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cmracing · 03-22-2020, 10:25 PM

Nope, depends on the EFI system you are using. A newer system, like Holley, and there are others, will let you time when the injectors open, but to do so they need to be much larger than "typical". If you were to use a 30 pounder or so, you wouldn't be able to change when the injector opens in relationship to the intake valve, you wouldn't be able to get enough fuel in the chamber at higher rpms. By over-sizing it, you have the flexibility to try different things. Again, only if your particular EFI system will let you adjust the actual "timing" of the injection events.

03-22-2020, 10:25 PM	#2
cmracing Member Join Date: Aug 2016 Posts: 173 Likes: 113 Liked 62 Times in 29 Posts	Re: injector size Nope, depends on the EFI system you are using. A newer system, like Holley, and there are others, will let you time when the injectors open, but to do so they need to be much larger than "typical". If you were to use a 30 pounder or so, you wouldn't be able to change when the injector opens in relationship to the intake valve, you wouldn't be able to get enough fuel in the chamber at higher rpms. By over-sizing it, you have the flexibility to try different things. Again, only if your particular EFI system will let you adjust the actual "timing" of the injection events.