RTV1100 Turbo question???????????????

[chuckbuck]

I'm still trying to solve my boost problem.

As I have posted on the before, I installed a new TD03-7G turbo on my RTV1100 and was only getting 3psi of boost at MAX full load on the engine. Several folks said i need more fuel.

I can't determine how to do this so, I have ordered a shop service manual to determine how to get more fuel but I'm still wondering if the trubo is the problem or part of the problem.


I have talked to Kubota tech folks in Georiga and Lodi Ca, posted on several forums and sill can get the info needed to get this project on the road. I know this forum has a lot of smarts and i would really appreciate your help on this project.

Mikeyd, You said you were getting 6.5 psi boost on your setup and I'm wondering if you were able to get more than 3 psi of boost when you first installed the turbo without any other modifications to the govener/pump/injectors?


Regards,
Chuck

 

[Old Coot]

Sure wish I could help you. I never tried to put one on a diesel.
I put one on a 65 Mustang in the 70's. Seems no one I could find out about had ever tried it in that confined space. Finally got it going. You will to.

 

[chuckbuck]

Sure wish I could help you. I never tried to put one on a diesel.
I put one on a 65 Mustang in the 70's. Seems no one I could find out about had ever tried it in that confined space. Finally got it going. You will to.

I got the hard part done. Totally installed but it is only making 3psi boost. Tring to find out if it is the new trubo or i just need more fuel and how to get the fuel. The Kubota engine has a govener on it too.
Thanks, chuck

 

[john_bud]

What is the capacity of the turbo? Can it be that that kubota engine is just not producing enough exhaust to spin it hard enough to build boost? Is the piping sized right?

Getting more fuel is separate from the govenor. The fuel pump dictates the amount of fuel, the gov dictates the maximum rpm. On diesels the gov may be part of the fuel pump - don't know on this model. You need to talk to a fuel injection shop to determine how to turn up the fueling rate - normally it's pretty simple.

jb

 

[Old Coot]

What is the capacity of the turbo? Can it be that that kubota engine is just not producing enough exhaust to spin it hard enough to build boost? Is the piping sized right?

Getting more fuel is separate from the govenor. The fuel pump dictates the amount of fuel, the gov dictates the maximum rpm. On diesels the gov may be part of the fuel pump - don't know on this model. You need to talk to a fuel injection shop to determine how to turn up the fueling rate - normally it's pretty simple.

jb

I was wondering if the turbo is to big for the engine and like you said it doesn't produce enough exhuast to spin the big turbo fast enough to produce more then 3.5lbs. The piping is just as important as the size.

 

[chuckbuck]

What is the capacity of the turbo? Can it be that that kubota engine is just not producing enough exhaust to spin it hard enough to build boost? Is the piping sized right?
jb

The turbo is a Mitisubushi TD03-7G. It is suppose to be good for 800 to 1200cc engines. Mickyd used this turbo and was able to get 6.5psi of boost.

The inlet pipe to the turbo is 1.5 inches dia, same as stock and the exhaust outlet is 2.5 inches.

I did find out how to adjust the rack on the injector pump and was able to get the boost up to 4 psi. This was the most I could get by adjusting the rack.

Any suggestions would be appreciated,
Regards,
Chuck

 

[CarterKraft]

Is the turbo exactly the same as the other guys?

A slight trim differance will cause problems.

 

[CarterKraft]

After reading the other post, I think I have some TD03's and the ones I have are way to big for that engine, I think.

I would verify the compressor and turbine trims before going any further.

 

[chuckbuck]

I have posted some photos of my installation.

It was a simple installation and didn't take much fabrication. The turbo hot inlet is 1.5 inches and the exhaust is 2.5 inches. There is no muffler so there is no back pressure on the trubo. The turbo does a good job muffling the exhaust. It's slightly louder that stock. You can definately hear the turbo.

The turbo cold inlet is 2 inch and i used radiator hose. I was able to keep the air filter in the stock position. The trubo air exhaust into the engine is 1.5 inches.

I'm still only getting 4 psi of boost. My EGT is about 1100 deg F.

I have adjusted the injector pump rack and set the rpm to 3600.

Still tring to figure out how to get 6 to 7 psi boost.

Any suggestions would be appreciated.

Regards, Chuck

 

[chuckbuck]

Is the turbo exactly the same as the other guys?

A slight trim differance will cause problems.

As far as i know it is the same. TD03-7G.

What so you mean "A slight trim differance will cause problems"? What is trim and what problems can it cause?

Thanks, Chuck