Changing fuel pressure

[2x0]

My injectors tested at about 925cc of flow at 43.5psi. In order to lower my duty cycle, I am installing an adjustable fuel pressure regulator, and would like to increase fuel pressure to 60psi.

Question, what is the best way to compensate for this in my fueling parameters? Can I simply take 925/43.5 = 21.26cc/psi, then multiply 21.26 x 60 = 1275cc and use this as my new injector size? Does increasing fuel pressure affect dead times also?

I know that Smanager will calculate overall trim by entering old and new fuel pressure, but I already use 30% overall trim due to e85 and this is how all my tables are set up. I am afraid that changing overall trim could throw things off.

So which is the preferred method, and what things will be affected differently by changing these two parameters?

Thanks,

[Spunkster]

You will have to retune for the change in pressure. The dead times bay be different at a higher pressure as well.

[2x0]

Yes, I will retune the fuel tables as needed once the pressure is adjusted. But for a base starting point, is it better to account for the pressure difference by changing injector sizing, or overall fuel trim.

[Spunkster]

If the size of the injector has not changed, then you should not change that setting.