T300 EGT Limits

[Dameon]

Now that my T300 is well beyond warranty, I'm ready to crank up the fuel pressure on the injector pump. Get me some "free" horsepower. In doing so, I'd rather not nuke my engine, so I'm turning to the masses (here) to get some insight and guidelines.

1) I am a HUGE fan of being aware of what my engine is doing. If I built a CTL, I'd have gauges for every temperature and pressure on the unit. As such, I intend to install an EGT sensor in the header and mount a gauge in the cabin. Same as I've done with diesel trucks. Trucks typically prefer less than 1300* on EGT's. Is a Bobcat similar/same? Any tips for where to drill the header for the EGT sensor? How many turns on the pressure screw to get maximum performance without black smoke? I was going to crank it until I see smoke and then back it off, but if someone has done the work, I'll start with that.

2) I would like a gauge for turbo boost. What boost levels does the T300 reach? Will a 15psi gauge give me good clarity? Any need to care about vacuum? Since the engine typically runs at a constant RPM (not like a car/truck with shifting gears and such), vacuum may not be a concern. A gauge like this might be nice as I can put EGT, boost and a couple other things in a single gauge...

Thoughts?

 

[Tazza]

Would EGT readings really be needed if you aren't going to be putting lots of boost into it? That is the other issue, how much boost can you safely put into it? From stock, i didn't think they had much, i thought it was only a few PSI.
The other issue is can the pump provide enough fuel? If you are only adding a little more boost, i see no issue, just don't go crazy.
I'd like to hear how you go with this, it would be good to see dyno data on it, but that simply isn't going to happen

 

[Hotrod1830]

Would EGT readings really be needed if you aren't going to be putting lots of boost into it? That is the other issue, how much boost can you safely put into it? From stock, i didn't think they had much, i thought it was only a few PSI.
The other issue is can the pump provide enough fuel? If you are only adding a little more boost, i see no issue, just don't go crazy.
I'd like to hear how you go with this, it would be good to see dyno data on it, but that simply isn't going to happen

If you have been turning up the wick on trucks, you already know that some of them wont handle it and you cause more headache than it's worth. My suggestion, leave it alone and use/ enjoy it.

 

[reaperman]

I'm with hotrod, I wouldn't mess with it. Where are you planning on using the extra power? With skidsteers, traction is the name of the game. And that issue is already solve with tracks vs tires. You stock engine has more than enough ponies to spin the tracks. If more hydro power is needed than a high flow machine would be in order.

 

[Dameon]

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[Dameon]

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Arrg... this forum software is not very friendly or resilient. In order to post a reply, I have to click "post reply", which brings up the text editor (after scrolling past 4 or more spam banners), but the main area for entering my reply won't let me enter text. I can type in the "subject" box, but not the "message" box. If I click in the message box, I don't see the cursor vertical line. If I click in the message box and just start entering text (thinking maybe the cursor just isn't showing), nothing happens. I have to click "preview>", then scroll past banners, click "Back to Edit Mode
Anyway, I am updating a mirror thread here

Updates will be more consistent and more timely as that forum seems to work better.

Back on topic...

Tazza, knowing EGT levels may not be critical due to, as you pointed out, small increases in PSI. I would just like knowing.

I expected factory PSI was below 5, but the gauges available seem to be 0-5, 0-15 and 0-30+. I figured 0-5 would be too little and 0-30 wouldn't give me much clarity (is that 10 psi or 15 psi?).

The pump will be working a little harder to maintain the higher fuel pressure. That's one of the concerns I have. Can it maintain this extra workload without premature failure? Is it already working at its 90 percentile of maximum?

I have considered dyno testing. The dynos I have access to are all wheel/drum dynos. That wouldn't work for a CTL (maybe a skid steer?). I need a dyno I can drive with a belt. I could loop the belt around the engine pulley with the back door open and get a number. With all the misinformation running around concerning the numbers with the T300/T320, this would end a lot of unfounded tales.

 

[Dameon]

Arrg... this forum software is not very friendly or resilient. In order to post a reply, I have to click "post reply", which brings up the text editor (after scrolling past 4 or more spam banners), but the main area for entering my reply won't let me enter text. I can type in the "subject" box, but not the "message" box. If I click in the message box, I don't see the cursor vertical line. If I click in the message box and just start entering text (thinking maybe the cursor just isn't showing), nothing happens. I have to click "preview>", then scroll past banners, click "Back to Edit Mode
Anyway, I am updating a mirror thread here

Updates will be more consistent and more timely as that forum seems to work better.

Back on topic...

Tazza, knowing EGT levels may not be critical due to, as you pointed out, small increases in PSI. I would just like knowing.

I expected factory PSI was below 5, but the gauges available seem to be 0-5, 0-15 and 0-30+. I figured 0-5 would be too little and 0-30 wouldn't give me much clarity (is that 10 psi or 15 psi?).

The pump will be working a little harder to maintain the higher fuel pressure. That's one of the concerns I have. Can it maintain this extra workload without premature failure? Is it already working at its 90 percentile of maximum?

I have considered dyno testing. The dynos I have access to are all wheel/drum dynos. That wouldn't work for a CTL (maybe a skid steer?). I need a dyno I can drive with a belt. I could loop the belt around the engine pulley with the back door open and get a number. With all the misinformation running around concerning the numbers with the T300/T320, this would end a lot of unfounded tales.

My reasoning behind even considering this modification is something I've noticed in using my machine for mowing.

I built a 3-point PTO attachment that drives most standard tractor implements. I use it for a rotary cutter and a flail mower primarily. I also use it for an auger and a box blade. When using the mowing attachments, if I'm going up a slight incline (is there any other type in LA?) and I'm lifting/tilting the attachment, there is a slightly noticeable change in engine pitch. More so with the rotary cutter (heavier I guess) than the flail mower.

May seem nit-picky, but a couple extra PSI may help and I really don't think it will hurt anything if done correctly.

 

[Tazza]

My reasoning behind even considering this modification is something I've noticed in using my machine for mowing.

I built a 3-point PTO attachment that drives most standard tractor implements. I use it for a rotary cutter and a flail mower primarily. I also use it for an auger and a box blade. When using the mowing attachments, if I'm going up a slight incline (is there any other type in LA?) and I'm lifting/tilting the attachment, there is a slightly noticeable change in engine pitch. More so with the rotary cutter (heavier I guess) than the flail mower.

May seem nit-picky, but a couple extra PSI may help and I really don't think it will hurt anything if done correctly.

A few extra HP would help with that, you really notice the power drain when driving and lifting/tilting.
I'd like to think you would not damage the pump trying to push more fuel into the engine. They are just pumps, they can only run to 100%, then you will not be able to put more fuel in to get more power.