injector staging

[Greg Hermann]

At 5:59 PM 10/25/01, bill.shurvinton at nokia.com wrote:
>Hi,
>
>Sorry to interupt everything with an EFI question, but I wondered what
>the rule of thumb was when doing staged injection in terms of when it
>was better to run one injector and when to switch to 2. looking at
>standard injector ramping profiles it would suggest that, once your
>total squirt is around 1ms then you have sufficient accuracy to meter
>fuel (for Bruce: metre is the unit of length=39.27inches), but below
>0.5ms it starts to get difficult due to injector opening and closing
>times becoming significant.
>
>Any pointers would be appreciated.
>
>Rgds
>
>Bill

Staged injectors will _always_  give you much better "dynamic range" and
more accuracy at idle and cruise.

You will get the best range if you size them 1/3--primary / 2/3 secondary.

Greg


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