how much fuel pump pressure?

The answer of 9 psi is terribly incorrect. This is a factory pump designed to put out 5 psi so says the spec sheet for this pump. If it actually put out 9 psi, it would likely lift the needles off the seats and flood the engine since almost all stock to mild factory and aftermarket carburetors that would require this type of stock GPH flow are designed for a maximum of 6.5 psi and will flood at anything above 7 psi.

where is it made/does it have a poylmer diapham to hold up to heat & ethenol?

Ethanol is a problem in many situations.

Does this pump fit a 1963 Chevy 327 , 250 h.p. Block ?

Yes, it fits, though fabrication of lines in and out might be necessary.

Will this fit on a 350 sbc?

Yes, absolutely. If it’s 1986 or older block with a fuel pump provision, or an aftermarket performance block 🏁

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Description

⚡ Power your ride with precision – the OE mechanical fuel pump that means business!

TAILORED FIT - Engineered for vehicle-specific compatibility to ensure seamless installation
COMPLETE KIT READY - Includes essential gaskets for hassle-free replacement and optimal sealing
LEGACY OF EXCELLENCE - Backed by 80+ years of Delphi OE heritage for unmatched reliability
TRUSTED OE STANDARDS - Built to original equipment specifications for guaranteed performance and peace of mind
DURABLE CRAFTSMANSHIP - Robust metal construction designed to withstand rigorous mechanical demands

The DelphiMF0001 Mechanical Fuel Pump is a frame-mounted, piston-style fuel pump crafted from durable metal, designed specifically for vehicle-specific fitment. Leveraging over 80 years of Delphi's original equipment manufacturing expertise, it meets strict OE standards to ensure reliable fuel delivery and seamless installation, complete with included gaskets for a perfect seal.

Specifications

Brand	Delphi
Fit Type	Vehicle Specific Fit
Vehicle Service Type	Car
Item dimensions L x W x H	3.5 x 6 x 4.5 inches
Material	Metal
Item Weight	1 Pounds
Style	Piston
Specification Met	OE
Auto Part Position	Right
Outlet Connection Type	Barb
Body Material	Metal
Inlet Connection Type	Hose Barb
Gas Type	Gasoline
Mounting Type	Frame Mount
Operation Mode	Mechanical
Product Grade	Replacement Part
Global Trade Identification Number	00689604212233
Automotive Fit Type	Vehicle Specific Fit
OEM Part Number	40987, 40987, 6440726, 6440987, M16011
Manufacturer	Delphi
UPC	689604212233
Model	MF0001
Item Weight	1 pounds
Product Dimensions	3.5 x 6 x 4.5 inches
Item model number	MF0001
Exterior	Machined
Manufacturer Part Number	MF0001

Reviews

R**Y

Didn't cost to much

Ok. I put this pump on my sbc 350 this morning. and it works great. to great for some reason it's putting out 2 1/2 times the psi almost 15 psi. that is way to much for my carburetor which 6.5 is max I can run it. It will blow out my needle and seats. Luckily I only paid $16 bucks. Is it worth it to send it back. I don't know.

2.04.2024

M**W

Reliable

This went on a daily driver so it had to be reliable. It’s been installed for years and still functions like new. Doesn’t loose prime unless it sits for several days. Starts right up every morning and never had a vapor lock issue. Excellent value for the money.

27.08.2024

D**I

Buy metering valve with this order.

Pumps really good so good that you will need a metering valve to not flood you carb

11.09.2025

S**R

Perfect fit 70 monte carlo

Was taken back by some of the reviews, I was worried if the fuel outlet was clocked wrong or something. It's not. It's a steel line and they are very hard to get threaded. I can't imagine blaming the pump, the manufacturer or China for this... Loosen it up at the carb to make it easier. Is what it is. Pump fits and works perfect.

14.05.2022

S**E

Fuel pump

Good pumps. They put out a little bit higher pressure than expected for a stock pump. But work good. Keep in mind you might have to get a pressure regulator depending on your application.

23.07.2025

E**D

Pressure too high

Product is putting out way too much fuel pressure need the one that puts out 5psi low and 7psi high side

14.09.2025

R**R

Fuel pump

This pump fit perfect and works great

22.09.2024

P**M

Don't waste your money

These are junk...do not buy...they leak fuel...

31.12.2024

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