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Thread: Magnetic & Hall-Effect Crank/Cam Sensor Setup

  1. #71
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    You're welcome.
    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

  2. #72

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    "Case 4: Using a 1 Pulse/Fire Crank Trigger with a Factory GM LSx 1x Cam Pattern
    To properly phase the cam trigger location in reference to cylinder #1 compression stroke, setup the configuration as follows:
    Engine Firing Order = 7-2-6-5-4-3-1-8
    Ignition Reference Angle = Set between 40°-60°
    Cam Sensor Type = Single Pulse
    Sensor Type = Digital Falling"

    Danny, can you elaborate why we use this Firing Order for an LS with 4x MSD crank trigger & 1x Cam Sensor?
    I understand that it is the same Firing Order, but why do we start the computer at #7 rather than #1? Thanks!

  3. #73
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    Because the cam sensor doesn't signal at the proper time, when using an MSD 4x crank trigger kit.
    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. #74

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    Gotcha, thanks!

  5. #75
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    You're welcome.
    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

  6. #76

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    I have to reiterate, not using the key on "12V for Hall-Effect sensors (A10 I believe). This also turns on, but doesn't power the ECU. I don't know why Holley did it this way. Any issues with a sensor and the computer will shut off. Use B20 instead. Pretty sure we have toasted a Hall-Effect sensor because of this. They can't handle the voltage variation on cranking. Using B20 Hall-Effect sensors do NOT need a resistor correct? Are there any cases where they would?

  7. #77
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    Quote Originally Posted by allan5oh View Post
    Using B20 Hall-Effect sensors do NOT need a resistor correct? Are there any cases where they would?
    No resistor required.

    Custom Hall-Effect sensors and/or shielded harnesses:
    1) The ECU already has the pull-up resistor for sinking output (open collector) sensors inside, so don't add anything.
    2) The ECU already has the shield (drain) wire connection/pin grounded inside, so don't ground it at the sensor end.
    Think of the shield wire as an antenna pointing to the sensor; it's only supposed to be grounded at the ECU end.
    http://www.newark.com/pdfs/techartic...haWire/USC.pdf (Shielded Wiring - look for "drain wire" on page 2 & 3.)
    http://forums.holley.com/showthread....3598#post53598 (Wiring Additional Sensors - Holley HP & Dominator ECUs)
    Originally Posted by Danny Cabral
    Crank & Cam Sensor Wiring Tips:
    The 10-pin Ignition Connector has one "Chassis Ground" (loose black wire ground) and two "IPU Grounds" (clean ECU ground). Don't use "Chassis Ground" to ground an ignition module (or crank & cam sensors). It's quick & easy to move the ignition module ground wire from (cavity) pin D "Chassis Ground" to pin C or G "IPU Ground", where it should be.

    If you don't have the actual Metri-Pack terminal release tool, a "safety pin" will work.
    It just needs to be a stiff wire between .030"-.035" in diameter to release the terminal tab.
    Then reopen (bend) the terminal tab before reinsertion, so it will clip (lock) into the cavity.
    http://www.whiteproducts.com/removal_tools.shtml (T-6 Micro Terminal Release Pick Tool)

    Also, don't use (cavity) pin E "Switched +12V" from the 10-pin Ignition Connector, to power an ignition module (or crank & cam sensors), unless you've modified the wiring source to connect from pin B20 - EST 12V Output (P1B ECU Connector). This LINK explains why & how to do it.
    http://documents.holley.com/techlibr...10555rev17.pdf (Holley EFI Wiring Manual, Sections 2.1 "Pin-Outs" & 13.0 "Wiring Appendix")
    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

  8. #78

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    That's what I thought, thanks a ton Danny!

    Don't use "Chassis Ground" to ground an ignition module (or crank & cam sensors).
    What do you mean by ignition module? A MSD CDI box? Holley's CD relay? Individual coils? All of the above?
    Last edited by allan5oh; 07-02-2018 at 11:29 AM.

  9. #79
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    Quote Originally Posted by allan5oh View Post
    That's what I thought, thanks a ton Danny!
    You're welcome.

    What do you mean by ignition module?
    Example: A distributor with an internal ignition module (I.E. Ford TFI, GM HEI, etc.).
    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

  10. #80

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    So anything external go to battery ground. Thanks.

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