Author Topic: 2002 cummins lilbb install  (Read 241 times)

Offline Off-road

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on: May 19, 2018, 08:53:42 AM
Gents-  trying to install the lilbb on my 24v cummins, and I have questions. 

Is there a how to anywhere on what the different I/o’s are supposed to hook into? 

I get a few of these like power ground, etc.  but, what all do I need to install to what? 



Offline hakcenter

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Reply #1 on: May 19, 2018, 09:54:18 AM
At the bare minimum, you need a 12v key on power source for the lbb, and a suitable ground.

To the turbo you need a relay with a 15A fuse. When key on, relay kicks power over to the turbo. The LBB is not a suitable power source for the turbo.

You'll need the canbus wires from the turbo to the LBB connected correctly (canH to canH / canL to canL) and the VR sensor on the turbo will need to be connected. Everything else is gingerbread depending on what you want to do.

AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.



Offline Off-road

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Reply #2 on: May 19, 2018, 09:18:34 PM
Can I use the I/o’s to monitor and use the boost and load of the engine to determine vane position and adjust it accordingly or is that over rated?



Offline hakcenter

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Reply #3 on: May 21, 2018, 07:32:42 AM
Don't know how you would calculate load, but you certainly can integrate as much 5v stuff as you want.

Just remember the common code doesn't have any extra processing in it besides just showing you how count on the ISR spare pin. Adding the sensors to the code will be task :)

AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.



Offline Chewy1576

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Reply #4 on: May 24, 2018, 07:11:55 PM
What gauge wire do you recommend for actuator 12v supply and the ground?

I'm working on integrating boost pressure and EGT sensors, but only for display purposes right now. In the future I may let them influence commanded vane position, but only as a failsafe for overboost or excessive EGT conditions. Main vane control will still be a function of turbine shaft speed.



Offline hakcenter

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Reply #5 on: May 25, 2018, 09:33:09 AM
12awg is fine, the actuator uses around 10A max.

I wouldn't be too concerned with an EGT failsafe since you cannot control fuel with the turbo, and opening it up more will probably just reduce compressor flow and make the situation worse. Definitely something worth monitoring just not something to integrate into the controller :)

AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.



Offline Chewy1576

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Reply #6 on: May 25, 2018, 09:52:50 AM
I will leave that function out then. It sounded useful in theory, but if it won’t work in practice then I won’t worry about it.