Hey,
Was just wondering if any of ya'll knew how to maybe tweak alittle more power out of my dad's 1997 JD 6400. It has the 4 cyl turbo diesel and was made in manneheim germany. Pretty sure it's a 85 hp factory setting. Any help would be appreciated! Thanks
ez

 

Don't quote me on this but I think there is a screw on the pump that you can adjust out to get more fuel. I think that you might actually have a p-pump on there. I am an International man btu I have seen a few JD's and I think that you can do this.

 

The problem with turnin up tractors is that they are usually maxed out on the amount of HP the engine can run without tearing up the other parts. Truck manufacturers tend to turn HP down and so we turn it back up, they do this mostly to neet federal guidlines. Tractor manufacturers tend to turn the HP up as high as the machine will support so that they can advertise higher HP and get more money for smaller cheaper to build tractors. So turnin it up could result in driveline problems. I spend some time on a few tractor sites and that question comes up occasionally. What I just gave you is the most common answer given but I have never seen anybody say it's ok to turn them up unless it's for competion.

 

Who said farming wasnt a competition???

 

I wouldn't do it, you will start to tear up drivetrain. The motor will handle it fine.

 

best way to get more ponies is to sell it and buy a ford/new holland.

 

does it say 4239 on engine plate ? 4 cyl 239 cu/inc engine.
If yes, do bigger injectors, and turn pump up.

Best to do it on a dyno, have done several in my shop.

 

I wouldnt turn it up at all.....