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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #11  
Old 12-15-2012, 07:53 PM
11hemisport 11hemisport is offline
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Not that I n tell. It only had a HS setting for both ac on and off

Not sure if the tyc is two speed, or trinity only allows 1.
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  #12  
Old 12-16-2012, 11:54 AM
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Pretty sure the fan is a two speed fan. But I assume the diablo is like the superchips, only allowing access to one speed(which I assume is high).
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  #13  
Old 12-16-2012, 04:23 PM
11hemisport 11hemisport is offline
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Set temps at 211 as recommended. Seems to be fine around town in stop and go traffic.
My ect reached 207, but quickly dropped back down under 200

I also asked about the no low speed fan setting question on the trinity forum.
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  #14  
Old 12-18-2012, 10:48 AM
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Quote:
Originally Posted by snrusnak View Post
But just keep in mind you want to have the efan running as little as possible, because if it is running then it is using hp(via the alternator). It's not exact, but having the efan run you can say you are using roughly the same hp as the clutch fan being engaged. The benefit of this mod is to have the fan not running.
Can you explain this comment please? I understand the benefit of the efan over the stocker, but unlike the A/C clutch/compressor, the alternator is ALWAYS running and I've never seen where an electrical load on it directly relates to an appreciable and measurable loss in HP/torque...
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Old 12-18-2012, 01:19 PM
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I believe that the magnetic force between the rotor and stator increases within the alternator, depending on the current draw. More power ie large electric fan = more force to spin the pulley.
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Old 12-18-2012, 02:13 PM
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interesting logic, now that you guys have pointed it out and now that it's winter..I'll raise my setting on the efan controller to above the 180 temp... my controller also has a setting for 10 percent always on, I do this because I've run into a time or 2 where my efan stopped working and I didn't know it til my gauge red lined and gave me a ding warning.. now i know from the gitgo whether my fan is working...
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  #17  
Old 12-18-2012, 10:38 PM
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Quote:
Can you explain this comment please? I understand the benefit of the efan over the stocker, but unlike the A/C clutch/compressor, the alternator is ALWAYS running and I've never seen where an electrical load on it directly relates to an appreciable and measurable loss in HP/torque...
This is pretty much spot on:
Quote:
I believe that the magnetic force between the rotor and stator increases within the alternator, depending on the current draw. More power ie large electric fan = more force to spin the pulley.
Most people fail to realize(or simply refuse to realize) that there is a correlation between engine load and electrical load, and that electricity is not free. If electricity were free, then we would just strap a powerful electric motor under the hood and have a free power source. But sadly this isn't the case.

Basically, an alternator spins freely when not energized(not under any load). However, when an alternator is energized(has a load on it) it acts like an electromagnet and there is resistance. The amount of resistance depends on the load. That's pretty much it as far as how it works.

You can relate this to hp...keep in mind I am not an electrical engineer, but am nearly positive this is correct:

Say you have a 150amp alternator at full load.
A typical alternator puts out 14.4volts (roughly).
150amp * 14.4volts = 2160watts.
2160watts / 745.7 = 2.9hp.
Figure anywhere from 10%-50% efficiency, lets say 25%): 2.9hp * 1.25 = 3.6hp

So basically, you use 3.6hp. Keeping in mind this is at FULL LOAD. Your alternator is nearly never at full load. A stereo head unit may use ~20amps, an efan may use ~30amps, headlights, etc, etc. So this is the reason you see vehicles today with higher amp alternators(more electronics to run).

Hope this helps...
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Last edited by snrusnak; 12-18-2012 at 10:42 PM.
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  #18  
Old 12-19-2012, 07:02 PM
11hemisport 11hemisport is offline
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Just as an update, my fan has not came on once yet. Have been driving hard in town and is still hasn't reached the 211 temp the trinity is set at.

Great mod so far
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  #19  
Old 12-20-2012, 10:13 AM
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That's an excellent explanation snrusnak. I understand and appreciate the benefit of the efan versus the stocker but when it comes to increasing or freeing up HP/torque it's nice to have more information than just butt dynos!
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