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  •  » Has anyone installed the Holley Sniper EFI system?

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    8/18/2020 7:22 PM  #1

    Mochaman
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    From: Royse City, Texas
    Registered: 4/02/2013
    Posts: 1,492

    Has anyone installed the Holley Sniper EFI system?

    Looking at options. My carb is too small for my engine. My friend is highly recommending going the Sniper route. 

     

    8/18/2020 8:49 PM  #2

    Bolted to Floor
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    From: Houston, Texas
    Registered: 4/01/2013
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    Re: Has anyone installed the Holley Sniper EFI system?

    A new carb would be cheaper!!!!

    It won’t be apples to apples comparison for you, maybe...... a buddy installed a Sniper sequential system on his LS powered 80 Vette. He likes the way it has all went together and he hasn’t had a lot of difficulty with tuning.

    John  -- 67 Mustang Coupe 390 5 speed
     

    8/19/2020 4:22 AM  #3

    Mach173
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    From: Sweden
    Registered: 8/08/2018
    Posts: 186

    Re: Has anyone installed the Holley Sniper EFI system?

    I had 2 of them. Started the first one 2017, it run fine. After a while strange things started to happen. Run rich one day and lean the other. O2 sensor died and I changed that. Notice that my Innovate is still running 5 years. Put the carb back on. 2020 tried it again, now some sensors were starting to give up. Put the carb back on again. I have several friends ho had the exactly same problems. The idea of having the ecu in the engine bay is a big no no. It gets warm and finally the electronics are fried.

    When it runs its great more crisp then the carb
    Hard to tune with radical cam shaft the o2 sensor get fooled by the overlap
    If it brake you are stranded., it will brake in 2-3 years. O2 sensor, TPS sensor or IDLE air control valve
    To much parameters that can corrupt the system when learning
    You spend a lot of time messing around with it without driving your car
    Read the Holley efi forum on the sniper

    If I would put a new system in Il go for the proflo from edelbrock, but they dont make it for the 351c.
    The terminator from Holley with the stealth TBi is another ball game but much more expensive.

    but hey thats just me :-)

     

     

    8/19/2020 7:08 AM  #4

    Rufus68
    I FYI 24-7

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    From: Knoxville, TN
    Registered: 4/26/2017
    Posts: 892

    Re: Has anyone installed the Holley Sniper EFI system?

    I guess a lot of it comes down to how you're planning to use the car.  Carbs have worked well for countless cars across many decades.  It is hard to beat the simplicity of a carb for a person that understands how to live with them.  On the other hand, an EFI system that would be as reliable as a current factory daily driver car would be wonderful as well.  But an EFI system that is not that good would simply be a hobby in itself.  So you're back to thinking what your goals for owning the car are.

    1968 T-code Coupe with a 302.  Nice car, no show stopper for sure, but I like it.
     

    8/19/2020 7:16 AM  #5

    Bullet Bob
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    From: Montrose, Colorado
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    Re: Has anyone installed the Holley Sniper EFI system?

    Mochaman wrote:

    My carb is too small for my engine. 

    Ed, what engine and what pot are you running??

    BB1
     

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    8/19/2020 7:38 AM  #6

    Mach173
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    From: Sweden
    Registered: 8/08/2018
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    Re: Has anyone installed the Holley Sniper EFI system?

    The system is a universal system not targeted to a specific engine. It can never be compared as standard efi that comes with the car from factory. Edelbrock had a similar system, they removed it from the market and came up with the pro flo 4, intake, dizzy  matched. This eliminates a lot of problems.

     

    8/19/2020 3:40 PM  #7

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,855

    Re: Has anyone installed the Holley Sniper EFI system?

    Gotta bunch of EFI & Carb guruz on here. I am old skool and would vote for the controlled drip...........maybe cause I'm more familiar with them.  Your 'snotty ' cam will make EFI difficult......me tinkx.
    6sal6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    8/19/2020 4:04 PM  #8

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
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    Re: Has anyone installed the Holley Sniper EFI system?

    6sally6 wrote:

    Gotta bunch of EFI & Carb guruz on here. I am old skool and would vote for the controlled drip...........maybe cause I'm more familiar with them. Your 'snotty ' cam will make EFI difficult......me tinkx.
    6sal6

    That really depends on the system being used plenty of systems support big cams. Mochaman, do you have a list of things you want out of the system? That will help narrow down the systems you might consider.

