Bosch to Hitachi, Ancient history

[Todd King]

  <<< From: "Terry McLane 312.630.0533" <MCLANE.TERRY at ntrs.com>
  Date: Tue, 3 Sep 1996 15:02:05 CDT
  Subject: Bosch to Hitachi MAF
      The voltage figures I quoted were only for purposes of example, but
      it should only be necessary to measure the air flow up to the engine's
      peak volumetric efficiency.  This should cooincide with peak torque
  >>>
  
  A good way to do this would be to put both sensors in series; set up a
  6811 w/ onboard A/D to sample the output of both sensors during some WOT
  pulls. Then you have a conversion map to go by. Then to convert you 
  could use the 6811 to sample the new sensor, refer to the conversion map,
  then output the converted value to a D/A and LPF. Sounds harder than
  it really is. Of course a nice, easy inverting op amp would be the way
  to go if the new sensor output lends itself to that, as Tom Cloud has
  indicated. But the other way is more fun :-) My GM MAF uses a frequency
  output, about 30 Hz to 150 Hz.
  
  <<<   From: Arnaldo Echevarria <aec at ao.net>
  Date: Tue, 3 Sep 1996 19:43:15 -0400
  Subject: Re: Ancient History
  ...
  guy with a 455 got 20MPG(??!) in one of the real street eliminators.
  Yeah right! ..or did you see the buick turbo v-6 that got 48mpg and ran
  low 13's in the 1/4 mile?)
  
  Yeah, he had problems that day and was only able to get 13's out of it.
  My Turbo Regal gets about 17 city, 24 hwy. The 48 mpg was real but was
  done with a special, lean cruise mode chip. I have this type chip in
  my car right now and will be driving it to Vancouver, BC (from Portland)
  to race there at the end of the month; I'll report my mpg from the trip.
  'Course with the ported iron heads I'm installing this month I plan to
  get real bad strip mpg, especially when those new 50 lb/hr injectors
  get thirsty with all that intercooled air being blown past 'em :-)
  I'll run the stock cam for now (195 deg dur. @ 0.050", 0.400" lift).
  I'm hoping for about 11.50 at near 120 mph for starters but we'll see.
  I'll be gathering lots of good EFI data so hopefully we can learn
  something...
  
  Todd  Todd_King at ccm.co.intel.com