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Old 02-14-2017, 08:52 PM   #1
Mini-Skoolie
 
Join Date: Feb 2017
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Year: 2002
Chassis: Saf-T-Liner MVP EF
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2002 Thomas 5.9 cummins power increase

Hi all, I spent the summer in my bus which I purchased in the spring. It is a 2002 Thomas built coach on a freightliner chassis, 5.9 ISB190 Cummins, with an at 545 auto.

The bus treated me quite well in 10,000km I put on her, save for a shredded drive belt and a leaky #5 injector line, a new connector tube and injector line solved it.

This spring I'm planning on doing a better conversion, to set it up for music festivals and road tripping.

Now to the point, like anything, it could use a little more power, are there any ways to increase the power of these beasts?

Can I fit a manual boost controller to the wastegate actuator? can I fool the MAP sensor into fueling more? Up rated RV injectors?

I have a digital boost and EGT gauge, but haven't fitted it, not 100 percent sure where to mount the sensors.

Thanks in advance
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Old 02-14-2017, 09:24 PM   #2
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A mechanical 5.9 with an inline pump can be dialed up with just the fuel screw. Pick up 15 to 20 ponies easily. Electronic engines are much more complicated.
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Old 02-14-2017, 09:25 PM   #3
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I should add it's a VP44 electronically controlled injection pump
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Old 02-14-2017, 09:55 PM   #4
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With the VP44, you'll most likely need to change out injector tips in order to flow more fuel.

Common rail is a whole different story. You just plug a laptop into it and turn up the power.
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Old 02-15-2017, 06:54 AM   #5
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You can turn the juice up on those very easy, its all about fuel and air. You're best bet would be to get on a diesel forum that's just for Cummins. But i will warn you, We diesel guys on the forums are total A-holes about opinions and such! There is not a lot of "nice guys" like here on Skoolie.... Look for stuff to heat up a 24 valve VP44. Tons of stuff out there.
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Old 02-15-2017, 06:57 AM   #6
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The AT545 is not going to handle a ton of extra power.
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Old 02-15-2017, 07:03 AM   #7
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Quote:
Originally Posted by WIbluebird View Post
The AT545 is not going to handle a ton of extra power.
He DOES bring a solid point.....
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Old 02-15-2017, 09:35 AM   #8
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Join Date: Feb 2017
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Quote:
Originally Posted by SDR76 View Post
You can turn the juice up on those very easy, its all about fuel and air. You're best bet would be to get on a diesel forum that's just for Cummins. But i will warn you, We diesel guys on the forums are total A-holes about opinions and such! There is not a lot of "nice guys" like here on Skoolie.... Look for stuff to heat up a 24 valve VP44. Tons of stuff out there.
I've looked around a decent amount, and this being the industrial engine, it doesn't have any tuners available ad it's Dodge vp44 brother.

So can the industrial vp44 flow enough fuel through larger injectors/tips if I can fool the boost?

And with regards to the AT545 it's supposed to he able to hold 300hp.
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Old 02-15-2017, 09:47 AM   #9
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in my opinion the 545 is rated conservativelty on its labels.. you do need to keep its revs up or it will burn..

I ran a 545 behind a 454 gasser that was built..

the 545 has low line pressure until you get its revs up at least 1800 or above.. so if you turn up an engine to prodice more low RPM torque oyu may have an issue with slipping it off the line..

-Christopher
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Old 02-15-2017, 09:49 AM   #10
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Quote:
Originally Posted by Krazyistkarl View Post

So can the industrial vp44 flow enough fuel through larger injectors/tips if I can fool the boost?

And with regards to the AT545 it's supposed to he able to hold 300hp.

Yes. But make sure your lift pump is providing sufficient fuel or you'll burn up your injection pump. Best way is to add a fuel pressure gauge, though a low pressure light will suffice.

For the AT545, it would be a good idea to have a good transmission temperature gauge.
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