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Thread: MSD Digital 6 & Sniper 4500

  1. #1

    Default MSD Digital 6 & Sniper 4500

    Hello. New to EFI and just got a Sniper 4500. Can I use my MSD 85551 distributor and MSD Digital 6 box together with the 4500? Thanks.

  2. #2

    Default

    In short answer, yes. But are you wanting to control the timing with the Sniper? The Sniper instructions are fairly straight forward for the Digital 6 box. Any more questions, please feel free to ask.

  3. #3
    Join Date
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    Default

    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.
    http://documents.holley.com/199r10676rev.pdf (Magnetic Crank/Cam Input Filtering Parameters, Page 2)
    http://forums.holley.com/showthread....4450#post54450 (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
    http://www.electronicproducts.com/El...g_for_you.aspx (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 T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  4. #4

    Default

    Quote Originally Posted by thecowwatcher View Post
    In short answer, yes. But are you wanting to control the timing with the Sniper? The Sniper instructions are fairly straight forward for the Digital 6 box. Any more questions, please feel free to ask.
    Thank you Sir. I have the download of the 4500 Sniper thanks to Danny. I picked up a Holley Dual Sync distributor, so I can plug & play with the Holley unit.

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