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Holley Sniper EFI
So, anyone running the Holley Sniper EFI on thier engines? Does it work good? Any changes needed to make it run other than the O2 location in the manifold?
Thinking of upgrading for one on my OMC 5.8 in my restored Bayliner 2755. |
Gonna make that bayliner run good. There was a guy in town here who did the same thing but traded it for a huffy 10 speed. I will check with him and see if I can get him to post with results etc.
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That would be great if he could! Think it would work really good.
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a guy at my marina asked me about installing them on the 454 engines in his 43 foot cruiser,he said he hates the q jet carbs and wants to make them run like his late model chevy pickup.
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Originally Posted by mike tkach
(Post 4591998)
a guy at my marina asked me about installing them on the 454 engines in his 43 foot cruiser,he said he hates the q jet carbs and wants to make them run like his late model chevy pickup.
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To OP what is the real reason for going efi. Throttle response, hard starting, fuel economy, smoother idle??? Couldn't find any problems with the sniper efi system however just don't want you to have expectations etc and this not be your answer. I definately would call holley tech and find proper location for the o2 sensor as it sounds like that's that only issue anyone's really had. I assume you checked out the holley efi sniper forum. I'd call tech and give him your exact application and components and go from there.
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I'm not running the Holley Sniper, but I do have the older Holley Commander 950 system on my blower motors. They were built by Keith Eickert, so I think that says enough. He does use the EFI Technologies computer to run everything, but I see no reason why there would be a problem with the stock Holley computer. I've not run them in my boat yet, but I think you are safe to go with the Sniper kit. You will need to have an O2 bung in one of your pipes, but thats not a big deal. If you're planning on using stock exhaust, it's not going to work, you are going to need stainless tails, and you must keep the O2 sensor dry.
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Originally Posted by Baja Rooster
(Post 4592016)
And did it work as hoped?
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Originally Posted by getrdunn
(Post 4591841)
Gonna make that bayliner run good. There was a guy in town here who did the same thing but traded it for a huffy 10 speed. I will check with him and see if I can get him to post with results etc.
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Originally Posted by endeavour32
(Post 4592024)
I'm not running the Holley Sniper, but I do have the older Holley Commander 950 system on my blower motors. They were built by Keith Eickert, so I think that says enough. He does use the EFI Technologies computer to run everything, but I see no reason why there would be a problem with the stock Holley computer. I've not run them in my boat yet, but I think you are safe to go with the Sniper kit. You will need to have an O2 bung in one of your pipes, but thats not a big deal. If you're planning on using stock exhaust, it's not going to work, you are going to need stainless tails, and you must keep the O2 sensor dry.
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OP has a Ford 5.8L, not sure if they make an adapter for that.....but maybe he knows a machine shop guy ?
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Originally Posted by mike tkach
(Post 4592035)
wait,he traded a boat for a bicycle?
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Originally Posted by SB
(Post 4592038)
OP has a Ford 5.8L, not sure if they make an adapter for that.....but maybe he knows a machine shop guy ?
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Remote start on a cold morning ? :)
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Can the sniper lock a tune just for the idle circuit and go closed loop at 1500rpm and above? I don’t think the op needs it for his application, but have read that’s a handy feature on the bigger engines.
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Thanks for all your input guys! The OMC 5.8 is freshly rebuilt with new pistons, flo tek heads, new camshaft, roller rockers, Weiland manifold. My main reason is easy starting, get ride of smelly fumes due to improper carb settings. Don't really want to mess with jetting, more of a computer guy that likes to fiddle with software instead. Also the carb has been rebuilt and set to the stock specs, which seam to be a bit of right now. As for the O2, its no problem, I will water cut a spacer and then machine it on my mill. I was planning on doing the spacer with a slight rise as the spacers that are around mounts it horizontal which is what kills most O2 sensors as moisture gets trapped in it and the burns up when you apply voltage to it.
Do you think it would be safe to use a Sniper as it injects fuel above the throttle plates? |
all tbi's and all carbs put the fuel in above the throttle plates.
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Yeah figured that also, but a seller claimed that this would make the sniper less safe than the Terminator unit from Holley. Not saying that the terminator wouldn't be a better option, but terminator would put this project out of the budget.
What about the controller in the sniper, would there be a problem with this as its not epoxy sealed. Can it be sealed with a gasket to keep it dry from moisture and out of explosion risk? Maybe its already, dont know... I'm in brachish water so oxidation isn't to much of a problem, but going with the coated units would properly be the best option. Thats pretty much the concern I have before pulling the trigger on this project. All the other bits I can pretty much work around. |
IF your that concerned, get on Holley's tech line and ask them, no one knows their product's better. I think there are two versions of the snipper,
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As of now there is only one version.
they arnt making the 8 injector one yet.At least as if two weeks ago. Biggest thing is keeping the o2 sensor dry. I was also told by tech support that you could lock in a tune but they prefered you to not and to use the O2 sensor feedback. |
wondered the same thing...I have talked to a couple people that tried the FITEC and seems to be a crapshoot, some worked some did not so ???
