What Do Bigger Injectors Do on a Diesel?

Bigger Injectors Are Quicker-Firing Injectors

This means less timing advance (i.e. start of injection) to achieve your power goals, which translates into less stress placed on the engine's rotating assembly. Electrical discharge machining (EDM) is the most common means of enlarging the holes in a fuel injector nozzle.

Do bigger injectors increase power?

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.

What will bigger fuel 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.