Re: more details sbc in place of lt1

[Len Sabatine <sabatine@epix.net>]

   Yes the OptiSpark is no more , the HiRes remains in VCM using CKP signal.
   Look how many parts have been eliminated , the CNP  IGN Sys is another
   story in itself.  The "OLD" Lt1 Opti Spark  reminds one of OPTICAL ENCODERS
   used in "position sensing " from printers to robotics. Wasn't a NEW 
IDEA , just
   new to an Engine. It really lost out to the "Bean Counters", and space 
limits,
   as did the reverse cooling system . The General uses pieces of a larger
   whole , scattered around among platforms as part of a bigger picture coming
  at us later down stream. FYI , parts of OBD2 code have been with us for 
years
   in all those different vehicle controllers, like it or not. Now it's 
all in one PLACE,
 with it's own protocol, which is going to change again , soon. Look at an LS1
 block design , gee like it's not been here B4 , combine FE Ford and Chrysler
  "B" wedge design elements. What's New ??  Anything ?
  Oh . if you're doing fuel/ timing "right" you look @ 2, 360 d  [ I-E ] 
Cycles.
  sequential. Now its INTERNAL VCM /Not external Opti Spark. You know
 they [GM] will try something else in short time , keeps us on Merry Go Round.
 They're running No Cam / No Starter engines in the lab NOW. Cams'  on a CD.
 { ElecroHydraulic Vave Actuators from Aero Space  work .}   History ?
 Len.

> No no, I wudn't actually questioning the logic, what I meant by "was it
> temporary madness?", is look how quickly they swung back in the udder
> direction of rough timing resolution. Currently what production vehicles
> use hi-res IGN timing? Well, I WAS questioning the wisdom/madness of
> using optics in ANY non-hermetic environment, but much higher IGN
> precision coulda been gotten from even magnetic tech if they'd wanted
> to. Why the flip-flop?
>
> The desireability of higher IGN resolution I figure pretty much everyone
> of us can appreciate, but why give up after one small skirmish, and some
> bad choice of sensing techniques/design. It's almost like that one
> experience gave them such a bad taste in their mouth that they never
> tried it again? I dunno, I don't really know the history well enough to
> guess; it just seemed like an odd hystorical event, thas all.
>
> Gar
>
>
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