EGR delete on new turbo Kubota?

[kuboman]

I have a L5740 and will be interested in hearing how this comes out. Since the EGR keeps combustion temps down and you will no longer have it, will the higher temps have a negative effect on piston tops, turbo turbine, etc.? Of course the tractor companies interested in improved fuel economy reduce NOX with SCR so I assume they build the engines to handle higher internal temps and Kubota uses pistons and turbos built by the same suppliers. By the way the law says that in my power class Kubota must warrant the emissions related items for 3,000 hours and that is a lot longer than I intend to have my tractor.

The EGR engines have retarded timing so I doubt exhaust temps will be a problem. Any way you would have to put it on a plow and work the crap out of it before you might harm it anyway.

 

[wmonroe]

Put an exhaust temp gauge on and get a baseline temp range with the egr intact. Once you have a good baseline pull the egr and see what changes.
One thing to keep in mind, increasing the timing will reduce egt's on a gauge but increases the heat sink to the pistons/cylinders.

 

[lhansman]

I have been considering purchasing a used M59 which has EGR and as a Ford 6.0 diesel owner the EGR is a concern for me. The EGR cooler getting plugged with soot and then plugging the oil cooler and leading to overheated engines is what finally put the nail in the coffin of the Ford / Navistar relationship and there are still lawsuits pending.

I can tell you that at 240,000kms the third EGR cooler failed on my truck with plumes of white smoke out the tail pipe a clear indicator. At that point I was out of warranty and rather then spend $4,000 to have it replaced I spent considerably less and had it removed.

The only issue was that I installed software from SCT which gave me a performance boost and eliminated the check engine light because the EGR was deleted. There was no timing issue with the 6.0 engine. The net result is that I have put another 120,000kms on the truck since with no failure, significantly better performance (SCT plays a big part here) and instead of only getting 800kms out of a tank of fuel I now get almost 1,000kms out of a tank.

Rest assured that if I purchase the M59, the first thing to go will be the EGR system.

 

[greenrider1]

Put an exhaust temp gauge on and get a baseline temp range with the egr intact. Once you have a good baseline pull the egr and see what changes.
One thing to keep in mind, increasing the timing will reduce egt's on a gauge but increases the heat sink to the pistons/cylinders.

Yes, I plan on welding a bung to the exhaust and adding an EGT probe just after the turbo. It is such a short distance to the exhaust manifold that it should be pretty accurate. Might as well add a boost guage while I'm at it, just for giggles. I've done both to my Duramax, so why not the little Bota too? It's nice to keep an eye on things, especially when working an engine really hard.

 

[kuboman]

Yes, I plan on welding a bung to the exhaust and adding an EGT probe just after the turbo. It is such a short distance to the exhaust manifold that it should be pretty accurate. Might as well add a boost guage while I'm at it, just for giggles. I've done both to my Duramax, so why not the little Bota too? It's nice to keep an eye on things, especially when working an engine really hard.

Hope you keeps up to date on your mods. I put a boost gauge on mine. The most I can get is about 8 psi. I will be curious as to what your egt says.

 

[greenrider1]

Hope you keeps up to date on your mods. I put a boost gauge on mine. The most I can get is about 8 psi. I will be curious as to what your egt says.

Where did you attach the boost line? There's not much hose between the turbo outlet and the intake manifold. On my Duramax, I bought a nice aluminum manifold that has threaded ports. I just cut a section out of the silicone boost tubing and clamped it in. Pickup trucks are easy, because companies make anything and everything you can imagine for them. There's nothing really available for these CUT's yet. 8 psi doesn't seem like much on a diesel. I don't need any more hp, but it would be nice if someone would come out with ways to optimize fuel economy

 

[kuboman]

Where did you attach the boost line? There's not much hose between the turbo outlet and the intake manifold. On my Duramax, I bought a nice aluminum manifold that has threaded ports. I just cut a section out of the silicone boost tubing and clamped it in. Pickup trucks are easy, because companies make anything and everything you can imagine for them. There's nothing really available for these CUT's yet. 8 psi doesn't seem like much on a diesel. I don't need any more hp, but it would be nice if someone would come out with ways to optimize fuel economy

I disconnected the hose for the egr right at the intake manifold and ran a hose to my gauge that I mounted on the side of the console. I too thought the boost might be higher. I have thought about a boost controller that lets you adjust the boost pressure by adjusting the wastegate. Just have not done it yet. Trying to decide if it is worth it or not.

 

[wmonroe]

Does the turbo have a wastegate?

 

[kuboman]

Does the turbo have a wastegate?

Sure does!

 

[greenrider1]

I disconnected the hose for the egr right at the intake manifold and ran a hose to my gauge that I mounted on the side of the console. I too thought the boost might be higher. I have thought about a boost controller that lets you adjust the boost pressure by adjusting the wastegate. Just have not done it yet. Trying to decide if it is worth it or not.

Thanks, that's a good idea. I think you would definitely want an EGT guage if you start adding more boost. Not sure if there would be much to gain without adding fuel also? I think water/methanol injection would be a sweet setup. Lower EGT's, more power, better fuel economy. On cab models, you even already have the washer fluid tank!

Have you noticed any fuel economy/ performance difference since unhooking the pressure line to the EGR valve?