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Old 03-10-2010, 09:03 PM   #1
maj
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After market upgrades for 5.9

Has anyone seen the upgrades from banks power? I like the packages.
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Old 03-11-2010, 10:41 PM   #2
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Re: After market upgrades for 5.9

Yes, but the trouble is most of those packages are bundled with premade tubing, and none of it will work in the bus, as it's made for a Dodge Ram. Are you good with welding seemingly endless stainless tubing in bizarre angles? I would love some more power out of our bus, but the cost rivals the cost of another bus.
You could get a shop to fabricate the entire thing, but again, it's cost prohibitive in most cases. Will the benefit really be worth it? I have a hard time believing it.
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Old 03-11-2010, 11:18 PM   #3
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Re: After market upgrades for 5.9

What transmission does your bus have? Most AT545's are running at about their limit in a fullsize bus with ~200 hp to it. The MT643 has a much higher threshold for adding power. There are 320101919 Dodge truck forums out there with just about any information you would need for upgrading your Cummins, many of which are pretty low buck.
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Old 03-29-2010, 06:08 PM   #4
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Re: After market upgrades for 5.9

The AT545 is pretty much at its limit in a big bus...it's a delivery truck transmission that has essentially a heavy-duty TH400 torque converter. THAT is the weak link...it's not hard to cook a 545 with turned-up power. I wouldn't go past 200HP with an AT545.

(That's one reason I got a bus with a DT466 instead of a 5.9 Cummins or a DT360.)
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Old 04-17-2010, 10:58 PM   #5
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Re: After market upgrades for 5.9

Quote:
Originally Posted by thanatos
The spring kit, a fuel plate and an EGT guage will all run you about 400.00 retail. Install will vary,but if you are in new england, I can hook you up with a couple of fellows who will treat you right. It only takes about two hours for the whole deal...maybe three.

If you do it, you will fall in love with your bus.


Also, are you folks aware of how much more you can get out of your cummins just by adding a cooler to it? If your turbo line goes directly to your intake, you can get a whole new engine just by adding an aftercooler...with zero strain on the engine...in fact, it is a lot better for the motor.
Cool, great info! Can you help a brother out a bit, and maybe help me out with where to find the spring kit, fuel plate? Unfortunately, I am not in NE area.

And I would love more info on adding an aftercooler too. Anything I can do, I am having a lot of trouble getting on the freeway, it's been dangerous a time or two going so slow getting on.
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Old 04-18-2010, 03:01 PM   #6
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Re: After market upgrades for 5.9

All the power is great, but EGT will get hot really fast. Besides the trans isn't up to the power, that already got covered. On that same line, the added rpm of the gov spring kit is your friend with that slushy trans. If you want one that can take what you throw at it, upgrade to an Allison MD3060.
In reality, you can make great power by just sliding your fuel plate forward, considering it has the Bosch P-pump, not the VE rotary pump from the older ones. If it's got the rotary pump, and with no intercooler it probably is, there's a few freebie mods to that one too. The first thing is to do the gov spring(around $20), then adjust fuel screw, and rotate the diaphram. It would be a really good idea to have an intercooler, and one from a 91-93 Dodge may just be the right fit. By all means, get a pyrometer too!
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Old 06-05-2010, 12:52 AM   #7
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Re: After market upgrades for 5.9


I have a concern about increasing the RPMs.

Way back decades ago when I first learned about engines, I was told not to increase the maximum RPMs on a used engine, because there will be wear-ridges around the cylinder walls (from the piston rings), and if you increase the RPMs the conecting rods will stretch just a tiny bit more than they used to (everything flexes under load -- it is ony a matter of how much) and the top rings will break against the old wear-ridges.

Thoughts? Knowledge?
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Old 06-05-2010, 07:22 AM   #8
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Re: After market upgrades for 5.9

Bugger it is my thoughts.
For all the trouble and expense one would go to in order to increase "on ramp speed", how much difference could it REALLY make. This is a seriously heavy vehicle, as many people have said the trans is not really up to the job once you start pouring more juice into it.
Besides, who is it for? I still get where I am going, and if the people behind me want to chip into a fund to get me a faster bus, I am all for it. I will put a jar on the passing side, and as the pass they can stuff it with bills with one hand, and use the other to give me the universal signal for "you suck".

I can even paste a picture of the bus I really want (a Neoplan, the one I can put motorcycles under) to help them visualize it.
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Old 06-05-2010, 12:05 PM   #9
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Re: After market upgrades for 5.9


The Allison MT643 is rated for 250 Horse Power, 640 Pound Feet of torque, and 73.280 Pounds of gross vehicle weight. So yes, we would not want to exceed 250 HP. Above that, you would need an HT 700-series tranny.

My only need for more power and speed is when climbing hills. Millicent does 60 MPH on level ground, with the factory governor setting, and above that fuel consumption skyrockets.

Now: Before spending money on fancy upgrades, make sure your foot feed (accelerator pedal) really opens the pump all the way to full power. On Millicent, the pedal itself was bent to where I had only about 3/4 power. I straightened it, and that was like adding an afterburner. But now it's bending again. The linkage is also worn out and very sloppy.

Also, I want to review how the return springs are mounted, to eliminate the bending and minimize wear. When I get that finalized, I'll post on the Millicent thread.
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Old 06-05-2010, 12:13 PM   #10
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Re: After market upgrades for 5.9

Elliott, it's bending because you have a lead foot.
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