Aeromotive Stealth 340 Pump and Hanger - 18638

[cv2065]

In my last build, I used the Pro M-Racing Hanger with an Aeromotive 340 pump. Never had any issues. The only thing I didn't like about that setup was having to cut the plug off of the Aeromotive pump and re-attach to the hanger with fuel resistant butt connectors, and it didn't seem like the M-Racing Hanger fit all that well into the tank hole, as it needed to be shaved down a bit. Definitely took some finesse.

Anyone use this Aeromotive Hanger? Looks like it eliminates those concerns. Although it does take two additional 6AN fittings at the top where the M-Racing hanger already had them plumbed. Here it is on Amazon:

https://www.amazon.com/Aeromotive-18638-Stealth-Hanger-Mustang/dp/B07MZLV7Y6/ref=sr_1_5?crid=16956EFKODJ8V&keywords=aeromotive+stealth+340&qid=1687039241&sprefix=%2Caps%2C125&sr=8-5&ufe=app_do%3Aamzn1.fos.f5122f16-c3e8-4386-bf32-63e904010ad0

[slarson]

I believe that's the one I am using in my build. I haven't made it to first start yet, but the fuel pump is installed and plumbed. It installed/fit well into the tank. I don't remember having any issues at all.
https://thefactoryfiveforum.com/attachment.php?attachmentid=172386&d=1663029809

[cv2065]

Thanks for the feedback. I think I'll use this one this time around.

[scrubs]

I used that set up with their deluxe wiring kit. Have 10 miles in kart stage, no issues.

[Fman]

In my last build, I used the Pro M-Racing Hanger with an Aeromotive 340 pump. Never had any issues. The only thing I didn't like about that setup was having to cut the plug off of the Aeromotive pump and re-attach to the hanger with fuel resistant butt connectors, and it didn't seem like the M-Racing Hanger fit all that well into the tank hole, as it needed to be shaved down a bit. Definitely took some finesse.

Anyone use this Aeromotive Hanger? Looks like it eliminates those concerns. Although it does take two additional 6AN fittings at the top where the M-Racing hanger already had them plumbed. Here it is on Amazon:

https://www.amazon.com/Aeromotive-18638-Stealth-Hanger-Mustang/dp/B07MZLV7Y6/ref=sr_1_5?crid=16956EFKODJ8V&keywords=aeromotive+stealth+340&qid=1687039241&sprefix=%2Caps%2C125&sr=8-5&ufe=app_do%3Aamzn1.fos.f5122f16-c3e8-4386-bf32-63e904010ad0

I am using this exact set up, 5400 miles on the car now and zero issues.

[cv2065]

I just read in the Aeromotive instructions that if you are running a carb, then your fuel lines should be 8AN? EFI can use 6AN or 8AN. Does that sound right? I believe 6AN is equivalent to a 3/8" line, which should be plenty for a carb, and what I had in my last build. Why would it be asking for this in a carb application? Wouldn't that be equivalent to 1/2" fuel lines?

[Blitzboy54]

I used this. Very similar to the Pro M but cost less. Has worked great.


https://www.highflowfuel.com/quantum-an-fitting-fuel-pump-hanger-8an-6an-for-1986-1997-ford-mustang-without-pump/

[Its Bruce]

I just read in the Aeromotive instructions that if you are running a carb, then your fuel lines should be 8AN? EFI can use 6AN or 8AN. Does that sound right? I believe 6AN is equivalent to a 3/8" line, which should be plenty for a carb, and what I had in my last build. Why would it be asking for this in a carb application? Wouldn't that be equivalent to 1/2" fuel lines?

I believe the issue is the pressure drop through the fuel line. With EFI, a minor pressure drop at 42-58psi is largely insignificant. With a carb, a minor pressure drop at 3-6psi becomes much more significant. As such, you'll want to minimize the amount of pressure drop (increase line size) to prevent the pump from underperforming in terms of flow rate. My guess is that Aeromotive has determined, in general terms, that 8AN is required to maintain their HP ratings because of this.

[cv2065]

I believe the issue is the pressure drop through the fuel line. With EFI, a minor pressure drop at 42-58psi is largely insignificant. With a carb, a minor pressure drop at 3-6psi becomes much more significant. As such, you'll want to minimize the amount of pressure drop (increase line size) to prevent the pump from underperforming in terms of flow rate. My guess is that Aeromotive has determined, in general terms, that 8AN is required to maintain their HP ratings because of this.

Thanks for that. I spoke to Aeromotive this afternoon. They recommended an EFI to carb regulator (13220) and said 6AN lines to and from would be fine. I asked about the 8AN in the instructions and he stated that with that regulator, it wouldn’t be an issue to stay with 6AN. Still not a clear answer. I’ll probably just go with 1/2” lines. I think a carb’d 550HP engine is right on the line between 3/8 and 1/2”.