Pulsed injectors on/off times

[Orin Eman]

Go to www.diy-efi.org and read the archives.

Orin.

> 
> This sort of general auto tech question, but I'm considering using it on an 
> Audi. For injectors, how do you find the values such as max t-on and min 
> t-off. In other words, is there some standard percentage of rated flow that 
> designers use for an EFI setup? I know it's standard design to use 80-85% 
> of the rated max flow. I'm concerned about choosing too large an injector. 
> If it's too big, the injector might be so large that it can't turn on for a 
> short enough time to run the engine at idle, by flooding it w/ too much 
> fuel. So what's the standard figure for minimum injector output...5-10%? Or 
> can injectors be shut off completely by the ECU. This I doubt...why would 
> those 600hp imports use dual injectors to retain street driving? Thanks.
> 
> -ameer
>