injection timing

[Dave J. Andruczyk]

How come a Bosch CIS ( continuous injection ( mechanical)) on a Porsche
924 ( or any audi /VW for  that matter of the late 70's ) tends to have a
MUCH smoother idle than many newer sequential efi systems. ??  The spray
is always sprayed constantly, at the intake valve, and to mee that would
cause puddling, and rough idle, but ironically runs smoother and better
than most efi systems.  My car with a stock ( but soon to be modified CIS
(K-Jetronic)) is capable of idling STEADILY at under 300 RPM. A stab at
the gas peadle gives immmediate response. ( nearly impossible to stall it
even at the low idle when just jabbing at the accelerator.)

Anyone ever consider adding a feedback system to CIS other than
KE-jetronic's (frequency valve ) ???  (trick is to modulate "control
pressure", (formerly from the warm up regulator,  why not put in a
variable valve to control pressure in the circuit to give  closed loop
fuel delivery ?


Just some thoughts for chewing..

Dave