MSD Atomic 2 EFI vs Atomic 1: Upgrades and Improvements Explained!

Learn more: www.holley.com/products/fuel_...
MSD Atomic 2 EFI has been reengineered from the ground up for even more performance. Now featuring an 865cfm throttle body, boost capability, and more, this fuel injection setup helps bring your car into the world of modern EFI.
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[@kentuckywaves]

The burn out at the end is a great way to get me to watch until the end!

[@JoeyGarcia]

Sounds very interesting and definitely more advanced than the original Atomic. But, how does it compare with the Sniper EFI? What would be the criteria to choose one over the other? Would be great if Holley had a video that compares and contrasts all their throttle body EFI offerings and explaining possible reasons to choose one over the other. Or reasons why not to choose one. I'm just glad that Holley keeps innovating.

[@dividingbyzerofpv6748]

The hints are all there dude. 4 wire hook up Hand held color monitor and it's file format And compatible with Holley Sniper advance control distributor. It is a Holley Sniper but with different fuel rail/case format

[@JoeyGarcia]

@@dividingbyzerofpv6748 I also see the Sniper has the fuel coming from below the plates. This looks like it's coming from above the plates? What are the advantages/disadvantages of either? Those are the things I'd like to know.

[@nosnerd1967]

Sweet !

[@moonburnt_garage]

Mine is on the way for a blow through Pontiac 350 with 2004r.... excited!

[@davidlewis2681]

I've been using Atomic 1 for 3 yrs on my 5.9 cammed magnum...in a 87 Power Ram..8' ft bed 4x4 and she rips ass!! Literally smokes my 35's with no effort...I use a 3 inch spacer under the throttle body..on top of an airgap alum.intake..No need for me to upgrade ... but Atomic 2 seems really cool!!!

[@wreckanchor]

You are lucky my friend has the MSD 1 and he has nothing but trouble with it. He is real close to putting a carb back on the engine. It has left him on the side of the road a few times.

[@armygreenfj3924]

In my opinion the 1st generation atomic is better. Only because you can mount the electrical module inside the vehicle and keep it away from heat.

[@428cobrastang]

I tried the original on my Mustang several times, with MSD support on the phone multiple times. Got it running and away from home several times but it would never hot start. Carried my old carb with me so i could get home. Waste of over $2,200. It sits on a shelf to remind me not to buy another MSD throttle body.

[@richardross119]

Is this too large for a 2.8 mid range cam chevy V6?

[@luisalfredoherrererodrigue4906]

Regards, I'm looking and I've been trying for a while to decide which efi would suit me better. I would like if you could help me choose the best option, I would greatly appreciate it... I have a Chevi Monte Carlo, all original, it even has A/C, I use it on weekends. week for the races a 1/4 mile it has a ls 6.0l or 366cl engine 750holly carburetor with an msd 6010 box I have wet nitro installed that generates 430hp to the motor wheels and with nitrous 666hp to the wheels...I don't want to know nda carburetor, that's why I want an efi but I see that the msd atomic 2 is going to be short for me when using it with nitrous and it's going to be high in the mixture when using it without nitro I like the atomic since the first one came out for 550hp which of the two I would do well with my ls 6.0l engine and if the atomic 2 can handle the time of my box cd msd 6010 ..... I await your prompt response thank you very much

[@Мистер_ЗМЗ]

Круто!

[@aw9680]

They didn't mention the change from PWM fuel pump pressure control with the atomic 1, to constant pressure and the need for an external regulator with the atomic 2.

[@blueduster74]

The separate ECU is the better method actually. The ECU on the throttle body are prone to RFI and heat issues.

[@JUSTMAN2345]

Are these units sealed and waterproof for offroad applications?

[@minibeef8574]

I use the atomic 1 on my rock buggy. Works great no issues.

[@Traxxas119]

Are these marine rated like the snipers?

[@jonprice9368]

Just out of curiosity I have a c10 with a thumper cam. Could this unit run with it?

[@sellis330]

Yes. The msd units have tuning profiles for street, mild, extreme cams. I think the max Lsa is like 240 degrees.

[@jonprice9368]

@@sellis330 I know this cam is ground on a 107 lsa with 283/301 dur. I know in the past the edelbrock pro flo used to say as long as you’re making more then 8” of vacuum it should be fine but hard to say with a tbi type setup.

[@sellis330]

@@jonprice9368 I’m a dummy. I meant to say duration of 240. And going over the first gen, the max duration is 250. I don’t see any manuals yet for the efi 2.

[@norcaltim6806]

SO.YOU CANT USE A 700R4 WITH THE ATOMIC 1?

[@alainaguilar9938]

No, because a 700r4 is not electronically shifted. It has a throttle cable. I got a 92 roadmaster with that trans

[@dividingbyzerofpv6748]

Sooo it's a Holley Sniper with MSD badging

[@mannysolis4588]

Good question, if not then which is better

[@travisbeagle5691]

The Atomic came first and its method of fuel delivery is different than the sniper. The sniper works like any port fuel injector and sprays the fuel into the air, this works more like a carburetor and uses a Venturi to mix fuel. If there's one thing carburetors have over EFI, it's that they get a better fuel mix so having that ability coupled with the control of an EFI should put this over the Sniper.

[@dividingbyzerofpv6748]

@@travisbeagle5691 it is nice to know about the differences in fuel delivery and atomization. The old Atomic is not even worth discussing right now in my view due to how clear it is that the Holley Sniper systems/menus/controller are identical. There is some kind of shared tech/parts here, knowing the relationship between Holley and MSD would be nice.

[@travisbeagle5691]

@@dividingbyzerofpv6748 I figured they were either divisions of the same company or one bought the other. Looks like Holley owns MSD. www.holley.com/blog/post/holley_performance_products_acquires_msd_group/

[@dividingbyzerofpv6748]

@@travisbeagle5691 there are indeed just too many little clues that the two are related. Had I known this MSD kit was coming I likely would have waited for the Atomic 2 for my 66 build. Found a decent Sniper package at Speedway and went with that. Tried looking for info linking MSD and Holley but te search results were the typical garbage amazon/ebay links or reviews from age old forums for either system. Gotta love the fact that the internet and search engines are becoming less user friendly.

[@miketlane]

So you can't use this with any other throttle body or run dual throttle buddies....

[@tgafire87]

This would be in place a carburetor. Which said vehicle wouldn’t have a TB.

[@miketlane]

@@tgafire87 my question is about this operating factory or aftermarket TB. Example. i already have a 460 that already has dual factory throttle bodies on it.....my question is can i run them or do i have to buy new TBs and can it even dual TBs. another example.....if my car has 2 carbs....witch said vehicle dosent have TBs yes......so, "So you can't use this with any other throttle body or run dual throttle buddies....?"

[@tgafire87]

@@miketlane if you already have throttle bodies then you already have fuel injection. So this product would be useless to you. If you wanted your motor to look carbureted. Then buy this and also a whole new intake manifold.

[@miketlane]

@@tgafire87 no, i have a TB.....nothing to run said TB. they are on a 6-71 supercharger so no i dont thik ill buy a new intake. it was originally a dual carb set up and im making the change to TB. only if this cant run 2 TBs then its useless to me.

[@tgafire87]

@@miketlane Sigh……I don’t have any crayons to draw you a picture so I guess your out of luck.

[@Celticman197]

Original was junk. I had 2, first one lasted 500 miles, 2nd one lasted 8000. I have a Holly Sniper. now.

[@user-hc3cn7cu4g]

I finally save n stack parts n now im about to build my rig n u say u got a better one. Dam. Every time a sec to late or a cunt hair to erly