How Much Fuel Pressure Does a Chevy 350 Need

Quadrajet performance engines 6 - 7 psi. 5 - 6 psi at idle Quadrajet street engines 4 - 5 psi.

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With Edelbrock carburetors avoid extremes in fuel pressure.

. My friend found some specs in his Chilton manual for the pickups and the 350 models required 7 psi I think and the 454 required 9 psi. If its a 96 vortec 350 57L then it has 8. 198600 40547 30544 47 min.

You need a fuel pressure adjuster an aftermarket item costing around 100. I will be using an aftermarket fuel pump and regulator and i need to know the reqd fuel pressure to make this thing happy. I forget but i remember when i had a carbed huge motor in my.

Pump should come on with key and build pressure and shut off. On modern automobiles the average fuel pump pressure is over 60 PSI pounds per square inch. The stock pump is between 63 - 67 psi.

Small block chevys call for 5 to 7 psi if the pump pushes more it could cause rich condition if you want to use the hi pressure pump get a fuel pressure regulator they come in chrome also and you will be able to reduce the pressure and rich condition. The best pressure for the Rochester 2Gs is 3 PSI so I would install a fuel pressure regulator after the Speedway Motors fuel pump part 91602046. Will the carb hold the pressure from the stock fuel pump.

5 - 7 psi. I am just wondering if my fuel pump should be putting out more psi. I have a chevy tbi 350 from an 89 suburban.

08-12-05 0445 PM - Post 759285. Only 7psi fuel pressure. Pressure should increase up to the low 40 psi range with the engine under load.

65 psi max Demon. At IDLE there should not be any more than 60 psi. And it should have 60 to 66 lbs.

Trucks with either the 50-liter or 57-liter V-8 should have fuel pressure between 60 and 66 psi. 4 Answers 1465 Jesse answered 9 years ago Fuel injected fuel pumps are high pressure at about 30-45psi. How many fuel injectors does a 1996 Chevy 57 liter 350 vortec motor have.

Most carb engines use a 5to 7 lbs pressure 9 would be max. What is the GM spec for fuel pressure on the 350 vortec. Discussion Starter 1 May 10 2011.

It would be ideal to see a steady 5-6-or 7 lbs what ever you set the pressure to. Have yet to tape the gauge to the windshield and go driving though. Fuel pressure drops down to about 1 or 2 psi when I open the throttle at idle.

The engine started and ran for a few seconds. You can jump 2 terminals on the ALDL to turn the pump on hopefully someone here knows which. 57L DOHC 199094 4855 3852 55 min.

I have plenty of gas getting to the - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. This means that the reason your pick up or SUV is not starting is due to a lack of fuel. CHEVROLETGMC TRUCKS 1985 00 Includes Chevrolet Lumina APV Oldsmobile Bravada Silhoeutte Venture Pontiac Trans Sport Isuzu Hombre CARBURETED TBI Engine Year Pressure idle PSI.

In response to dragula. Recommended Fuel Pressure. On classic cars with mechanical style fuel pumps however the pressure is much lowerbetween four and six PSI.

If the fuel pressure is low common symptoms include rough idling and engine hesitation. 45 - 65 psi. For an engine such as yours around 55- 6 pounds should be sufficient as the stock pump only puts out about 6 pounds of fuel pressure.

Remember that there is a pressure regulator that is susposed to maintain that pressure. I have a 1996 chevy truck with the 350 motor it has too much fuel pressure 78 lbs. The fuel system in your 43L 50L or 57L Vortec engine needs at least 50 PSI of fuel pressure to start.

The fuel pump produces much more than just 50 PSI of course but the bare minimum the engine needs to start is 50 PSI. Im changin my throttle body 305 to a caburated 350. Anything less and it will crank for ever before it starts or not start at all.

Carbs need around 5-8psi. If you wanted to run nitrous or any bigger engine you would have to upgrade the system or the pump at least. I have done alot of searching and know that anything over 55 etc is good however my buddys truck 1996 Chevy K1500 57L 4L60E has a P0300 code and.

Whenever changes are made in the fuel system its always a good idea to go back and recheck the float settings as the electric pump will provide a steady flow of fuel to the carb where a stock pump pulses. The 38 line should be used for proper supply. How much fuel pressure does a 97 chevy 350 57 vortec need to pass the injectors.

If the vehicle has an adjustable fuel-pressure regulator set it to 55 psi. 57L 350 Corvette 1985 3439 2436 60 min. As long as the fuel pressure is within the normal range the fuel system is likely operating normally.

Your pumplines are marginally adequate though. Have replaced the fuel pump 1 year ago and it worked fine until a couple of weeks a. 9-13 i think is spec.

If you want a return line and the pump doesnt have one use a return style regulator. Any help would be appreciated. Alright guys im relying on someone to help me out here with the actual PER GM specs for the Vortec Fuel pressure.

If you suspect that your fuel pump is not producing enough pressure there are two tests you can perform. Hi allen I think you will find that your normal pressure should be 60 PSI. I have looked and found answers from 50 psi to 70With the key on mine is 60 psi and running at idle it is 52 psi.

55 - 75 psi. 89 350 TBI pump. Now that you have confirmed that the no-start problem is due to a lack of fuel you now need to actually confirm how much pressure the fuel pump is producing with a fuel pressure gauge.

With the engine started pressure should drop 7-10 psi. Joined Feb 20 2008. Fuel pressure should be 41-47 psi key on engine off.

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