Aeromotive 11569 Fuel Pump (340 Series Stealth In-Tank, gm Specific Applications)

I combined this with an '87 Chevy truck sending unit to allow using the stock fuel tank in my EFI-converted '85 C20 Silverado. It feeds a 500-ish HP 468CI big block with a Holley HP TBI unit just fine. The TBI operates at 21 PSI, so this provides some breathing room; I'm running gasoline, but this should be sufficient to feed that big ol' thing E85 if I get around to converting one day.Installation was pretty straightforward. I had to trim a little bit of the supplied bottom gasket to fit in the stock carrier, and there was a little bit of work involved in switching the stock power connector to use the pigtail that came in the kit, but that's mostly just because I'm anal and wanted it to all seem like it was stock; splicing the wires like a sane person would've only taken someone a few seconds.Noise is really pretty minor. I can tell when it's turned on before I start the engine, but the dual 3.5" exhaust drowns the pump out pretty quickly. It's not nearly as loud as the "Holley Red" frame-mounted electric pump on my wife's Chevelle. As far as in-tank pumps go, it's quiet for a performance pump, and on the loud end for a stock pump. In a car with the tank out back, you might not hear it inside; in my truck with minimal sound deadening and the pump right in the gap between the cab and bed, I barely hear it with the windows up.Flow is good. Through 3/8" line (mostly metal pipe, with a small length of flexible line on either end), pressure stays at 20-22PSI pretty much regardless of demand. I think the "just ok" built-in regulator on the TBI is what causes the small variation in pressure (the regulator is set at 21). At 6K RPM, I'm using about 210 lbs/hr on this engine, which isn't even half of the pump's rated capacity. So, whatever you're putting it on will probably be just fine as long as you're only making three-digit horsepower. :DOtherwise, this thing looks and feels very well-made. Both fit and finish of the parts is quite good, it feels nice, and the connections feel solid. I've been driving around with it for a few months now, after probably six more months of infrequent use during assembly / tuning. The only thing that I'm not super excited about is that the fuel pressure does bleed off fairly quickly when the pump is turned off. However, I don't know for sure if it's bleeding past the regulator, or back through the pump. Either way, it only takes a small fraction of a second between key-on and pressure being built back up, because of the volume the pump moves - that's why systems have a "prime" cycle when you turn the key on. So it doesn't impact startup, which means it's ultimately not a problem other than me knowing it's happening. I'd recommend this pump.

I decided on this stealth pump from Aeromotive and thats just what it is...”stealthy”. My original Walboro 255 pump whined obnoxiously and it was an annoyance. After two Walboro pumps, this pump delivers literally and figuratively. And in fact, its QUIET! Get this for your LS swap project and you wont be disappointed.

I bought this fuel pump in march 2024 everything was working fine but it randomly went out now in July 2024 it only lasted 4 months it’s definitely both worth it for the price.

Just what I needed. Replaces superceded part 11169

Giving this full stars for install and being SOOOO freaking quiet. U can run this in the Library and won't get put out. The AEM inline pump I purchased before I replaced it with this unit was annoyingly loud. Now I'm stuck with it.