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12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

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  #1  
Old 05-20-2013, 10:03 AM
cummins Pride's Avatar
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shane doyle cummins12vman
   
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Default mac plug on 12v

iv been hearing that i can buy the 12 doller mac plug and put on the back of my pump to allow the shaft to moe farther back and forth and gain 10 to 20 hp does anyone on here done this or have any experience with doing this thanks

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  #2  
Old 05-20-2013, 10:49 AM
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its on the front of the pump. I will allow more rack travel for more fueling. Nice cheap upgrade.
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Old 05-20-2013, 11:14 AM
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its a 2095 rack plug. they were used on mack trucks that ran the p7100 injection hence the nick name "mack plug". it allows max fuel under max load. if you have a 215 pump with a 5 speed. they are pretty much useless because the rack is already allowed more travel. if not its an ok upgrade but there is some other adjustment that would need to be made to get the most out of it
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Old 05-20-2013, 11:17 AM
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Originally Posted by olsmokey View Post
its a 2095 rack plug. they were used on mack trucks that ran the p7100 injection hence the nick name "mack plug". it allows max fuel under max load. if you have a 215 pump with a 5 speed. they are pretty much useless because the rack is already allowed more travel. if not its an ok upgrade but there is some other adjustment that would need to be made to get the most out of it
what else would have to be done
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Old 05-20-2013, 11:21 AM
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grinding down the barrel on your afc foot. and replacing the washers or griding down the washers on your afc diaphram
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Old 05-20-2013, 11:26 AM
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Originally Posted by olsmokey View Post
grinding down the barrel on your afc foot. and replacing the washers or griding down the washers on your afc diaphram
and that has to be done if putting in mac plug
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Old 05-20-2013, 11:28 AM
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the foot needs to be done to allow for the extra travel the plug allows for. The washers are to help clear up some smoke. You could also do away with the afc all together.
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Old 05-20-2013, 11:35 AM
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Originally Posted by MillerBoyzDiesel View Post
the foot needs to be done to allow for the extra travel the plug allows for. The washers are to help clear up some smoke. You could also do away with the afc all together.
how hard is it to grind the foot
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Old 05-20-2013, 11:44 AM
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its really not to hard. i would grind the barrel instead of the foot tho. take about .090 to .125 off the end of the barrel and your good to go.
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  #10  
Old 05-20-2013, 11:53 AM
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Originally Posted by olsmokey View Post
its really not to hard. i would grind the barrel instead of the foot tho. take about .090 to .125 off the end of the barrel and your good to go.
dump question but will i be able to notice a differents in power after doing all of this right
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