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Originally Posted by ezstriper
(Post 4593440)
wondered the same thing...I have talked to a couple people that tried the FITEC and seems to be a crapshoot, some worked some did not so ???
With the sniper as long as you locate the o2 sensor where it gets good feedback and stays dry long enough to get a good tune you could lock it so even if the o2s get wet it still runs good. I think mercruiser does this on there mfi's |
Originally Posted by Warship2k15
(Post 4593442)
After looking into them.The fitech wont lock a tune so if you get any mosture on the o2 you are just outta luck.
With the sniper as long as you locate the o2 sensor where it gets good feedback and stays dry long enough to get a good tune you could lock it so even if the o2s get wet it still runs good. I think mercruiser does this on there mfi's |
I think in stock type engine as long as you can get a 02 to live should be a great setup...looked into the FITECH but seems that is hit or miss...some work great others a nightmare
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2 Attachment(s)
I picked these up about a month ago, guess I'll be learning the Holley EFI..........probably run my carbs next yr. then switch it all out
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Originally Posted by ezstriper
(Post 4594477)
I think in stock type engine as long as you can get a 02 to live should be a great setup...looked into the FITECH but seems that is hit or miss...some work great others a nightmare
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Im going down the same road as the OP.
Stumbled across this. martincoadvertising.com/oxygen-sensor-adapter-for-marine-water-jacketed-exhaust-manifolds/ sorry, I'm not allowed to post a link until I have 10 posts, but you get the point. |
Originally Posted by F-2 Speedy
(Post 4594493)
I picked these up about a month ago, guess I'll be learning the Holley EFI..........probably run my carbs next yr. then switch it all out
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Originally Posted by turbos230
(Post 4596175)
Can you tell me the model number of that manifold and the fuel injection kit, that has the injectors in the manifold? All I see are the holleys with the injectors in the throttle body area.
the holley kits come with no injectors, you need to size them to your build |
Late response, but I contacted Holley tech line and their response:
Thanks for contacting Holley Tech Service. One of the benefits of using any Holley EFI system is that it self learns and tunes on its own. In order to do this, it heavily relies on proper O2 sensor placement. In order for it to work as designed the O2 sensor has to be installed in a dry exhaust system and needs to be placed 1-10in from the collector in the headers. One of the biggest reasons none of our EFI systems are USCG approved is because most marine applications have a wet exhaust system which will prevent the system from working as it is designed to do. In closing, as long as you can install the O2 sensor per the instructions and you have a 100% dry exhaust system then there is no reason why the Sniper wont work. However, seeing as the Sniper EFI was not designed to be put on a marine application then I cannot recommend using the system on your boat. The only real safety concern is if the return line or the feed line develop a leak then you could run into a serious fire hazard. |
In a nut shell, Yes.....installed correctly
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Originally Posted by Gimme Fuel
(Post 4594519)
The FITECH are a really slick setup. I just wish they would either allow you to lock in a tune or they would make a version without the internal computer that would just act like a really nice TBI unit that a person could wire to Holley, MEFI, etc. computers.
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Originally Posted by Gimme Fuel
(Post 4594519)
The FITECH are a really slick setup. I just wish they would either allow you to lock in a tune or they would make a version without the internal computer that would just act like a really nice TBI unit that a person could wire to Holley, MEFI, etc. computers.
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Originally Posted by Brannmark
(Post 4597031)
Late response, but I contacted Holley tech line and their response:
So basically, watch the placement of the O2 sensor and the fuel lines and this should work? That’s no different then a carb with a wideband set up. I installed my wideband last season to see if the sensor would survive before moving to FI and so far all is good. I installed the sensor at 12oclock on top of the collector and using the innovative heatsink to help protect the sensor as well. |
Yeah thinking it might be good to mount the O2 sensor from the top of the riser like you said. Will have to measure that it will fit under the hatch.
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Anyone bolt the sniper efi on yet? How did it work for ya
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Originally Posted by Brannmark
(Post 4591806)
So, anyone running the Holley Sniper EFI on thier engines? Does it work good? Any changes needed to make it run other than the O2 location in the manifold?
Thinking of upgrading for one on my OMC 5.8 in my restored Bayliner 2755. |
https://cimg1.ibsrv.net/gimg/www.off...0c7ce44856.jpg
Originally Posted by F-2 Speedy
(Post 4594493)
I picked these up about a month ago, guess I'll be learning the Holley EFI..........probably run my carbs next yr. then switch it all out
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Late reply.
Since everyone is discussing O2 sensor replacement and no one has posted this solution I will.
A company called Performance Fuel Injection Systems makes an O2 plate that bolts between the manifold and the riser and fits a standard threaded WBO2 sensor. They have them for all engine makes and they mostly sell them on Ebay for about $85 with gaskets just search Ebay sellers for "performancefuelinjectionsystems". They'll work on any EFI system out there: Holley, FiTech, their own conversion, etc. Michigan Motorz also sells an O2 adapter flange. Now we can all go EFI |
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