Holley sniper efi 2

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I can't answer to the Sniper 2, I have a Sniper stealth on a 403" stroker, with just under 100 miles so far. Given that, so far it seems to be going well. I am getting an occasional stall at a stop sign, but I have too much else going on right now and the car is up on blocks.
I did expect a bolt-on & go (given the expected pump, regulator,& wiring requirements of course). I was having fast idle problems, read and re-read the manual, called Holley support twice. Once I sat down and thought about it, the AFR was reading correct, everything else was correct.
Even though the TPS was at 0, the throttle blades weren't fully closed. The system was adding enough fuel to make the AFR correct, so it was doing its job correctly. Turns out it was the right amount of air & fuel to run at 2300 RPM. I just wrongly assumed the unit was assembled correctly. I pulled the throttle body back off, & just loosened and re-aligned the blades and idle came into perfect.
I went with a "corvette style" regulator and I am going to contact Johnny Mac about one of the adjustable rebuildable ones they sell. I seem to be having alignment problems with the o-rings in the OEM style push-on to flare fitting adapters, and keep getting a leak.
I would say if you have basic installation and troubleshooting skills, and you make sure your wiring is well done, (wire nuts and/or twist & tape doesn't fly) there's no reason it won't perform well on a 318. For the most part, It doesn't care if its on a 225, 318, 383, etc., it's job is to match the fuel to the air consumed.
 
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Thanks guys for the info. I've been doing some research on the sniper 2 and going to pull the trigger. I will let know how it feels.
318 30 over
Edelbrock rpm heads
Summit 480 cam
2800 stall
323 suregrip
Air gap intake
 
318
71 dodge dart

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Well I got the sniper 2, now I need to figure out how to add a return line back to the fuel tank. Does anyone have pictures of their tank set up. Don't want to break the bank.
Also looking to ad this.

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I’m running Sniper 2, Hyperspark, the PDM, Holley’s rank and pump. It has been perfect from the start, except for my old crappy fuel tank which is why I now have Holley’s tank, my old tank had a bunch of crap in it that I couldn’t get out. Been perfect since the new tank. You don’t need a return line for Sniper 2. It’s a great feature of the 2. What are you using for a pump? That might actually change the above. I’m using Holley’s in-tank pump which has the regulator built in. If I were doing it over I would have gotten a different tank/module, but I already bought Holley’s pump and wasn’t about to change to buy a second pump. I’m a big fan of Sniper 2 though.
 
I'm running the fuel pump that came with the sniper 2 set up. Here's my tank that dropped yesterday. I forgot I filled it before I parked it a week ago. My wife's car is full now lol

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Don't overthink the return. You just need to put a fitting in the tank in such a way that it goes through and doesn't leak. A bulkhead fitting with a rubber washer will do fine. You can even stick an in tank fuel pump on the end of your sending unit, although bulkhead wiring seals are a bit tougher.

However, some sort of baffles or a sump will prevent fuel slosh issues, which are a lot more noticeable with EFI than a carb. These can affect both in tank and external pumps. I just welded a cake pan and pipe bung to my tank for a sump. Since the fuel is now pulled from the sump, you can use the sender as the return.
 
I have just finished a Sniper 2 install on a 318 Poly. In tank returnless fuel pump. Holley pulse damper directly mounted to Sniper body. Ready to Run Hyperspark distributor. I took apart the loom provided - easy job as it has sprung nylon covering - and moved fuse and pump relay and gave the pump its own fuse.
I had to make up my own throttle linkage arrangement. It took a while to design but not long to make.

I fired up to run the wizard. Display fine but touch screen wouldn't take any input. Phoned Tech Support and after 20 minutes spoke to friendly and intelligent person with English as first language. They posted me a replacement handheld the next day. A few minutes after it arrived I was up and running.
The only down side so far is a crazy loud ticking noise from injector or injectors. Sounds like a very bad lifter.
Is this normal?


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If that is what all Sniper 2s sound like I am really disappointed that it wasn't mentioned in any of the reviews I read. It's fine for a race car but not very clever for a fancy cruiser. A bit of a let down for an otherwise brilliant product.
 
I modified my stock pickup with return line I silver soldered in place and installed a wiring connection from Radium Engineering. I opted to use a surge tank system plumbed from this adapted factory style pick-up, so the factory tank can supply air free fuel down to the final gallon in the tank. I could have just added a Holley Hydramat instead of the pumps strainer for even better fuel pick-up, as the Hydramats are available in several different shapes to allow it to pass through the sending unit opening.

I did use 2 Holley Hydramats on another EFI conversion on my '70 E-Body, but that system has a custom tank from Rick's Tanks, and uses an externally mounted pump from Fuelabs. Their pumps are amazing.

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Well I finally got the sniper going but I still not getting enough fuel pressure. I have adjusted the regalator on top and only goes up to 40. It runs for about 5 minutes or so then drops pressure and shuts off.
 
Do you lose the RPM signal before or after pressure drops? What are you using for ignition? I'm wondering if something is causing the ECU to command a shutdown (and turning off the fuel pump) or if the pressure drop is causing the shutdown.

Injectors click, but it's odd for them to tick. The sound should be inaudible with the hood closed.
 
The knocking noise from my Sniper 2 is clearly audible from yards away with the hood closed. It would be good to hear from anyone with a quiet example just to know it's possible. I was wondering whether to disconnect individual injectors one after the other to see if there is one that is much worse than the others.
The original sniper had dodgy electrical connectors on the injectors and I have seen quite a few posts showing them cable tied. It put me off disturbing them for now but maybe the Sniper 2 had improved connectors.
 

themoparman73 said:
Well I finally got the sniper going but I still not getting enough fuel pressure. I have adjusted the regalator on top and only goes up to 40. It runs for about 5 minutes or so then drops pressure and shuts off.
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What is the specification?? As far as noise goes, every TBI type of injection I've worked on,......and that's a lot, is noisey as hell 'til You put the intake system on(read;... not an open element filter) & close the insulated hood over it. Even then You can hear them standing beside the vehicle.
 
themoparman73 said:
Well I finally got the sniper going but I still not getting enough fuel pressure. I have adjusted the regalator on top and only goes up to 40. It runs for about 5 minutes or so then drops pressure and shuts off.
Click to expand...
You need to hook a voltmeter to the power-in & monitor that as it occurs, & verify it is receiving good current(maintains stable batt.+V).
 
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