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Pump relay question and banjo fitting drilling specs

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I'm planning on doing the pusher pump install in a couple of weeks and have a question about what relay to use. I have assisted in two Carter pump installs (one an Enterprise kit and the other a Carter P4600Hp from Summit). The BG relay from Summit is about $20. I can get a relay from Radio Shack for $6. Is the RS relay up to the task of continuous duty? Does the lift pump, once the truck is started, run all of the time or does it cycle on and off? TIA



Passing this along.

I got some of Ray's banjo bolts back when he sold them direct to TDR members. I installed them shortly after recieving them, but did not drill out the banjo fittings at the time. Recently I noticed when pulling a 5-6K trailer that the FP would go down to about 1 psi under WOT. After helping some other members w/ pusher pump installs and drilling out their banjo fittings, I thought it was about time to do my own. Well, there is a huge difference. Now, FP won't go much below 5 psi. If your not sure what I'm talking about, the fittings in question are in the line from the lift pump to the filter housing. These are what the banjo bolts, bolt thru. I just stuck them in a vise and drilled them out to . 199" (#8) drill bit. Although 13/64" (. 203") is pretty close. I did drill them out w/ 3/16" (. 187") first and then #8. I used a cordless drill this time and it was much easier that doing it on a drill press. The bit will self align while drilling. Mopar-muscle told me about it, I just didn't do it at the time. (Actually, I didn't understand what he was referring to at the time. ) I think Bill K. mentioned it to him. Just wanted to give credit where credit is due.
 
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I used a 30 amp relay from a local electronics shop, it's on a 20a fuse and it's never blown the fuse. 40,000 miles and 8 months later it's still working great. Once the truck is started the lift pump runs continuously. I went with the 30a fuse for a little bit of overkill, since the 20a fuse hasn't blown I have at a minimum a 50% cushion on the relay. I'd go with the Radio Shack relay and just go with one that's rated for 30a. JMHO
 
Thanks Steve,

The 30 amp relay is what I have. Just wanted to be sure the RS relay was up to the job.

BTW, Your write up on pusher pumps sure came in handy when I helped a fellow member install his Enterprise kit. No instructions came w/ the kit. Neither of us knew what the hieroglyphics on the relay meant either. LOL Too bad we didn't have the Cummins pigtail either. Scotchlocking the relay trigger was the hardest part of the job.

Tom
 
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Tom

Let me know when you are doing this project and I will try to get down and give a hand. Will be doing all that soon myself. I hope to et a pump ordered this week along with some Rancho 9000's from Summit. Clutch is going in Tuesday.

Larry
 
the relay you installed on my truck is doing just fine:)

go with the radio shack relay.



tmacc,,you da bj bolt drilling man:D

tom and larry,,you need another set of hands?? let me know
 
Soon as Wiredawg gets his FP gauges, we'll schedule a session. Thanks, Don, Larry. The more the merrier. Don, did I see you post something about Bambi jerky? LOL

Oo.
 
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