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Thread: Progressive Linkage makes Sniper EFI WAAAY Better

  1. #141

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    I installed the progressive linkage and made the appropriate changes via the touchscreen. Works great, take-off from a stop is MUCH smoother. Love it!

  2. #142

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    One thing to notice when you look at the V5 TBI85SB245HE.hefi calibration is that Holley themselves don't actually don't have the progressive throttle linkage activated and functioning.
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    Last edited by Moparmatty; 07-18-2019 at 09:08 AM.

  3. #143
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    Yeah, it's wrong, but you don't need it anyway. Just follow post #140 above, and program your Config File correctly.
    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.

  4. #144

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    Quote Originally Posted by Danny Cabral View Post
    Yeah, it's wrong, but you don't need it anyway. Just follow post #140 above, and program your Config File correctly.
    I can setup the EFI software no problem. My question is why are we worrying about enabling the progressive throttle linkage in the software when Holley doesn't use the feature on their higher end Terminator TBI systems that have progressive throttle linkage?
    Last edited by Moparmatty; 07-18-2019 at 10:07 AM.

  5. #145
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    Quote Originally Posted by Moparmatty View Post
    ...on their higher end Terminator TBI systems that have progressive throttle linkage?
    No. The Terminator TBI unit has a non-progressive (1:1) secondary throttle linkage, and operates all four injectors (even at idle). Yes, the primary throttle blades open a little bit before the secondaries, but that's to account for idle speed screw settings on different applications. Otherwise, if it's exactly 1:1, any little idle speed screw adjustment will also open the secondaries the same amount. The Terminator TBI unit operates all four injectors (even at idle).
    https://forums.holley.com/showthread...7417#post87417 (Related Forum Post)

    FYI: It's the end users responsibility to ensure their Global Configuration File is programmed correctly.
    http://forums.holley.com/showthread....ents-Read-This (Initial Checks & Adjustments - Read Step #1!)
    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. #146

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    Does anyone have experience using the progressive linkage in a boosted application with a good amount of boost & HP? I'm curious how the fact that the engine will go from the low fuel demand to an extreme amount of flow very quickly (especially with a quick spooling turbo or PD blower) will affect the point where secondaries will need to open and if a lean condition could be created.

  7. #147

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    If you are concerned about the progressive linkage, just leave the linkage alone, but add an extension to the throttle connection lever to cure the “touchy” throttle response of the Sniper. That's what I did for my boosted application. It is easier for us because we don’t have to worry about the air cleaner clearing the extension due to the small size of the hat. The extension works fantastic with no reprogramming required.

  8. #148

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    I left my linkage 1:1 on my Super Sniper also. After 16 years of blow-through carbs on all of my turbo engines. They all ran and performed better with the 1:1 linkage. On Gas & E85.

  9. #149

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    Thanks, it sounds like keeping the 1:1 will save some messing around. I'm coming from a Roots blower/carb setup to the Sniper/single turbo.

  10. #150

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    I just put my progressive linkage on that’s been sitting on my work bench for months. It’s part number 43-2. Everything operates smoothly and secondaries seem to fully open. Odd thing though, if I look at the TPS % right as the secondaries start to move a fraction of a hair; it’s only 18%. That seems much earlier than most others have reported. I’d actually be happy with this, as it would take the edge off the throttle feel, but bring in the secondaries just above my average cruising throttle position. Just curious of other people’s reactions to this.

    One thing I noticed is that the QFT 43-2 on EFISystemPro.com is straight, and the 1:1 has an elbow in it. My QFT 43-2 has an elbow, too. Just much less than the 1:1 Sniper linkage. I have a magic unicorn in between linkage. Maybe it’s an older version that’s been on the shelf for a decade.
    Last edited by HeavyChevy; 10-01-2019 at 10:14 PM.

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