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Old 05-03-2012, 08:41:47 AM   #1
CDesperado
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Thumbs up EFI Comparison (MSD Atomic vs Holley Avenger vs FAST EZ vs Powerjection III)

As I noted in an earlier thread, I agonized for months over which EFI system to choose for my 1978 Camaro.

Since I am not an expert on EFI, I started collecting information on four different systems then combined it into a matrix so I could make sense of all this. (This information came mostly from Summit Racing and the vendor websites.) I will say up front that I cannot debate the finer points of any of these systems... this is information that was readily available, just not in a comparison format that a layperson could understand.

With all that said, here is a head-to-head comparison of four different systems.
(Aka, MSD Atomic vs Holley Avenger vs FAST EZ vs Powerjection III).
MegaSquirt added in May 2012. This product line is a different class of system due to installation and a high learning curve, but we wanted to display the comparison for those interested in it.)


v4.1. Published 15 May 2012.

I look forward to seeing where this goes, but as of now, I plan to buy the MSD Atomic.

Notes:
  1. I should mention that the MSD 2900 includes a Fuel Pump, but is an additional $300 and I wanted to keep the prices as roughly equal as I could.
  2. The Holley HP EFI and Holley Dominator were intentionally excluded from this review as these products exceeded the parameters for the typical deployment scenario and end user that were established as the basis for this review. (ie, cars running at <400 HP.) I may add these products later, time permitting.
  3. MegaSquirt can be configured to control nitrous and can use most stock EFI sensors. It is compatible with electronic transmissions.
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Last edited by CDesperado : 05-15-2012 at 07:21:17 AM.
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Old 05-03-2012, 08:51:57 AM   #2
earnhardtgm3
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I'm going with the MSD Atomic myself with the PWM fuel pump
Fuel Pump
Using a returnless system makes this step easier for the Atomic than any other
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1979 Z 2/8 T-Top----- 388 CI

Lunati Voodoo Retro Hyd Roller Cam
AFR 65cc aluminum heads-180cc competition model
Holley 300-36 intake
MSD 6AL Ignition
Holley 770 street avenger carb
Ceramic headers Pypes X pipe exhaust
350 Turbo w/2700 stall converter(Jegs)
3:42 w/auburn posi

My Z/28 Progress:
http://www.nastyz28.com/forum/showthread.php?t=129623
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Old 05-03-2012, 08:53:12 AM   #3
73Camaro383
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Just from looking at that I'd go with the MSD set-up
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Old 05-03-2012, 08:57:25 AM   #4
CDesperado
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VTM... exactly. I have spent countless hours sifting through forums, seeing people debate this or that. I saw a LOT of posts where people stated things that were just flat out wrong based on the information from the vendor.

It all got too confusing for me to keep track of - I need something I can install then basically just forget about. I have no desire to "tune" my EFI system every time the weather changes (and you know what that is like here in Texas). LOL

Earnhardt..... can you provide a model number for that fuel pump? And can you help me understand the "advantage" of not using a return fuel line? I saw loads of people who were happy that they werent going to use a return line, but no one ever explained why not using a return line is better THAN using a return line. (In my analytical head, having a return line seems like the better option... since it is there if you need it, and if you dont, no worries.)
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Old 05-03-2012, 09:04:56 AM   #5
earnhardtgm3
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Quote:
Originally Posted by CDesperado
VTM... exactly. I have spent countless hours sifting through forums, seeing people debate this or that. I saw a LOT of posts where people stated things that were just flat out wrong based on the information from the vendor.

It all got too confusing for me to keep track of - I need something I can install then basically just forget about. I have no desire to "tune" my EFI system every time the weather changes (and you know what that is like here in Texas). LOL

Earnhardt..... can you provide a model number for that fuel pump? And can you help me understand the "advantage" of not using a return fuel line? I saw loads of people who were happy that they werent going to use a return line, but no one ever explained why not using a return line is better THAN using a return line. (In my analytical head, having a return line seems like the better option... since it is there if you need it, and if you dont, no worries.)


Sure--been doing alot of research myself.

