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351w Fuel Injector Upgrade


Jun 8, 2022

Is it worth upgrading fuel injectors?

Changing fuel injectors is not a “plug-and-play” performance upgrade, such as installing a low restriction air filter. It's something that requires knowledge about how the fuel delivery system works. In fact, upgrading fuel injectors may actually decrease the engine power if done incorrectly. via

Will upgrading fuel injectors increase horsepower?

The technical answer is yes; fuel injectors can add 10 extra horsepower at peak. However, for some car owners, that minimal difference does not offset the increased cost and complexity of switching to fuel injectors or upgrading the existing stock fuel injectors. via

Do bigger fuel injectors increase fuel consumption?

In the end, do not upgrade to larger injectors in an attempt to get better fuel mileage, as new stock sized injectors will do the job if your current injectors are worn out. But at the same time, if you are looking for more power, do not be afraid to go to a larger injector because of losing fuel economy. via

Do you need a tune for upgraded fuel injectors?

Fuel injectors directly affect the air/fuel ratio for the engine and new fuel injectors do require a new or updated tune. via

How much HP does performance fuel injectors add?

Larger throttle body and injectors

A larger high-performance throttle body will deliver more horsepower. Depending on what type of engine you have, you can gain as much as 10-20 more horsepower and comparable torque. via

What size fuel injectors should I use?

of fuel per injector at an 80% (0.8) duty cycle.
Flow Rate Definition, Calculating Horsepower Range.

Injector Flow Rate Naturally Aspirated Engine Engine w/ Power Adder
19 lbs./hr. 225-290 hp 185-240 hp
24 lbs./hr. 280-360 hp 240-300 hp
30 lbs./hr. 350-450 hp 300-375 hp
36 lbs./hr. 425-540 hp 350-450 hp


Can I put bigger injectors on stock engine?

You can;t do a stock tune unless you can fool the ecu into thinking it is getting more or less air. If you throw in bigger injectors it will hold that injector open for the same amount of time as the smaller injectors and it will dump TONS of fuel in. via

Will new fuel injectors make a difference?

A new or upgraded fuel injector can improve engine performance, reduce diesel emissions, and increase the uptime of your truck. Don't wait for a better system to come on the market, though, because when it's worn out, part of the fuel injector – or even the entire system – should be replaced. via

How do I increase the flow of my fuel injectors?

  • Fit larger injectors - which can be very expensive;
  • Add an ancillary injector - which can cause fuel distribution problems when the manifold is then required to flow an air/fuel mix, not just air;
  • via

    Are bigger injectors better?

    Bigger is not always better

    It's easy to fall into the trap of thinking that bigger fuel injectors equal more power, but unless your engine is set up to deal with the extra fuel, you'll be on a fast track to trouble. The excess fuel will flood the engine and it either won't run at all, or will be running too rich. via

    How long do fuel injectors last?

    So, how long do fuel injectors last exactly? Some can be expected to last between 80,000 and 100,000 miles, while the best fuel injectors can last as long as you have your vehicle. You can expect your fuel injectors to last longer with a little care and attention. via

    How do I tune my large injectors HP Tuners? (video)


    How do you increase engine redline? (video)


    How do you build a high RPM engine? (video)


    How much HP will 120lb injectors support?

    Rated injector flow: 120 lb/hr @ 43 PSI. Supports up to 1900 horsepower. via

    Which is better high or low impedance injectors?

    That low-amp current keeps the injector temperature lower, which makes it more reliable; that's why the high-impedance design is the most common injector style for OEM applications. Low-impedance injectors, also called peak-and-hold injectors, are sent a more powerful electrical signal, usually around 56 amps, to open. via

    How much HP will 36 lb injectors support?

    Rated injector flow: 36 lb/hr @ 43 PSI. Supports up to 575 horsepower. via

    What do higher cc injectors do?

    The larger the diameter, the more fuel an injector can deliver. As fuel injector size increases, there are some unwanted side effects. As an injector's hole gets bigger, the minimum amount of fuel it can flow also gets larger. via

    Does exhaust increase HP?

    Everything that comes before the muffler, where the pressure is greatest and performance potential is highest, will remain tight and congested. MagnaFlow, an aftermarket exhaust manufacturer, says that its customers can expect horsepower gains of around 10 percent (which is a pretty commonly-quoted figure). via

    How much HP does an air filter add?

