Fw: more on netres

[Bruce Plecan]

Well,  Doc had been using the computer this afternoon, and made contact with
Dr.X...     Gads, dunno who that boy talks to when I'm away.    Anyway,
here's what he was able to get from him.
I think Doc is getting well versed in Mind control, so be sure to wear a
well grounded AL Foil lined CSH when reading this.
Bruce
   87 Black Car (Vader's stuff is a Disney Ride compared to this)


> Ok, when in limp mode the ecm fires both injectors together,
> at every other DRP. This means that with the same PW as in
> live mode, the same amount of fuel is fed.
>
> On the netres, pin 16 is vcc. Pins 4 & 7 are ground.
>
> Here's a chart of pin #'s and resistances for a v8 & v6 netres:
>
> (Please put this in fixed font when you look at it! Otherwise
> I have to use html.)
>
> '747 NetRes:
>
>  16060837 (v8)  16051637 (v6)
>  -------------  -------------
>  vcc gnd  vcc gnd
> Pin# p16 p4&7  p16 p4&7
>
>   1 25.71k 130.5k  24.08k 99k  ; Prog
>   2 26.09k 131.1k  25.26k 100k  ; Prog
>   3 12.08k 116.5k  12.08k 86.4k  ; Prog
>   4 107.9k ----  75k ----  ; Gnd
>   5 84.3k 56.0k  56.8k 58.1k  ; Prog
>   6 94.8k 44.2k  63.8k 48.6k  ; Prog
>   7 107.9k ----  75k ----  ; Gnd
>   8    0     0  ; inj mux, A select
>
>   9   ~   ~   4.6k  ; RFD mode of some sort?
>  10 108.3k 13.85k  63.3k 14.2k  ; Prog
>  11 10k   10k   ; RFD enable
>  12 994   997   ; MCU1 I/O b6
>  13 35.57k 143.5k  43.3k 118.5k  ; Prog
>  14 28.07k 136.0k  385k 461k  ; Prog
>  15 21.04k 128.9k  11.5k 86.8k  ; Prog
>  16 ---- 107.9k  ---- 75k  ; vcc
>
> -- end fixed font --
>
> Now, what do the pins do? Two pins affect the overall gain.
> Three pins affect the map gains. And two pins affect the cts
> gains.
>
> MAP:
>
>     pin 14: gain, to vcc reduces gain. Simple gain change.
>     pin 10: gain balance, to gnd reduces gain. Changes the slope of the
>                 gain. (Lessor change to PW from low to high to low map).
>
>     pin  5: gain curve, to vcc shifts knee to a higher map. This sets
>                 the point of map value where the map PW gain makes
>                 a sudden increase.
>
> CTS:
>
>     pin  1: gain, to vcc reduces gain. Simple gain change.
>     pin 15: gain curve, to vcc ??? shifts knee.
>
> MAP & CTS:
>
>     pin  3: gain, to ground reduces gain.
>     pin 13: gain, to vcc reduces gain.
>
> The gain curve is interesting. The actual gain vs. MAP/CTS value
> is mostly linear until a certain MAP/CTS setting. At this point the
> gain will jump. In other words the PW will increase more rapidly when
> say going from 80, 82 . . . 85 map, boom. All the sudden more PW.
>
> Changing this trip point does not affect the end point gains. What-
> ever PW was at 20 map & whatever PW at 100 map does not
> change when changing the knee point.
>
> For CTS, the knee gain drops with a rising coolant temperature. For
> MAP the knee gain increases with a rising manifold pressure.
>
> So, if your running a hot SBC with org/blk injectors @ 30psi. You
> might want to try something like this:
>
> Place a 10k from pin 1 to vcc.
> Place a 100k from pin 3 to gnd.
> Place a 13.3k from pin 14 to vcc.
>
> This matches up real nice with the actual PW's.


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