Some thoughts and questions on EFI

[Jonathan R. Lusky]

Robert Gallant writes:
> How about deceleration fuel cut.
 
Idle air control (IAC) would be nice, too.  Good IAC can really smooth
out a big cam at idle.

In case anyone hasn't seen it before (i've seen it posted to r.a.t),
this is the basic equation GM uses for its speed density systems:

OT = (BPC * F/A * VE * BLC * DFCO * DE)/2 + AE
where OT = Injector On Time
     BPC = Base pulse constant
     F/A = 1/(desired AF ratio)
      VE = Volumetric efficiency
     BLC = Block learn multiplier/128
    DFCO = Deceleration fuel cutoff
      DE = Deceleration enleanment
      AE = Acceleration enrichment


-- 
Jonathan R. Lusky  --  lusky at knuth.mtsu.edu
 "Turbos are nice but I'd rather be blown!"
   89 Jeep Wrangler - 258 / pile of junk!
       80 Toyota Celica - 20R / 5spd