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Thread: Sniper EFI Question

  1. #1

    Default Sniper EFI Question

    Hi guys. Will the Sniper EFI be OK on a stock Ford 289 V8? It's really only making around 200-220 HP right now. Will I have any issues with idle, etc., since it's lower HP? Also, what is the female thread of the fuel in & out where the fitting screws onto on the Sniper? -6AN o-ring? Thanks.

  2. #2
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    Quote Originally Posted by chiseledperformance View Post
    Will the Sniper EFI be OK on a stock Ford 289 V8? It's really only making around 200-220 HP right now. Will I have any issues with idle, etc., since it's lower HP?
    That's on the low side. Contact Holley Tech Service (LINK) to confirm.
    Page 2 of the Sniper EFI Quick Start Manual states the horsepower must be between 250-650.

    Also, what is the female thread of the fuel in & out where the fitting screws onto on the Sniper? -6AN o-ring?
    It's all -6AN fittings. Read the manual for full details.
    http://documents.holley.com/199r11031r.pdf (Holley Sniper EFI Instruction Manual - For my own reference.)
    http://documents.holley.com/199r11193.pdf (Holley Sniper EFI Quick Start Manual - For my own reference.)
    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

  3. #3

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    Thanks Danny. Yeah, I read the manuals, I know it comes with -6 fittings for the in & out. But I wanted to know what size thread are on the actual Sniper body where these -6 fittings thread onto, as I'm going to need new fittings to adapt to the lines already in the car. The manuals do not have this info. This is for another project we are changing over to, not the 289. I do not have the unit here yet, so wanted to order fittings before. Thanks.

  4. #4
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    Quote Originally Posted by chiseledperformance View Post
    Thanks Danny. Yeah, I read the manuals, I know it comes with -6 fittings for the in & out. But I wanted to know what size thread are on the actual Sniper body where these -6 fittings thread onto...
    I don't know for sure, ask Holley when you call.
    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

  5. #5

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    Will do, thanks!

  6. #6
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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

  7. #7

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    If it's a -6 AN o-ring fittings, thread size is 9/16-18 for the end with the o-ring.
    I know because I had to shorten one of the fuel rails on my multi-port installation.

  8. #8
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    Yeah, I know that's the -6AN o-ring thread size (LINK), but it just looks bigger in the Sniper picture. So I didn't want to risk giving him the wrong information.
    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

  9. #9

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    Holley just confirmed it's a 9/16-18 thread on the actual throttle body, which is a −6AN o-ring, in case anyone needs to know. Thanks guys.

  10. #10
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    I thought so, but thanks for confirming that. Did you ask if the Sniper supports 200 horsepower?
    EDIT: Page 2 of the Sniper EFI Quick Start Manual states the horsepower must be between 250-650.
    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

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