What do bigger injector nozzles do?

In short, just remember that the smaller the nozzle, the better the atomization is and the better the ability to tow and keep your exhaust gas temperatures down, while the larger nozzle will make more power when paired with the right size injector.

What do oversized injectors do?

By putting larger injectors into the truck (usually referred to as “percentage over”), we are able to get that bigger quantity of fuel into the cylinder, keeping the pulse width in a safe zone, and requiring less total injection timing.

What does 30% over injectors mean?

30% Overs are a nice performance upgrade to increase your horsepower. This 30% Over injector equates to approximately 50 HP. When tuned properly, this will help your fuel economy and throttle response with clean smoke.

What does 20% over injectors mean?

Description. 20% overs are a nice performance upgrade to increase your horsepower and requires NO tuning after installation. This 20% Over injector equates to approximately 35 HP. When tuned properly, this will help your fuel economy and throttle response with clean smoke.

What does 45% over injectors mean?

Description. 45% Overs are for the individuals who want to go one step further with their truck. With the proper tuning, this will give your truck greater power. The 45% Over Injector equates to approximently 90+HP. It also opens up more options for upgrading your vehicle.

Effects of Nozzle Size on Injector Function

Do bigger injectors add HP?

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. There is a catch, however. Go too large and you can lose power.

Do you need a tune for bigger injectors?

In general, injectors need a tune. Otherwise, your ECU is trying to drive the new, bigger injectors using the duty cycle and dead times for the old, smaller injectors, which means too much gas potentially at the wrong time (i.e. - running rich and potentially missing).

What happens if you put bigger injectors on a stock motor?

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.

Is upgrading fuel injectors worth it?

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.

Will bigger injectors increase HP diesel?

When it comes to adding performance in modern diesel engines, it pays to go with big fuel injectors. Larger injector nozzles and higher fuel flow equals more horsepower potential while also making life easier for the engine.

Can you drive with bigger injectors?

No. If it even starts, you will risk bore-wash. Either tow it, or do the pump/rails yourself but leave the stock injectors, and swap in the bigger ones at the tuner's place.

When should I upgrade my injectors?

But once the engine begins to process an increased amount of air (either by adding boost or NOS or grossly changing the engine's displacement), the fuel injectors won't be able to flow enough fuel to keep the engine from running lean. This is when one should consider upgrading their fuel delivery system.

Do I need a tune after new injectors?

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

How do I get more torque?

An effective modification that will increase torque significantly is to install a turbo or supercharger. Forced induction forces air into your engine, increasing the power the engine provides. Depending on the torque curve you prefer, a turbocharger will need time to spool before it provides torque benefits.

How do you increase engine power?

How much HP is 60 over injectors?

60% Over Displacement. 180 Horsepower Increase. Enough Fueling to Support 975 Rear Wheel Horsepower. Modified or Dual CP3 Mandatory.

What does 75 over injectors mean?

The 75% fuel injector nozzle will empty the fuel quicker, so you can spray fuel into the cylinder in a shorter time. This helps significantly with making more power at higher RPM's. This would be best suited for a competition or “hot street” diesel truck.

How much HP does 100hp injectors add?

100% larger are 140 hp, 100hp injectors are like 67% larger than stock (in cross section area).... this is just what some quick use of the calculator tells me, i dont think its set in stone. Exactly. It's targeted at the people who are either new to diesels, or who just don't know what the hell they're doing.

Will bigger injectors hurt mpg?

So, as long as the gas pedal can be kept under control with the new power from the larger injectors, there will not be much of a change in average miles per gallon, if any at all.

When should I upgrade my diesel injectors?

Diesel fuel injectors generally have a shorter lifespan than their predecessors, meaning they need to be replaced more frequently for optimal performance. The life expectancy of a good quality diesel fuel injector is around 150,000 kilometres. They should be checked out by a professional at around this time.