Re: MSD Atomic for dual purpose bracket/street car?
[Re: Streetwize]
#1922703
09/30/15 07:48 PM
09/30/15 07:48 PM
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Joined: Jul 2010
Posts: 1,845 Tampa
DusterDave
top fuel
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top fuel
Joined: Jul 2010
Posts: 1,845
Tampa
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I drove Nat's Jeep a little bit at Jeep Beach, and the throttle response was insane. That's what pushed me to put the Terminator EFI on my Jeep. In retrospect, I should have done the MSD Atomic for the timing control benefit, but since I sold my Jeep, the point is moot. I definitely say, go for it!
Gone to the dark side with an LS3 powered '57 Chevy 210
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Streetwize]
#1923193
10/01/15 11:41 AM
10/01/15 11:41 AM
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Joined: Jan 2015
Posts: 35 Canada
Criterion
member
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member
Joined: Jan 2015
Posts: 35
Canada
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I've been running an Atomic since the beginning of this summer and have had nothing but great results. They are by far the least obtrusive of all the aftermarket kits when installed because their ECU and fuel pressure sensor, unlike FAST's, are built into the throttle body. The only external "box" you have to mount is the power control unit, and that has the footprint of a large mobile phone. The harnesses were all of very nice quality and seemed to be loomed a lot tidier than the FAST and Holley offerings. One last feature I liked was that the TB has a built-in throttle return spring, which is a nice touch in-terms of removing clutter and making it into an integrated package.
Drawbacks or dislikes aren't numerous, but I do have them. First, you can NOT use the PWM feature with any fuel pump other than MSD's because they use a proprietary frequency. Two, if your motor has a very poor vacuum signal, count on using a single plane intake only. The system will tolerate down to 9" HG of vacuum, but MSD recommend single planes in low-vacuum situations. Third, the horsepower limit of the system is definitely there with only 4 80PPH injectors. The more expensive FAST EZ EFI 2.0 runs 8 60PPH injectors, so that's the only game in town if you're going over 640 horse N/A with a kit like this.
The driving characteristics of the kit have been superb. I'm running my Atomic on a 512 that pulls 12" of vacuum and I don't have any issues. The car started on the first try and has only ever stalled twice. Both of those stalls, however, were during the initial learning phase of the ECU and have never happened since. Throttle response is ultra-crisp, cold or hot it starts almost immediately, and I've gotten a decent gain in fuel economy. You can set your own A/F targets for idle, cruise, WOT and fuel enrichment on throttle tip-in (like an accelerator pump). I honestly haven't had a single problem with it in-use. It is expensive relative to what you get, but I suppose that's the price you pay for a succinct fuel injection package wearing a brand name. All I know is that I don't regret buying it, and I don't miss the carburetor at all.
Let me know if you have an further questions and I'll answer them as best as I can.
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Monte_Smith]
#1923461
10/01/15 04:41 PM
10/01/15 04:41 PM
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Joined: Jan 2003
Posts: 9,924 Weddington, N.C.
Streetwize
OP
master
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OP
master
Joined: Jan 2003
Posts: 9,924
Weddington, N.C.
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I figure this motor will make a solid "for real" 575HP/570 tq so it's a bit bigger than the base PWM pump 525 kit. Nat's motor makes 545 and he opted for the Aeromotive in tank pump kit and it works great.
Then again, when we did the back to back, another way to look at it is my Old Holley with MY base Jetting and it was right there with the EFI, we never even opened the bowls to try to optimize the carb...it was leaning out up on the top, the Holley probably might have made ~10-15 more
I want to do it more since I just want to have something new to learn and tweak, I like the idea of the Holley...but now that Holley has bought MSD it might be interesting to see what the next gen product might do.
Last edited by Streetwize; 10/01/15 04:43 PM.
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Monte_Smith]
#1923481
10/01/15 05:14 PM
10/01/15 05:14 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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My biggest complaint with the Atomic and EZ, in anything other than a stock replacement capacity..........is you can't change ANYTHING. You are totally reliant on the tune and calibration the box chooses to run. On the Holley Terminator, it uses the same HP ECU as other kits. Meaning if you WANT to, you can plug the laptop into the ECU and makes changes as you desire I dont have many miles on my Holley unit but so far I've been happy with it... if I wanted more power I put in bigger injectors to support the power.. the box takes care of it... I dont have the timing hooked up on it yet but I will come spring time... that way it will control both the fuel and timing
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Streetwize]
#1924047
10/02/15 11:54 AM
10/02/15 11:54 AM
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Joined: Jan 2003
Posts: 8,079 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,079
Tulsa OK
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I am surprised the Accell EFI is even market relevant anymore.
68 Barracuda Formula S 340
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Criterion]
#1924049
10/02/15 12:02 PM
10/02/15 12:02 PM
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Joined: Aug 2006
Posts: 99 South Dakota
wireweld
member
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member
Joined: Aug 2006
Posts: 99
South Dakota
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Besides cost, what are the pros to the FITech package? And what do you feel the cons are? Built in pressure regulator, injects above the blades, controls timing, change your tune on the go with handheld or plug in PC and program that way. I will think of more later.
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Streetwize]
#1924227
10/02/15 03:39 PM
10/02/15 03:39 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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All EFI systems are the same........meaning that within the capabilities of the software and firmware, it does what you TELL it to do. All these guys that say so and so system does everything so and so system does, for 1/3 of the cost, are simply incorrect. It doesn't work that way. You kinda get what you pay for. Be that the quality of the components, the capability, the availability or most importantly......TECH SUPPORT.
On the throttle body stuff........they inject below the blade or above the blade, everything else doesn't matter. Just depends on which method you want or think works best. The other things, controlling timing, tune changes, etc, are simply based on what the ECU can do with the supplied firmware. Some systems are more limited than others...........as was mentioned with NOT being able to change the tune in the Atomic or the EZ EFI.
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Monte_Smith]
#1924237
10/02/15 03:56 PM
10/02/15 03:56 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I can say that the Holley guy I deal with(Shawn or Sean) really helped me out... they forgot a jumper plug with the kit that I got.. it was for the mopar engines... they sent the part out free of charge... after that they walked me through the set up to verify what I had put in the ECU... now I just leave the down load cable attached and just push it up out of view.. that way I can down load anytime I wish since this unit has a data logger built in EDIT Come spring time I will put on a crank trigger so it will have the timing control... and I think I will put on a couple more things to help... just for my own use
Last edited by MR_P_BODY; 10/02/15 03:59 PM.
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Re: MSD Atomic for dual purpose bracket/street car?
[Re: Streetwize]
#1924275
10/02/15 04:53 PM
10/02/15 04:53 PM
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Joined: Jan 2003
Posts: 9,826 las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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The only possible negative I'm hearing/reading on some boards is that FItech has in the past taken $$$ but can't deliver on time or full shipments....been down that road before, I didn't like it much.
any personal experiences with them wireweld? pre ordered one...two weeks later, I called and was told they were just receiving the shipment....a week later I had my unit...
Tony
70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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