904cc Yanmar Injection Pump Tuning
 

I have recently purchased a 2011 Polaris Ranger with the 904cc Yanmar Diesel. I am planning to turbo this motor for a lil more performance and giddy-up. I have already acquired the turbo but my problem is tuning the fuel side. The pump looks very similar to a P-pump but does not offer similar adjustments for more fuel. So my question is can I just tune the pump? Or am I going to need to have my injectors honed and hope that solves the fuel issue?

Any information on this motor is appreciated.

Can you get the pump number? and a pic?

Your polaris is way to new for this? Are you almost at the end of the warrantee? But if your going to modify it. You might want to try purchasing a technician manual for it, and learn everything you can on it. try talking to a tech that works on them? or try this forum I just checked it out they talk about the ranger but I seen no info on the diesel. Polaris Ranger Club LLC This forum has info, and I am sure somebody on here can help you.

Yea its new but thats never stopped me before. New is just a base for a bad ass build in my opinion. lol. As far as talking to someone the technicians at the dealer I bought it from are polaris techs, not diesel techs. So they didnt have any info on it. Infact they told me I was better off doing my own service on it rather then bringing it into them. And I searched online but found nothing. So that is why I am here. I am hopeing someone with some experience on this motor is on this site and can lend some info.


I will see if I can get some info of the pump directly tomorrow and some pics of the the motor and pump.

thats the truth too

Oh and a note on the torque... I have already completely sheered a rear axle shaft in half, blew out the rear diff, and bend a front axle shaft to the point that it destroyed the CV joint.

I think its got a little more toque than it can handle.

---AutoMerged DoublePost---

Attachment 43899
Attachment 43900
Attachment 43901
Attachment 43902
Attachment 43903
Attachment 43904

Needs NOS

but ya I have a Buddie that is into these things let me run this by him and I will get back to ya

As new as these polaris diesels are. I would find a service manual on the power-plant from Yanmar. That way you could learn where to turn the fuel up. especially if they have a blown view of the pump, it will put in perspective befor you actually start tearing into it. When you figure it out you will be schooling the next set of members on here! I herd that those Rangers are selling well. so there is going to be another niche in the diesel performance industry. I need to patten my thoughts before another person capitalizes over me again. What type of turbo are you planning on using?

I've tryed to find more info on the motor. Not sure where to look.

As far as the turbo I got an Older Air Research Garrett turbo. I'll get some pics up of that soon.

So does anyone have any info on tuning this pump? I'd really like to know if Im gonna have to have my injectors honed or not.