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Thread: Power or Timing Control via Analog Input

  1. #1

    Default Power or Timing Control via Analog Input

    I have an external analog chassis sensor system that outputs 0-4 volts. 4 volts is resting, 2 volts is safe but slow, 1 volt ideal, and 0 volts is catastrophic. An ideal limit would be a ramp between 0.5 & .25 volts.
    I'd like a ramp, but the only way I see to pull power is by using an input and setting a warning limit that knocks back power.
    Is there any way to program a linear timing change based on an analog input? If I'm stuck with a threshold hard switch, is this a way to do it? Thanks!

    Attachment 2883

  2. #2


    Anyone know anything on this? Is this the only way to pull timing based on an external input, just in one lump amount instead of a ramp vs external voltage?

  3. #3
    Join Date
    Dec 2009


    You can also retard timing using a "Timing Offset" Advanced 1D/2D Table (Advanced ICF), via a Switched Enable or an Advanced Enable.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  4. #4


    Thanks Danny.

    It looks like that is just a 12V or ground switch. Ideally I need something that will change timing with an analog input. I chose making a 5V sensor with a warning limit, so I can at least dial the voltage at which it knocks timing off.

    I have an analog sensor system that tells me car tilt angle. As the front tires start to go over a few inches I'd like to proportionally pull back power, so it settles at one tire height. If nothing in the Holley can track an analog voltage, I guess I could buy a Dominator and do a multiple switched input in three stages with fixed pull back across the entire RPM range. That would be almost as good as analog.

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