What improvements?

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They added the "2" after the name

Electronics still unit-based, not remote so heat is still an issue to me...

OVERVIEW
The #1 EFI conversion system just got better! Introducing Sniper 2 EFI - a self-tuning, easy-to-install, EFI conversion for common 4-barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI conversion more simple, reliable, and modern. Like all Sniper EFI systems, Sniper 2 is designed to work with the Sniper Ecosystem that includes Hyperspark ignition, complete fuel systems, multiple user interfaces/dash displays, and more.

New for Sniper 2 is the optional Power Distribution Module (PDM). This cost-effective and optional accessory isolates the core of your EFI and ignition wiring into one, easy-to-use location. Simply slide the stripped wire ends under the positive lock connector and tighten down the set screw. Battery and a switched 12-volt source is all that's required from your vehicle to power the PDM and your Sniper EFI.

Make your classic drive like a modern fuel-injected vehicle, including easy cold starts, smooth drivability, and improved fuel economy! Sniper 2 is designed to be installed at home in your garage with limited tools and the support of Holley's comprehensive installation manual and videos. The user-friendly setup wizard allows you to answer a few simple questions about your engine and the system will begin self-tuning with no laptop or tuning experience required.

If you're looking for a high-performance fuel injection system that delivers power, efficiency, and ease of use, look no further than the Sniper 2 EFI.
Features:
Main Features
All new design – the #1 EFI Conversion just got better!
Only four wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
Calibration wizard only requires that you answer a few simple questions about your engine to create a base map and begin self-tuning – No laptop required
Supports up to 650hp naturally aspirated or 575hp on boost with four 100 lb/hr injectors
(NEW) Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)
(NEW) Redesigned throttle shaft and plate geometry for a smoother throttle feel
Sniper 2 is Part of the Sniper EFI Complete Ecosystem
Sniper 2 is compatible with the complete Sniper EFI Ecosystem that includes plug-n-play Hyperspark Ignition systems (coil, ignition box and distributor), fuel systems (fuel lines, fuel pump hangers), multiple displays and more
(NEW) Main harness includes plug-and-play HyperSpark distributor support, for integrated timing control, making your ignition setup hassle free
(NEW) Adaptors for other ignition types sold separately: 558-329 CD Box to Sniper 2, 558-330 MSD Pro Billet / Crank Trigger to Sniper 2
(NEW) Wide Variety of tuning and gauge display interfaces: from a 3.5-inch full color LCD Handheld, 5-inch Digital Dash, or the Bluetooth dongle, which allows you to connect either an iOS or Android based cell phone to your Sniper 2
(NEW) Optional Power Distribution Module (PDM) further simplifies wiring, especially when used in conjunction with an ignition system
Available with fuel system kits: a complete fuel system consisting of: 20 ft. of 3/8 in. Vapor Guard Fuel Hose, Fuel Pump, fuel pressure regulator, filters, necessary hardware, and bulkhead fitting to return fuel into the tank
Additional Features
(NEW) Integrated transmission kick down provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications
(NEW) “Hidden Harness” wiring harnesses exits from the rear of throttle body for a clean appearance
(NEW) Inputs and outputs consist of: 2x Ground Inputs, 2x Ground Outputs, 1x TPS output (0-5v), and 1x Tach Output
(NEW) Redesigned injector connector for improved reliability
(NEW) Onboard contactless magnetic TPS sensor ensures an accurate TPS reading
(NEW) Next Generation mil-spec style M8 positive lock connector for CAN1 and CAN2 provides the latest in CAN bus technology for a simple yet robust connection
(NEW) Cast-in fuel crossover from the primary to secondary fuel rail
(NEW) Sniper 2 throttle bodies are serialized in house, which provides each unit a birth certificate for an improved customer service and warranty experience in the event of any unit needing to be inspected
The included genuine Bosch LSU 4.9 wideband oxygen Sensor provides real-time fuel map learning
Included clamp-on oxygen sensor kit ensures a leak free oxygen sensor installation with stainless steel T-Bolt clamps and a stainless steel weldable oxygen sensor flange
Patent Pending

 

This is immediately interesting to me, since my dumb azz decided to go with a carb on my LS. It would sure be nice to have a "carb-style" injection at some point in the future to carry on the look. Being able to crank 575hp through that kit with forced induction is more than enough to meet my needs, too.

 

Yeah, for sure they definitely added some much-needed tuning and additional attributes that will make this setup far superior to the original Sniper. Having a 575hp threshold for a blow-through EFI is really awesome too. I gotta wonder if it's E85 compatible.... Thinking no intercooler for a blow-through would be the best!

