Guys,

One of my winter projects is to eliminate the fuel pump whine from the Weldon I bought used during the rebuild last year. The CFO can’t stand it; says she can hear it from the ramp. Not gonna lie, it IS annoying. Not sure which model it is, but it’s the one they built for Merc for their 1075 and 1200 SCI engines. It came cheap.

I’m looking at THIS ONE, but I’m wondering about the 6AN outlet. I’ve made sure I’ve got 8AN throughout, and, honestly, I’m curious why they would build it with an 8AN inlet and a 6AN outlet. But I do understand that 100GPH is 100GPH.

I’m also looking at THIS ONE, but I struggle with more than double the price of the first one, given the same HP support. But it does have 8AN inlet AND outlet, FWIW.

For those not familiar…. Engine is a rebuilt 496, now 503ci, M1 ProCharger pulleyed to ~6PSI, Raylar BP211 cam. Holley HP ECM. Would like to think we are well north of 600HP.

If there are others that will fit the bill, I’m all ears. If there’s a reason I shouldn’t be concerned about the 6AN outlet of the less expensive unit, enlighten me.

Thanks. Brad.

There are so many variables that are available for electric. I bought the Aeromotive A1000 Marine, now re-thinking about the 11211 SS marine T style. My main concern is the amount of fuel the A1000 will be spitting back into the tank and the noise it will likely make. The 11211 is less volume, lower pressure and I may be able to deadhead or flow into the water separator, and it supports 750HP. I am pushing 630. What did on my 32 Coupe, was mount the small electric pump on some rubber padding and it is pretty quiet in the car when running. Planning to do the same in the boat. The pumps will be mounted to a plate that hangs on the front of the engine.

Helmwurst,

I do have mine literally hard mounted to the transom. It’s pretty much using the boat as a soundboard. I could address that first and see what happens, but I just want to get it done and not have to listen to the whine about the whine for another season.

I guess I should have included…. I have mine returning to the filter head. I wish the tank builder had included a port for returning to the tank, but, sadly, they did not. And I wasn’t about tackle the project of adding one.

I’m kinda shying away from Aeromotive. I’ve been reading and been told some less than favorable info about their longevity. Guessing it’s one of those “They used to be good” scenarios.

Thanks. Brad.

I have been running the A1000 for the past 6 years with no problem. It is mounted to aluminum diamond plate and it magnifies the sound a little. I plan on putting some rubber mounts on it this winter. My return line is to the filter head as well.

RevdUp,

Noted. Which A1000 are you running?

Thanks. Brad.

Pump feed is low pressure, pump outlet is high pressure. Fluid flow at 50-60psi is far greater than 5-7 psi for a carb. The fuel lines can be smaller for the same flow.

You still require sufficient size to prevent pressire loss at injectors...all depends on the system and routing etc. Regulators at injectors solve this.

Guys,

Looking at the Aeromotive options, there is a version of the A1000 that is USCG certified, and almost double the price. Any real reason to spring for the cert gouge?

Thanks. Brad.

Here's the one I'm using.

https://aeromotiveinc.com/products/a...m1wG7yqE8eo17t

Aeromotive Fuel pumps stay clear

I wouldn't think Aeromotive are worth the risk.

If the Weldon you have can be isolated from turning your hull into a guitar, maybe that would be step 1?

Or are the Weldons very loud just by themselves?

If it were me... 2 is 1...1 is none.

Use 2 of the $200 Holleys and put them in parallel with some valving. Relying on a single electric motor is not something I like to do. Twins will have 2 pumps...setup correctly can run both engines from 1 pump at a reduced demand.

Nope. Had two of them die. Garbage.

EDIT: if you do use them and your boat burns down somehow, I suppose an insurance company could deny the claim since they are not certified.