[Diy_efi] Re: tbi timing

[fuelogic at ihug.com.au]

Re. tbi

Hey all...I found 4 pulses per cycle is probably the best method. I'm pretty 
sure most GM stuff injects fairly often for best distribution of fuel. It is 
sync'd to the crank sensor (clearly phasing doesn't matter), except when pulse 
width becomes too small, then unsync's to a lower frequency and longer pulse 
width.
Manifold charging and wetting enrichment seem to be asyncronously superimposed 
over the main sync'd pulses. TBI is pretty complex compared to pfi!...Matt


>What does it matter, as long as flow can increase to accomodate
>air and supply sufficient fuel for stoich, and as long as injector
>is not open too long (if it has an upper time limit on coil
>current to avoid overheating), if it was me I'd use the TDC of
>cyl 1 and maybe x2 for stable idle etc...



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