 

I was excited to see the upgraded sniper 2. One drawback is that it needs a hyperspark distributor. Makes for a better package but add to the cost

 

No the hyperspark is not required with the sniper 2. It can still just run off the coil negative and not control the timing. Same the original sniper. I have our Dart set up like that and it works fine.

 

I have the original sniper unit, no return fuel pump in tank. SBC 400 HP and so far works like a charm in Mississippi HEAT. Took a little drive today, 98 degrees, 115 heat index in traffic. No issues.

If your a visual person: Holley Sniper EFI 550-511-3XX Holley Sniper 2 EFI - Black

 

I need to clarify because i originally misunderstood. With the sniper 2 it will work with other distributors. If you want to control timing with it you need either the hyperspark distributor or a cam sync. With the original sniper it could control timing with a msd distributor.

 

I’ve been digging through the user books trying to determine if I can use this with my msd-6014 for my LS. Could it be as simple as using the “tach out” from the msd to the “crank in” of the efi? I have a carb for it but this has my interest. It will pick up my fuel pump and fan control too. I noticed in the MSD doc that it has an IAC enable (assuming for efi) function which allows the timing to assist with idle control. I wonder how that works. 🤔

 

I'm digging this back up, because I had the exact same thought last night. Let me know if you hear/see any more info, because this is exactly what I would like to do.

 

@xMLMx Sniper EFI with MSD LS 6014? - Holley Performance Products Forums

Hope these help. Good forum! Just go there and type in your question if these don't do it for ya! Sorry I don't have a direct answer for you though, I'm not an LS guy (yet) but hoping these do it.

 

The folks at Holley finally responded to my inquiry. No explanation as to “why” it wont work. Quick to recommend the unit that costs twice as much though. Not feeling too confident this is sound advise but…it is what it is.

“Thank you for contacting Holley Performance. I can not recommend using the Sniper 2 on an LS engine. If you want to do this, I would recommend the Terminator X Stealth system.”

 

Thing is, you can use any carburetor or any electronic throttle-body-type FI system on any internal combustion engine. Period! Yes, some are easier to graft than others but it's only a matter of ingenuity, not the actual system itself. That's what hot rodding is all about, bootlegging! We have been splicing and grafting parts from other cars and trucks into our vehicles to enhance them for decades and now with so many choices, we can do damn near anything we want! The Tach-out from the unit would be enough signal I would guess... Only to have to insure the RF from the rest of the system does not interfere with the clean signal for your ignition.

I gotta just say, I have not had one bit of good customer service from the Holley group in the last 8 years. Their product QC and customer service has gone off the deep end and we cannot any longer blame COVID... It is the corporate bean counters and the profit margins of the stakeholders.. It's always been that way but when $ is more important than quality, we all need to look elsewhere for better products and service so they get the message. That we keep buying this tripe just reinforces their behaviors.

That'll be $0.50, please (sorry, inflation... )

 

Quick to recommend the unit that costs twice as much though.

And there ya go!

 

I use my Fitech on my 72 GMC. 5,3 with a carb manifold and the 400 hp Fitech. My old 63 wagon had the same setup but was the 600 hp Fitech. Both worked well together. Both are NA but they have units for power adders.

 

I should have included my original email for context. You be the judge on their response. Im guessing the person who answered the question knows very little about engines, cars and enthusiasts.


“Good afternoon,


I've looked over the installation documentation for this product and it appears that it will work for my application however, I wanted to inquire to confirm.

I have a carbureted LS2 engine using an MSD-6014 ignition system. I'm considering converting from the carburetor to the Sniper2 EFI. Current carb is Holley Ultra XP 750 and the engine is making 500HP/500TQ.

If I understand the installation and required electronic integration correctly, I would use the tach output of the MSD-6014 as the engine speed input for the Sniper2 EFI? The tach output of the Sniper2 would drive my tachometer gauge? I believe it would be beneficial for the optional power distribution block to accommodate a common switched ignition, electric fuel pump and electric fan controls? Thank you.”

 

I would post your question on:

Got Sniper datalog, now what? - Holley Performance Products Forums

I got lots of help on that site.

 

I would post your question on:

Got Sniper datalog, now what? - Holley Performance Products Forums

I got lots of help on that site.

I'll give it a try. Had to register for the site and waiting on approval.