    And if your engine is getting more air, then it can perform better. In fact, a high flow air filter can actually increase your horsepower by about 3 to 5 HP and increase your torque as well. At the same time, this can lead to increased fuel efficiency. via

    How often should fuel injectors be replaced?

    Some fuel injectors are rated to last one billion cycles or approximately the lifetime of the vehicle. But when you factor in the adverse conditions experienced in real-world driving coupled with a lack of proper maintenance, most fuel injectors might need to be replaced every 50,000 to 100,000 miles. via

    Who make the best fuel injectors?

    The Top 9 Fuel Injector in the Global Market:

  • Denso Fuel Injector.
  • Delphi Fuel Injector.
  • Magneti Marelli Fuel Injector.
  • Edelbrock Fuel Injector.
  • Keihin Fuel Injector.
  • Woodward Fuel Injector.
  • Continental Fuel Injector.
  • Stanadyne Fuel injector.
  • via

    Can high fuel pressure damage injectors?

    No permanent damage as long as the pressure doesn't remain high for long. The valves must be fully closing. Even a few thousandths of separation between valve and seat would result in very little to no compression at all, the engine would spin freely when cranking and wouldn't start. via

    Can you modify stock injectors?

    While perusing the Net in times past, Senior Editor Scott Tsuneishi discovered an interesting claim put forth by multiple Subaru DIY-ers on many popular forums: With a simple modification, certain stock Subaru fuel injectors can be made to flow nearly twice their original capacity, reliably, and with no performance via

    Can you tune fuel injectors?

    Fuel injectors directly affect the fuel / air delivery of your vehicle. New fuel injectors do require a new or updated tune. via

    How do you increase fuel pressure? (video)


    How do I know if I need bigger injectors? (video)


    How do I choose an injector?

  • On-site Physician.
  • Injector Qualifications.
  • Full Disclosure of Risks and Benefits.
  • Facility Accreditation.
  • Professional Memberships.
  • Reliable References.
  • Thoroughness.
  • Rapport.
  • via

    Is it better to clean or replace fuel injectors?

    CARS.COM — Cleaning fuel injectors is a service frequently recommended by dealers and repair shops. But unless there are noticeable signs of clogged fuel injectors (such as a rough idle, stalling, poor acceleration or high emissions levels), it might not be necessary. via

    What are the signs of a faulty fuel injector?

    Here are a few signs there might be something wrong with your fuel injectors.

  • The Engine Misfires. Dirty fuel injectors may cause your vehicle's engine to misfire.
  • Idling Gets Rough.
  • Your Gas Mileage Tanks.
  • The RPM Needle Starts to Dance.
  • Your Car Won't Start.
  • via

    Is injector cleaner worth it?

    A good fuel injector cleaner can improve fuel economy, gas mileage, and vehicle performance. It helps lower maintenance costs by keeping the engine clean. A clean engine delivers more power and better performance because it doesn't have to work as hard. via

    What is injector pulse width?

    Injector pulse width is the amount of time, measured in milliseconds (ms), that a fuel injector stays open (delivers fuel) during a cylinder intake cycle. via

    How do you calculate injector flow rate?

  • The formula to find the new FUEL FLOW rate after a fuel pressure change:
  • Example 1: A 240 CC injector tested at 43.5 PSI is run at 50 PSI.
  • So, the resultant change in pressure would yield the following: 240 cc/Min X 1.0721 = 257 cc/Min. 22.86 Lb/Hr X 1.0721 = 24.51 Lb/Hr.
  • via

    What is the fuel injector?

    Fuel Injectors

    The fuel injector is an electronically controlled valve that is supplied with pressurized fuel by the fuel pump and when energized atomizes the fuel into a fine mist so that it can burn easily in the vehicle's engine. via

    What is the highest revving V8 engine?

    Porsche 918 Spyder - 9,150rpm

    A V8 engine layout is not often the first choice of designers seeking to build a high-revving engine. via

    Why is 7000 RPM the limit?

    Petrol engines usually redline at 7000-8000 RPM while diesel hits the peak at around 4500 RPM. This is because diesel engines are not made for high RPM in the first place. They are slow to combust than petrol and are mainly focused on more torque rather than RPM. via

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