3G questions
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Elder User
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3G questions
Hey guys I got a mark vii electric fan and have been told i need to upgrade to the 3g. After doing some research I see that it is probbly a good idea due to the old alternator being a fire hazzard. My question is I see some 92 trucks came with 3g how would i know if i have one? Also I wanted to know what is the best size alternator for me to use? The 130 is pricey but I also hear its the best one to use. Any info that can be passed my way would be greatly appreciated
Fleet Owner
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From: Easton,Ks
If it has a plug on the side with 3 wires with 2 of them larger black ones it is a 2G.
If all the wiring is in the back then it is a 3G.
This link will give you more information on it:
http://oldfuelinjection.com/?p=63
/
If all the wiring is in the back then it is a 3G.
This link will give you more information on it:
http://oldfuelinjection.com/?p=63
/
New User
Joined: Jul 2011
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I did a 3G upgrade to my 88 f150. Wiring it up was a snap. I had to do a little fabricating to mount the new alt in the stock alt bracket, but wasn't too bad. I got a high output alt (160 amp!) from RJM Injection.
RJM Injection Tech — Alternators
With alt and pulley it came to around $150, which is pretty fair considering it is not a rebuilt and you can choose dif pulleys and clocking.
RJM Injection Tech — Alternators
With alt and pulley it came to around $150, which is pretty fair considering it is not a rebuilt and you can choose dif pulleys and clocking.
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Elder User
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So what is a good alternator size for running an electric fan? the rjm site has a 160 for $130
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New User
Joined: Jul 2011
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Anything over stock (65 amp) would do the trick. Just remember the alternator is only as good as the battery its charging. I prefer optima red top, but I am running a plow which constantly drains the battery. I wouldn't expect the electric fan to draw anymore than 100 amps! So as long as you have a sufficient alt with bigger guage charge wire and a good working battery, you should be good...
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