Momtana 4940C With Turbo

[Guesseral]

I've worked on rotating equipment for a good bit of time now and so I've learned about engines gas and diesel along with manual and automatic transmissions. If man can build it, then man can fix it or make it better. I'm not a low budget or red neck builder. I pay very close attention to specs and measurements. The reason I have been saying I'm buying parts from Caterpillar is because Caterpillar is using the same Mitsubishi S4Q2-T engine in their 305C CR mini excavator as did Montana did in their 4940 series tractors but, not the turbo version of the S4Q2 engine. So, I'm getting parts from Caterpillar and other suppliers to complete my project.

Don't you have to change the crank and stuff like that to turbo?

 

[Texasgreen]

Don't you have to change the crank and stuff like that to turbo?

No, current engine specs are fine. I have checked with Mitsubishi engineering.

 

[barneyrb]

I am real interested in how this turns out. I've got a Yanmar I am thinking of adding a turbo and want to hear how much power increase you get. Also will the factory cooling be enough to handle the turbo'd motor.....

 

[Texasgreen]

I am real interested in how this turns out. I've got a Yanmar I am thinking of adding a turbo and want to hear how much power increase you get. Also will the factory cooling be enough to handle the turbo'd motor.....

I'm about to start installing the turbo. The growing season is over here in South East Texas so I'll have some down time on my tractor very soon. You mentioned about the cooling, that had been one area of concern. My tractor never runs hot and by adding a turbo if make it run a little hotter. I'll only know come next summer. If it does then I'll run a larger core radiator.

 

[Texasgreen]

Here is a quick update. Its finished and runs very good. I can feel the power difference it's almost like I'm in a different tractor now. My tractor doesn't feel lazy or sluggish anymore and there is a power difference. Ask questions if you have any.

 

[Ilikeurtractor]

Nice job and congratulations :thumbsup: Can you tell us how much more fuel you're adding (if any) and how much boost it's making?

 

[LindenBruce]

Nice. What are your expected HP/TQ gains? B.

 

[Texasgreen]

Nice. What are your expected HP/TQ gains? B.

The technical information I have found on this set up shows a increase of 8 more hp and 21 more foot pounds of torque. I haven't had the chance to put it under a heavy load yet. It's winter here in Texas and the grass is not growing too high so I haven't put it work yet.

I can tell from using the FEL moving some heavy and sticky clay dirt around that the power and torque is much more then before. It never did run any hotter.

 

[barneyrb]

Getting back to my cooling question earlier......on my tractor I was thinking of adding an oil cooler instead of trying to increase water capacity..... thoughts? On my Myanmar they do make a turbo version and the power goes from 40 to 55 with a turbo addition so I'm thinking your estimates may be a little conservative.

 

[LiveRoll]

Is that a factory tint on your windows?? It looks great!! How does the tractor sound now? Do you keep a window cracked to hear the whine??

Cheers

Roger