afm question and adjustable fuel regulators ---for JIM C.

[mark kibort <mkibort@xxxxxxxxxxxxxx>]

  So, Jim you said that there was an embedded science that the bosch peop=
le
keep =

us from knowing about the interaction of the o2 sensor with the CPU, even=

when it
goes into open loop mode under almost full throttle conditions.    Yet, o=
n
the dyno, =

with the horibra fuel air sensor  conected, we were able to adjust from
13.8  to 12.3 and
then back to the best HP 12.6  air to fuel ratios.    Why was this if the=

RRFPR's are useless.

Now , I would obviously love to toss out the AFM and put in something tha=
t
you recommend,
but, thats not a cost effective option comparing the  HP I would make , a=
nd
the engine mods I should
do first.   But , as a intermediate step, isnt the system able to deal wi=
th
such mods to the fuel pressure,
 as under part throttle, the injector duration would be less as the O2
sesor would sense the richer
mixture , and the mixture that is lean anyway under part throttle would n=
ot
really be effected. (even
though I understand your point that it would be fighting the increased fu=
el
pressure)

Under full throttle conditions, where you care about you hp and keeping
your mixture ideal  for Hp, =

dont the fuel regs make sense , for small changes?     (especially when
bosch for the  "84 version of
the L-Jetronic doesnt alow for chip changes.)    =


How could I test to see if the fuel regs are truely usless as you call
them.   the only test I didnt do was to hook the O2 sensor in and make
another hole for Horibra sensor and see if there was any difference in
mixture with the o2 connected and disconected under full throttle
condition.  (open loop mode.)

thanks.

mark

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