The pump comes in a kit from MSD:$2290.00
Atomic EFI Master Kit-PN 2900
This is the complete kit for anyone planning to convert from a carburetor to Atomic EFI. You get the Throttle Body, Power Module (with Wide Band O2 sensor), Handheld Controller, and the Standard Fuel Kit for up to 525hp (at the crank).You will not need to run a return fuel line to tank like all the others.
Instructions here:
http://www.atomicefi.com/Atomic_EFI_Kits.aspx

A nice installation video explaining it all.
http://www.atomicefi.com/AtomicInstallationVideo.aspx


Hope this helps you out........
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1979 Z 2/8 T-Top----- 388 CI

Lunati Voodoo Retro Hyd Roller Cam
AFR 65cc aluminum heads-180cc competition model
Holley 300-36 intake
MSD 6AL Ignition
Holley 770 street avenger carb
Ceramic headers Pypes X pipe exhaust
350 Turbo w/2700 stall converter(Jegs)
3:42 w/auburn posi

My Z/28 Progress:
http://www.nastyz28.com/forum/showthread.php?t=129623
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Old 05-03-2012, 09:10:29 AM   #6
CDesperado
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And why is not having a return line such a good thing? I just cant wrap my brain around this. (Return lines are optional with the MSD Atomic... I was planning to actually use a return line.)
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Old 05-03-2012, 09:11:35 AM   #7
earnhardtgm3
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You don't have to drop the tank and drill/weld a fitting in tank for the return fuel line
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1979 Z 2/8 T-Top----- 388 CI

Lunati Voodoo Retro Hyd Roller Cam
AFR 65cc aluminum heads-180cc competition model
Holley 300-36 intake
MSD 6AL Ignition
Holley 770 street avenger carb
Ceramic headers Pypes X pipe exhaust
350 Turbo w/2700 stall converter(Jegs)
3:42 w/auburn posi

My Z/28 Progress:
http://www.nastyz28.com/forum/showthread.php?t=129623
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Old 05-03-2012, 09:16:00 AM   #8
CDesperado
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Oh. So that really isnt an issue for me then. My fuel tank is in a box in the garage and I believe it already has two ports for a return line. (I am 99% certain my original tank had a return line, but I dont remember.)
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Old 05-03-2012, 11:23:25 AM   #9
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just curious, what functions would the system need to have in order to run nitrous?
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Old 05-03-2012, 11:58:53 AM   #10
CDesperado
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You should probably post that in the Giggle Gas thread... or call Summit directly as they will very likely know. And if they dont know, they will find out and call you back.

I am absolutely amazed at their Customer Service.
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Old 05-03-2012, 01:35:17 PM   #11
Jones20992
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Have you considered mega-squirt?
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Old 05-03-2012, 01:41:50 PM   #12
ErikNORCAL
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Quote:
Originally Posted by CDesperado
You should probably post that in the Giggle Gas thread... or call Summit directly as they will very likely know. And if they dont know, they will find out and call you back.

I am absolutely amazed at their Customer Service.


sorry man, just trying to help for those that may be looking to make a decision on the samething. Was thinking that great chart could use a nitrous and a/c row. With a/c and efi, believe some of they have a fast idle circuit when a/c is on. I've read the fast system has the a/c circuit but isn't recommended for nitrous.
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Old 05-03-2012, 02:10:03 PM   #13
CDesperado
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Jones... I've heard of it, but am not familiar enough with it to add to our comparison. If you can find out and send me the info, I will gladly add the columns and content. (I dont think it is in the same class as these other systems, based on price and some limited info I have on it.)

Erik... Thats a good idea actually. If you can get the info about it (like Nitrous compatible or whatever), I will be happy to add some rows. I hadnt even considered that being a decision point, but I can see how it would be.
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Last edited by CDesperado : 05-03-2012 at 02:12:27 PM.
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Old 05-03-2012, 02:16:08 PM   #14
CDesperado
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Regarding MegaSquirt... I just found this:

"In general, the MegaSquirt® family of EFI Controllers by Bowling and Grippo is not designed to be a 'no hassle' solution to user's EFI needs. Instead it is intended to be an educational process. As a result, a large amount of reading and study is required. If you are new to the MegaSquirt® community, you may find there is a lot of new information to digest, and much of it will seem confusing, or even contradictory. Your best bet is to read and re-read the FAQ and the manual thoroughly. "

Those red passages (emphasis mine) would have eliminated MegaSquirt as an option for me.

My baseline criteria are ease of installation and maintenance. If it didnt meet that criteria (or was designed more for racetrack/strip/600 HP monsters), I just didnt dig any further with it. My car is a weekend cruiser that will occasionally see me "getting on it" when the Lady isn't looking.

My build configuration is
* 350 Engine
* 325-350 HP
* LT4 Hot Cam
* 700R4 Transmission
* 3.73 Gears
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1978 Camaro Restoration.

There is always a better way. Find it. (Thomas Edison)

Last edited by CDesperado : 05-03-2012 at 02:19:14 PM.
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Old 05-03-2012, 02:43:58 PM   #15
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I know I'm still fairly new here, but... 1 vote for STICKY!
Once again Desperado, a great side-by-side comparison write up.

Edit: Hey I just noticed this months embarks my 1 year mark here!
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