated engines can't fill the cylinders completely because existing air pressure is the only force you have to do so. The pressurized turbo air will fill the cylinders and more if you want.
As others noted, it does not do this for free. The turbo will create some back pressure in the exhaust system and by compressing the air in the intake it will add heat to the whole system. In trying to make lots of horsepower through turbocharging it is possible to burn things up quite easily. In my case, I'm not looking to make lots more power, just help things out a little. The turbo program is simpler than engine work in this case.
Hope that answers satisfactorily.

I read up on the other installation and see that this may not be too much to handle. Thanks for the links guys.

Frank
 
   / Turbocharging a Foton 25 hp.... #13  
Frank,

Please keep us (me) updated on any information you find during your research.

Thanks, Joe.
 
   / Turbocharging a Foton 25 hp.... #14  
Frank,

I've found a couple of turbos that I've been looking at.

One is a IHI RHB32 that was used for a Misubishi Charade car. That one has been popular for many looking to turbo a small engine according to what I've read.

The other two are an IHI RHB-V2 and a IHI RHB-V4. According to info, they are good for .8 to 1.2L engines. I'm not sure what the differences are though. I can't seem to get anyone who will reply to my questions. I did find a IHI .pdf that gave dimensions.

At any rate, I've been doing some math and my engine is 69ci., which equates to 1.130L. 25:1 compression. According to a few compressor maps I've found, that I would increase from 24hp to 28hp with only 3-4psi of boost.

Anyways, still many other variables to think about such as where to shoehorn it under the hood, oil supply, etc.
 
   / Turbocharging a Foton 25 hp.... #15  
Mega_Me said:
According to a few compressor maps I've found, that I would increase from 24hp to 28hp with only 3-4psi of boost.
Hate to burst your bubble Frank, but you can easily get that much just with simple governor and fuel delivery (injection pump timing) adjustments. That's the basic difference between the 254 and 284 versions of the Y385 engine. It's becoming unclear as to where your actual priorities lie: in obtaining a viable horsepower increase - or just plain old bragging rights.

Oh, and you calculated something wrong. The Y385 displacement is 93.5 cubic inches. See http://ruralking.com/netflyer_web/Tractor%20Project/25HPSpecs.htm

//greg//
 
   / Turbocharging a Foton 25 hp.... #16  
amafrank,
You are right about some diesel engines that use the same piston in the turbo version as the natural aspirated version. I have a diesel that is that way. It has 40 engine hp. The natural version has 33 hp. It is amazing the difference between the two. I did own the 33 hp version. When brush hogging, with the non-turbo tractor there is one hill that I would have to drop two gears to go up, but with the turbo tractor, I just give it some more fuel. The one major thing that is different between the two tractor other than the turbo is that the cooling had to be increased. The turbo tractor has an aluminum radiator with more fins per inch and it also has an oil cooler. If you can find a turbo that is the right size, you will be over the biggest hurdle. I say go for it. 4 PSI will give a pretty sizable increase in power.
 
   / Turbocharging a Foton 25 hp.... #17  
   / Turbocharging a Foton 25 hp.... #18  
Mega_Me said:
Actually, I was referring to MY New Holland which is a 69ci or 1.130L Perkins/Shibaura engine. I've just been following Frank's post as I share the same interests in terms of the end results.
Understand, and thanks for the clarification. Perhaps the content of that post will be of some use to the OP then. Sorry

//greg//
 

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