I bought the Sniper efi a couple of years ago. Only had problems since. But I’m a total noob when it comes to efi. Ill maybe go back to carb instead. Much less things that can go wrong

 

I'm not certain there's less to go wrong with a carburated system. Sometimes it does come down to the devil you know.
I work with Delphi fuel injected vehicles everyday, 6 days a week. All of these aftermarket EFI systems are based on Delphi EFI. So they make perfect sense to me. But like my steering geometry thread. If you don't understand it at all in the first place. You eather learn. Or throw in the towel.
At the end of the day. EFI does have so much to offer. Hard to fault when it works. When it doesn't, like anything else. If you understand HOW it works. Makes all the difference in trouble shooting and repairing.

 

totally agree

 

sometimes its the intake and not the EFI, sometimes its RF interference

 

true enough. And that really does come down to the installation. If you understand the system, you wouldn't run wiring close to plug wires. Or set it up on a very low rise offset intake manifold like many Chevy's have stock.

 

I ran mine on an old TM-1 taratula single place with and inch and a half of spacers to get a good plenum volume. Its a beast through out the range. I thought I was bogging at high RPM but I was hitting the rev limiter so I increased it ffrom 6800 to 7200. I hit it again so I may bump it up to 7500 where the power starts to come down and add a shift light to the digital dash

 

I also am kind of inclining towards for the Atomic, but what I gather from the Internet seems to show that the Atomic is an older design and for some reason the Sniper is much more popular. Like if Holley is trying to phase it out in favor of the Sniper... I feel that the Atomic installation would be easier and have seen great reviews about it. In your opinion, if you believe the Atomic is better, what would its benefits vs the Sniper be. I know both are property of Holley now.... Thanks

 

I don’t have any experience with the Sniper, I have the Atomic on mine. Yes, it’s better than a carb. I went with it because it’s smog legal in CA.

I like that the Sniper system has the injectors under the throttle body rather than on top - I can only imagine atomization is much better as the injectors aren’t showering the throttle blades with fuel. In fact, I wouldn’t be surprised if a carburetor would get better atomization at idle than the Atomic system.

I do a run through of the menus in the Atomic EFI programmer in this video, but at the tail end of it (cue to 1m55) you can see the injectors bathing the back of the throttle bodies:



Since I took that video, I’ve changed intakes twice and gone to computer controlled timing, which does stabilize the numbers quite a bit and help with changing throttle scenarios (like sudden throttle closure), helps anti-stall and responding to fans / AC kicking on.

If I was doing this all again and had no constraints on the build, between these two I’d consider the Sniper before the Atomic. There’s just a lot more control in the system and the aforementioned injector placement. I’d much rather have port fuel injection, though, and I’d prefer something like Edelbrock’s Pro-Flo before any TBI unit. Not to mention, the center mount throttle bodies on the port injection setups are quite a bit shorter than Holleys, Q-Jets, Sniper and Atomic TBIs - which is a lovely thing on our cars as we all know.