fuel pump

[no mufflers]

has any one used or thought of using one on an IDI? i have one on my cummins and works well, has a regulator on it. im having troubles with my machinical lift pump and i could turn this down to 8 or so psi and it should work fine.

https://airdogliftpumps.com/product...cummins-factory-raptor-replacement-pump-5-9l/

 

[Thewespaul]

I have a couple customers running these, works great

 

[no mufflers]

what psi you setting them at and mounting locations? i keep seeing others run the low psi pumps and it seems they supply just enough fuel but kinda on the edge.

 

[Thewespaul]

6 psi is where I would set it, on the frame in front of the selector valve there’s some space. The one I saw in person he had it mounted on the outside of the frame to make filter changes easier

 

[no mufflers]

i have no batteries in the engine compartment so was kinda thinking in that area. guess ill order one and get started so i can start driving again.

what are y'all using for a block off plate?

 

[Thewespaul]

BBC block off plate, grind off a bit off the top to clear the rise in the casting, i believe these are pusher pumps so you need them mounted low as possible

 

[no mufflers]

ok gotcha. i was kinda thinking the same thing.

 

[laserjock]

There’s a specific bbc plate that fits without modification. Watch and make sure it sets flat. The block casting can get I. The way and it will never seal if you get the wrong one.

 

[chillman88]

@tjsea is running something like that but I'm not sure which brand.

 

[laserjock]

@tjsea is running something like that but I'm not sure which brand.

He’s running a FASS and right now he’s not a fan.

 

[tjsea]

Yep, I have an older FASS setup that was originally for a first gen dodge. I've been struggling with it loosing it's prime, but other than that it works well. I got this one cheap so thats why I have a FASS. If I was to do it again I would have either went with an Airdog for a duramax and adjusted the pressure down, or gone with a superduty pump and installed a bypass regulator to keep pressure down. Just curious, are you still running 2 tanks? If so I was told the selector valve was too restrictive for a FASS or Airdog, but the superduty pump is fine to use with the selector. I don't have any experience with the raptor pumps, maybe they are fine to use with the selector valve. Take a look at what the obs guys are using.

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[Thewespaul]

@tjsea do you have a check valve in your system?

 

[tjsea]

@tjsea do you have a check valve in your system?

There is one in the pump itself and it was replaced when the motor seal was leaking. The seal was leaking from sitting many years before being installed on a truck. I sent the motor out to FASS and they resealed it for me.

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[Thewespaul]

Hmm, should be fine then. Still having priming issues after the reseal?

 

[tjsea]

@Thewespaul yep, and totally randomly too. Sometimes it won't do it for a week and the next time it will after having it shut off to fill it with fuel. I'm thinking it might be my adapter fitting I'm using at the fuel sending unit. A friend said he had some issues with the quick connect Russell fittings with the plastic clip before. He switched to the thread in Russell adapter fittings and it's since been fine. I just haven't had a chance to pull it all apart and check what's leaking yet. Other than that the FASS lift pump works well, just not as easy to adjust pressure as the newer Airdogs. It's a bit of a pain playing with springs and fittings to get the right combo for a certain pressure.

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