re: Drooling injectors V12 and trip computers

[David J Shield <David_J_Shield@ccm.fm.intel.com>]

     John (and all),
     
     The trip computer gathers it's information from the ECU.  I'll do 
     some investigation on this, but the data interchange between the 
     two is all digital and thus would be complicated to recalibrate.
     
     Mine seems pretty accurate.  The tires are a little less tall 
     than stock, so everything is skewed a bit (the trip computer, as 
     the speedo, only know how many times the wheels go around, not 
     how far the car has really gone).
     
     Anyway, I'll do some checking on this late tonight.
     
     David
     '84 XJ6 VDP
     
     
     
     >Date: Tue, 4 Feb 1997 17:20:30 -0800
     >From: albrecht@ix.netcom.com
     >Subject: RE: drooling injectors V12
     
     >From what I've been told (unverified), fuel-flow measurement 
     >should be independent of flow-rate.  The fuel-flow data are 
     >supposedly interpolated from data derived from a single 
     >fuel-injector.  Assuming the fuel pressure is constant, and the 
     >datum being measured is injector "on" time, then the 
     >fuel-consumption should be much more accurate than 10%.  I would 
     >think even thermal effects wouldn't affect the calculation by 
     >that amount.
     
     >I'm still hoping someone can supply the schematics for the ECU 
     >and the Trip Computer so I can determine if there is a way to 
     >re-adjust this calculation algorithm on my vehicle.
     
     >John A.
     >84 XJ6

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