    Here's the cam I run with my Megasquirt


     

     

    8/19/2020 4:37 PM  #9

    Mochaman
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    From: Royse City, Texas
    Registered: 4/02/2013
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    Re: Has anyone installed the Holley Sniper EFI system?

    My engine is a 347 Stroker with a semi aggressive CAM. I like the Carb but I didn't like the puking it did above 5000 feet elevation. Since I am maxed out on the Edelbrock carb I have now and need to get a bigger one to get out of lean, I was ecouraged by a friend to go the EFI route. I know MS is deadset against it and is suspiciously quiet on the subject.......

       •Thread Starter
     

    8/19/2020 4:38 PM  #10

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
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    Re: Has anyone installed the Holley Sniper EFI system?

    Raymond_B wrote:

    6sally6 wrote:

    Gotta bunch of EFI & Carb guruz on here. I am old skool and would vote for the controlled drip...........maybe cause I'm more familiar with them. Your 'snotty ' cam will make EFI difficult......me tinkx.
    6sal6

    That really depends on the system being used plenty of systems support big cams. Mochaman, do you have a list of things you want out of the system? That will help narrow down the systems you might consider.

    Here's the cam I run with my Megasquirt


     

    The "key" is the amount of Lobe Separation(LSA)........right?!
    6sally6
     

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    8/19/2020 4:38 PM  #11

    Coupedaddy
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    From: Katy TX
    Registered: 4/18/2013
    Posts: 317

    Re: Has anyone installed the Holley Sniper EFI system?

    I installed the sniper Holley with my new 331 for Christmas it’s only been 4 months and been in the shop after the accident since then Runs real good wish I had bought the terminator system to run factory style fuel injection which may be my Next Move but I didn’t have time to do the extra wiring because the bash was coming up lol and it got cancelled so I am doing everything now since I have a lot more time Pray all is well ! I used a areomotive fuel tank with a in tank pump Any questions give me a call Carbs got to all the previous bashes lol I have installed on mine a faile safe system that can be switch back to carb on the fly if traveling fuel pressure regulator goes from 5 psi to 70 lol just walk into auto store grab a carb and keep rolling I did install a plabonic spacer under the throttle body  to keep it cool 

    Last edited by Coupedaddy (8/19/2020 4:42 PM)

     

    8/19/2020 4:51 PM  #12

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
    Posts: 1,208

    Re: Has anyone installed the Holley Sniper EFI system?

    6sally6 wrote:

    Raymond_B wrote:

    6sally6 wrote:

    Gotta bunch of EFI & Carb guruz on here. I am old skool and would vote for the controlled drip...........maybe cause I'm more familiar with them. Your 'snotty ' cam will make EFI difficult......me tinkx.
    6sal6

    That really depends on the system being used plenty of systems support big cams. Mochaman, do you have a list of things you want out of the system? That will help narrow down the systems you might consider.

    Here's the cam I run with my Megasquirt


     

    The "key" is the amount of Lobe Separation(LSA)........right?!
    6sally6
     

    To an extent, I think if we were talking about factory speed density EFI then absolutely, but most aftermarket EFI setups are MUCH more flexible. **To clarify, some of the simpler EFI throttle body type setups might have issues and that's why I was asking what Mochaman's expectations were. Most of the mid to higher level set ups would have no problem. Heck mine only runs 6-7" of vacuum, but I can walk out turn the key and it starts no problem, it hot starts no problem etc etc. 

    One trade off in the higher end setups is that you need to do more to get the vehicle dialed in, sure they "self tune", but that to me is really just polishing off a tune that is somewhat close.

    Here's my 427 happily idling away around 14.5-14.7:1 https://youtu.be/KMOBB4Y-NBA. Besides that cam it's running 160lb injectors and the Megasquirt is good with that

     

    8/19/2020 5:45 PM  #13

    Bolted to Floor
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    From: Houston, Texas
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    Re: Has anyone installed the Holley Sniper EFI system?

    Amount of vacuum your engine has is a great point. Self learning systems should have a listing for minimum vacuum needs to operate correctly. If it’s near or less then the required minimum, the self learning system may never get it right and it wont allow tuning capabilities to make it right.

    John  -- 67 Mustang Coupe 390 5 speed
     

     

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