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Thread: Progressive linkage install help.

  1. #1

    Default Progressive linkage install help.

    Tonight I got the progressive linkage installed on my Sniper, hoping to get away from the "touchy" throttle. I don't have the hard pedal feel, but the car really jumps with very little throttle, it's a 383 with a T5. Install was easy, secondaries start to open at 41%. Enabled progressive in the software (latest firmware installed) and took it for a ride. Everything is OK until the secondaries start to open, then it goes very lean and falls on it's face. I drove it around for a while trying to give it time to learn, but it never really cleared up. I'm moderately comfortable with the EFI software, but not sure where to start with this one. Here's a short datalog of it happening: https://www.dropbox.com/s/e6l447pp0m...inkage.dl?dl=0. Thanks.

  2. #2
    Join Date
    Nov 2014
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    Ont. Canada
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    Always post your Config File with your datalogs. Look at your fuel flow in your datalog. It should be a lot smother than it is.

  3. #3

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    Thank you, here's the Config File: https://www.dropbox.com/s/aqxo1nx8bb...18.sniper?dl=0

  4. #4
    Join Date
    Nov 2014
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    Look at your fuel flow & MAP traces. The MAP is very erratic. It's causing the fuel to jump all over the fuel table. Also, you're using the "Simple" type for your Target AFR. This puts your Target AFR in this problem area at 14:1. Set your Target AFR table to "2D Table". Then you can make this area a little richer to see if it helps.

  5. #5
    Join Date
    Dec 2009
    Location
    Connecticut
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    Originally Posted by Danny Cabral
    The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software:
    In the Sniper EFI software (LINK), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple").
    The Target Air/Fuel Ratio Table & Base Timing Table can then be properly configured & tuned for any engine.
    https://www.holley.com/support/resou...Fuel_Injection (Sniper EFI Software & Holley 558-443 CAN/USB Dongle)
    https://forums.holley.com/showthread...679#post100679 (Sniper EFI Optional Comm/Data Cable Accessories)
    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.

  6. #6

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    I’m getting the exact same thing. AFR was great before the progressive linkage. Now it jumps to 25:1 if I floor it. Hoping you figure it out, so I don’t have to. LOL.

  7. #7

    Default

    I moved the progressive setting from 41% to 42.5% and the car feels good again. I also changed the Target AFR to be 2D Table in place of Simple like mentioned. Datalog now looks a little rich when the secondaries kick in, not sure if this would be normal or not. What would cause the MAP to be erratic?
    Datalog: https://www.dropbox.com/s/c0hb1i1eli...%20425.dl?dl=0
    Config File: https://www.dropbox.com/s/zikfxat139...18.sniper?dl=0
    Appreciate your time.

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