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Thread: Distributor versus ECM controlled spark

  1. #1

    Default Distributor versus ECM controlled spark

    I'm running a small block Chevy with a mild street cam and headers. I'm currently using my conventional distributor converted to Pertronix breakerless ignition. The engine idles at 700 RPM with IAC fluctuating between 2 & 6% and TPS at zero. The engine stumbles between idle and engaging the clutch. The current ignition timing advance is set at 15° advanced at idle and 15.5° cranking. My timing light shows 9° BTDC at idle.

    Do the ignition timing advance settings influence tuning if ECU is not controlling timing? Should I just bite the bullet and get a new distributor that allows ECM to control timing? Any suggestions would be appreciated.

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    26,987

    Default

    If this isn't an ECU controlled timing application, simply ignore all timing related parameters (and disable Idle Spark control). Yes, ECU timing control is always beneficial.
    http://forums.holley.com/showthread....ents-Read-This (Initial Checks & Adjustments - Read Step #3)
    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.

  3. #3

    Default

    Thank you for the quick response. I've also noticed that I get low fuel pressure readings on the Multi-Gauge screen, with my fuel pressure regulator gauge reading 45 psi. Is there low fuel pressure, or is it that I do not have the optional fuel pressure sensor?

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    26,987

    Default

    Correct, you'd need a fuel pressure transducer.
    http://forums.holley.com/showthread....ents-Read-This (Initial Checks & Adjustments - Read Step #2!)
    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.

  5. #5

    Default

    I purchased my Holley Terminator Stealth system 12/2018. When I look at the technical data page, I don't see my system. What files will I need to download to assist in tuning?

  6. #6
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    26,987

    Default

    The Terminator EFI system (not Terminator X EFI) uses the Holley V4, V5 or new V6 EFI software.
    http://www.holley.com/support/resources/#Fuel_Injection (Holley EFI Technical Library)
    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.

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