[Diy_efi] Donegan ECU

[Carter Shore]

On 2007-01-06 Mike V <efi at dyakron.com> wrote:

> If that's true, wouldn't the opposite also be true?
> Is there a formula that one can use to examine this?

Mike, here's an article that references the formula:

http://www.autospeed.com/cms/article.html?&A=0349

The formula is:

new Flow = sqrt(new Pressure/oldPressure) * old Flow

It also shows that I'm full of beans;
Reduce the pressure by 10%, you get only 5.5% flow
reduction:

sqrt(0.9) = 0.9486

I still feel that ECU control of the fuel pressure is
a useful way to extend the dynamic range of the
injectors, but the formula shows that it's not as
effective as my first post claimed.

Carter



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