Do you need to increase fuel injection when modifying and increasing the throttle?

Increasing the throttle is generally not a single modification. If you are a naturally aspirated car, you should have done cylinder liner operation on it, such as 1.8 to 2.0 displacement. At this time, if your compression ratio changes, you need a bigger throttle to inhale more oxygen. If you just change the throttle.

There is no positive effect, just because the original compression ratio is suitable for the throttle intake of your original factory, so the number of times to clean the throttle is increased. How much air you blow in at this time, the value really used for compression combustion has not changed.