Hi everyone, I'm new to this forum.
I've been reading the thread about the new Airtex pump (rocks!) One of you pointed out that when mounting to the chassis (as I plan to do), the pump should be located as low as possible to maximize the siphon effect from the tank.
Here's the thing; I have a Carter pump, and I was wondering if there would be any harm in mounting it "rotor end down", thus enabling me to get the pump as low as possible.

Thanks in advance for your input.

 

Other than some plumbing issues I don't think it's going to have any negative effect. Then again, moving it in the first place will probably yield negligible results since flipping it will put the rotor maybe an inch or two lower?

Also, I think you're referring to the airdog system, not the airtex.

 

"AIRTEX" is the brand of pump sold at O'Reilly Auto Parts Stores, are you sure you dont mean airdog?

 

It's a pump, it pulls the fuel from the tank. Mountin it down low for the "siphon effect" isn't gonna do anything. Just mount it on the frame rail and go.

 

Welcome to the club!
I think what they mean is, mount it so that the pump is below the typical fuel level in the tank so that it does not have to pull the fuel up.
In my personal opinion this is not a critical thing. We are not talking feet of lifting, and inches can not possibly matter.
-P

 

i wouldn't flip it upside down like you were talking about. just mount it on the frame and you should be ok. thats all i did with mine.

 

Thanks for the replies folks.

Just to clear up any confusion, here's the thread I was referring to:

https://www.dieseltruckresource.com/...d.php?t=183205

The main concern and reason (as I understand it) for wanting to mount the pump as low as possible, and have a siphon effect (to the pump) with the least amount of fuel in the tank is to eliminate premature pump failure due to fuel starvation.

As far as I can tell, the Airtex pump (E7153) differs from the Carter in that the Airtex is an inline design, making the poster's advice (in the thread I linked) to mount the pump as low as possible a simple thing to follow.
I'll certainly be checking for further feedback on the Airtex unit since it's considerably less expensive than the Carter.

As for mounting the Carter "rotor end down", my main concern is that the pump may not have been designed with that arrangement in mind, and therefore causing an unanticipated thrust load on the motor and rotor/vanes.
I'd talk to someone at Carter about this, but as many of you probably know already, their tech advice/customer service is notoriously (and historically) non-chalant and contemptuous.
If the Airtex works out, you can guess that that's where I'll be heading in the future.