atomic efi vs holley sniper

Let’s face it, I had no previous experience before this. *We might be biased but really, look at them! We will safeguard your e-mail and only send content you request. ECU and Sensors-The ECU is integrated to the throttle body! I can pull into traffic without praying the engine won’t stumble or lurch. Instead of a choke the control system has to richen the mixture some other way. The “at cruise” air/fuel setting I settled on is 16.5. I can’t say whether or not I made any major improvements in that area, but I didn’t hurt it either. As I stated in the original article, I really have no background in EFI tuning – and even less knowledge of computer programming, so, upgrading to EFI had to be idiot proof. ie ease of instillation, tech support, noise, programing, operating problems, and any other plus or minus. This is one area that too much really is a bad thing. From hardware failures to install issues. In the original article, I mentioned I was not an EFI expert, but after some simple research – and with the help of the Holley tech line – I was able to inflict some simple adjustments to make the Sniper even better for my application. Injectors-Fuel delivery is provided by four precision 80-pound injectors. How does 14.0 to 14.5 on the highway sound?,,, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Smoother idle, control timing, ease of making changes. To avoid that scenario, I slowly increased the lean-ness of the incoming charge until the engine just started to react negatively, and then backed off. You can get the ones for the Sniper here: I havent done it yet but i have been looking. "...........If you want all the possible advantages of a modern EFI system the easiest way is to buy a new car where someone else has already sorted out all those details. Holley didn’t cut corners when it comes to upgrading the look of the Sniper 550511 over other Holley EFI systems, and that’s why it has a tougher look to it. It doesn’t pop or sneeze if I drive it cold. Next came air/fuel ratio adjustments. I really don't have a dog in this fight, but I have to point out one glaring error in the above post.

I am converting my carb to EFI. Chevy Hardcore NEWSLETTER - SIGN UP FREE! The install was completed on January 20, 2018, and it is now April 3, 2018.

For example, I increased the lean-ness of the idle until I noticed the engine didn’t want to run very well after the initial start-up, and coolant temperatures started climbing irregularly.

Also in Tools, Shop Equipment & Chemicals -. Holley® has been the undisputed leader in fuel systems for over 100 years. For a better experience, please enable JavaScript in your browser before proceeding. Usually, deadlines don’t afford me the opportunity to go back and revisit an install I had done months prior.

Holley® has been the undisputed leader in fuel systems for over 100 years. Could it really work that well? The weeks following the install saw me slowly increase the air/fuel ratio numbers to lean the system.

Not a simple install. my response was directed at the comment(s) made which were more or less were discounting any advantage that the Weber / IR induction had over the 4 barrel carb / plenum manifold. There's plenty of room in the world, and in the classic car hobby, for every type of car imaginable.

As a single solution, or partnered with products from other Holley companies we can give you the edge you need over the competition! We installed and ran all three units on a ’66 Biscayne wagon that has a very basic small-block Chevy in it. I'm looking to just convert to EFI, and have all advantages of it. Good question. These are the fuel injection kits we see most often discussed and debated … The throttle bores are 1.75” diameter and each blade is supported with precision roller bearings for smooth pedal operation. The even bigger reward was the excellent drivability that it provides. The TPS, MAP, IAT and fuel pressure sensors are all incorporated into the ECU saving you wiring and connections.

I think I’m done “tuning” the Sniper system, and the truck still runs as good as ever.

Yes, it varies a small amount, but my pressure on the load pedal and the amount of fuel I put into the tank at each fill up can vary a small amount as well.

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The positive benefit of being able to tune each cylinder individually cannot be overstated. I never claimed that the Webers were superior to, or cheaper than, modern direct port injection. Holley products for GM's popular LS engine are dominating the LS scene as well. I started by adjusting the fuel prime – which squirts a small amount of fuel into the intake to aid in start-up. It looks like the Sniper with a Holley dual sync distributor may be the best way to go. No dog in this hunt either but that's kinda what efi systems do too huh? A forum community dedicated to Ford Mustang owners and enthusiasts. There is absolutely no 4 barrel carb that can give you the horsepower, and more importantly, the torque curve that a set of well sorted Webers can on ANY V-8. Not only did the truck drink less fuel, it gained some drivability.

And if I can keep my foot out of it, it returns a consistent 15 to 20 percent improvement in fuel economy which was at a pretty respectable level beforehand. I started out at 13.1.

This unique design reduces wiring and keeps your EFI installation easier than ever. It runs beautifully at the beach or on the Eisenhower Pass (11,150 feet) whether near freezing or on a 100-plus-degree day.

105 Posts .

Thank you for your time.

Anyone that tells you that from their own experiences just plain gave up on the Webers because they couldn't figure them out. I used the Holley Sniper Master kit PN 550-511k. But has it gotten any better. These injectors feature a stainless steel ball and seat metering method for maximum internal sealing. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!

I'm not in the business of talking someone out of getting what they want. But this time, I made an exception. Drivetrain Mounts, Engine Plates & Spacers, Direct Fit Remote Mount Twin Turbo Systems, Distribution Blocks, Filters, Adapters and Fittings, Microswitch and Solenoid Mounting Brackets, Less wiring and fewer connections for the easiest installation, Integrated sensors reduce the number of connections, Mounts in place of standard square bore carburetors, Self-learning technology keeps the engine performing smooth through any condition, Supplied with wide-band 02 and coolant temp sensors for easy installation, Controls the activation of two cooling fans, Supports nitrous and boosted applications. Thats all.

First time you go WOT you'll go way lean as the injectors can't flow enough fuel.

Before I installed the Holley Sniper EFI on my C10, I was skeptical about the benefits I heard I would get. Atomic EFI systems were designed to simplify the installation and improve overall performance. Holley carburetors have powered every NASCAR® Cup team and nearly every NHRA® Pro–Stock champion for four decades.

I think the answer would be: it depends.

MSD claims that their "Atomic" system is good for up to 625 hp...but I guess it would still be fine for my engine setup (496

If working correctly you may perceive that as being easier or better but its really more complicated and if it doesn't work properly the fix will also be more complicated.

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