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Thread: Spark Plugs

  1. #1

    Default Spark Plugs

    Any issues going with a non-resistor plug using the HP EFI and DIS from Holley? Thanks.

  2. #2
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    Quote Originally Posted by Velocity540 View Post
    Any issues going with a non-resistor plug using the HP EFI and DIS from Holley?
    You should use resistor type spark plugs with an EFI system, to suppress electrical noise/interference.
    (Unless it's a race only application and the non-resistor plug is the only heat range & dimensions available.)
    Also, certain spark plug wires (such as FireCore50), transmit far less electrical interference than other
    brands (low resistance and impregnated with ferrite molecular compound used to absorb RFI/EMI).
    http://www.yellowbullet.com/forum/sh....php?t=1325290 (Additional Information - Doug F., Chief EFI Engineer @ Holley)
    NGK also offers spark plug resistor caps to use with non-resistor type spark plugs:
    http://www.ngksparkplugs.co.za/produ...resistor-caps/ (NGK Spark Plug Resistor Caps)
    http://www.ngkpartfinder.co.uk/files...lug_Covers.pdf (NGK Spark Plug Resistor Caps)
    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/3000 RPM converter, 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 MT tires.

  3. #3
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    You can also buy resistor boots from companies like NGK, that have the resistor built into them.
    So you can run a non-resistor spark plug, but still get the RFI/EMI suppression of a resistor spark plug.
    Some ignition coils, such as the LSx coils, don't like a non-resistor plug. The IGN1A coils do not care.
    http://www.ngksparkplugs.com/product...s.asp?mode=nml
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

  4. #4
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    S2H, thanks for the link.
    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/3000 RPM converter, 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 MT tires.

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