Results 1 to 2 of 2

Thread: HP EFI Compatability

  1. #1

    Default HP EFI Compatability

    I have a 1995 Dodge Ram with the 5.9L Magnum that I recently did heads & cam, and of course, it's OBD1 and can't be tuned, but I was wondering if the stock crank & cam sensors are compatible with the HP EFI. Crank sensor is on the back of the block and looks at the ring on the flywheel. Any input would be appreciated.

  2. #2
    Join Date
    Dec 2009


    Are they Hall-Effect crank & cam sensors or VR magnetic?
    In my opinion, if a Holley EFI user isn't familiar with the Magnetic Ignition Type "Minimum Signal Voltage" &
    "Filtering" parameters (in System Parameters/Custom Ignition Parameters), then they have no business using
    VR/magnetic pickup type crank & cam sensors. This is the problem with using magnetic pickup type sensors,
    there's more tuning work/adjustment involved. Hall-Effect sensors are "set & forget", very easy to use.

    The more robust Hall-Effect sensors are preferred because they're not susceptible to EMI/RFI interference/noise,
    and their digital square-wave signal strength is consistent, regardless of RPM (unlike the VR magnetic sine-wave).
    Also, the VR magnetic pickup signal is weaker at cranking speeds.

    Another problem with using VR Magnetic sensors, is there's more tuning work. Hall-Effect is "set & forget".
    The VR Magnetic Sensor Type "Filtering" & "Minimum Signal Voltage" parameters need to be programmed. (Magnetic Crank/Cam Input Filtering Parameters, Page 2) (Example: Wrong Magnetic Parameters, Post #25)

    Hall-Effect: 3-wire, square wave signal (digital), pulse generation
    VR Magnetic: 2-wire, sine wave signal (inductive), voltage generation (Hall-Effect vs VR Magnetic)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
About us
Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR® Sprint® Cup team and nearly every NHRA® Pro–Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Headers, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.
Join us