 

Posted wrong link. Use this one if interested. Home - Holley Performance Products Forums

 

@kimmer71 if you want reliability, stick with the carb. Period. Run the MSD box the way you normally would, tune it the way you used to, call it a day. If you head out on the road, you're only a carb swap away from being in the road again, or less. Sniper has proven itself to be unreliable with so many issues, whatever anyone says about their sniper, anecdotal response has no place in statistical analysis in reliability. The % of faulty or failed sniper components is beyond a NHSTA mandated recall if this were an OEM part. Yes, I know people love their sniper systems but confirmation bias is merely cognitive dissonance, nothing else. It's a bad way to make a decision.

"Just a thought, have a nice day "
~Beau

Catch my drift, beo?

 

@kimmer71 if you want reliability, stick with the carb. Period. Run the MSD box the way you normally would, tune it the way you used to, call it a day. If you head out on the road, you're only a carb swap away from being in the road again, or less. Sniper has proven itself to be unreliable with so many issues, whatever anyone says about their sniper, anecdotal response has no place in statistical analysis in reliability. The % of faulty or failed sniper components is beyond a NHSTA mandated recall if this were an OEM part. Yes, I know people love their sniper systems but confirmation bias is merely cognitive dissonance, nothing else. It's a bad way to make a decision.

"Just a thought, have a nice day "
~Beau

Catch my drift, beo?

You really can't say that without knowing how many Holley sold and how many failed due to manufacturing defect not user error. People are many times more likely to report problems than satisfaction.

 

This is once I somewhat disagree. In analytical analysis every case in included, good, fair and bad. The only response one can give is their "personal" experience. With Holley mine has been good. Now, I don't like what can be a lengthy wait on the phone for tech service, reduced hours during the week and no weekend availability but I have always received a call back. Have also found Holley receptive to warranty provisions, even when the part was passed their warranty period.

The response Kimmer got was not Good, it was Bull. The response didn't even address his question.

Now I do have an issue which I'm working on and resolution of that, might change my opinion. As far as my opinion, it's really only has value for ME.

 

I was finally able to post a question on the Holley forum. Follow along here:

Sniper 2 on an Carbureted LS2 with MSD6014 Ignition? - Holley Performance Products Forums

Hello, I'm a new member on this forum. I'm interested in converting to EFI. I've looked over the install documents for my MSD6014 ignition and the Sniper 2 EFI and it looks (on paper) like it would work just fine. I contacted Holley sales support and they indicated that they "would not recommend...

forums.holley.com

 

So far, I'm getting some "puzzled" responses echoing what I think Andy was relaying with the exception that the consensus feels full MPFI is the only way to go. If I'm reading between the lines correctly, it seems like there are no serious pitfalls to doing a Sniper 2 with the MSD6014 ignition...so that's a plus.

 

I'm still researching this topic. I looked over the Atomic 2 product this morning. It has roller bearings in the throttle shaft, and I think it uses a different sensors and/or injectors. They do mention that it can support forced induction. It costs about $150 more. It seems like a better quality product due to better components compared to the Sniper 2, at least that's my impression from watching the videos and looking at the literature.

Atomic 2 EFI - Holley

The EFI crowd overwhelmingly prefers MPFI, but if you are trying to make low end torque, a case can be made for a TBI on a DP intake, especially for a street driven car. At least that's my opinion until someone convinces me otherwise.

 

Now I’m looking at the Hly Term X Stealth, as Hly support suggested. It’s looking like it may be the better solution for my application. I’m not getting the impression that the TermX is as problematic as the Sniper products. Thats going cost about $600 more at roughly $2k. I misquoted that increase in cost earlier in this thread. I think I said “double” the cost, but it’s not that much. Timing and fuel through one interface makes sense. Also, I think i would prefer getting it all installed initially, rather than after the car is done, wiring wise. They actually sell an “LS” kit which will pick up the OEM coils. I don’t think they are multiple spark discharge though.


Holley EFI 550-1021 Holley EFI Terminator X Stealth GM LS 4150 - Black

Here is a good video. A bit old, but still good.

 

We had a new 383 SBC installed late in 2022 and struggled all this year with the damn Sniper 1. Way too much noise under the hood. Grounds, shields and special config's could not seem to fix the backfiring, wild idling, and uneven cruising this whole year. And we are running mechanical timing. AFR was all over the place and so was the IAC trying to compensate.
Engine builder (Pat Neyes) finally got Holley's attention and they offered up a Sniper 2 to replace it. $00
What a world of difference! Idle is now normal, cruises evenly and spins the tires off the car from a dead start.
Now we have a new car that is fun to drive and with 3" exhaust, it sounds really pissed off. Love it.

 

That is excellent to hear. I am starting to save for one.