CMD or PowerX - Page 3 - Hyundai Genesis Forum
Technical Tuning of EMS/EFI This section is reserved for discussion about the electronic tuning specifics for the Genesis vehicles.

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post #21 of 31 Old 03-22-2010, 08:36 PM Thread Starter
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WIN! this topic is yielding some good info!

I am leaning towards the powerX module through BR, I think you are right crookedH, the AT should hold up just fine as a DD.

And macrez I am pretty sure BR claims they have their own custom tune on their instead of the base power axel one, but I messaged BR so I will post up what they say
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post #22 of 31 Old 03-22-2010, 08:56 PM
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Awesome info thanks GC!
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post #23 of 31 Old 03-22-2010, 09:35 PM
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Originally Posted by macrez21 View Post
Ok, does anyone notice a different with their MPG? Just wondering because i would figure if the poweraxle is adjusting all this there would be a noticeable difference. the miles per gallon don't sway my decision what so ever but i am just interested to see what others are running like. Thanks for the help though guys, i guess i'll be running with poweraxle.

PS. If beyond redline gets rid of rev hang, does it do anything else? or is Poweraxle just the best module for this vehicle?
Beyond Redline sells the PowerAxel modules with their own custome tunes. The features are the same between the Beyond Redline versions or the versions you can buy on eBay, as long as it's a PowerAxel or PowerX module.


Cruising, or open loop MPG should stay essentially the same with either CMD or PowerAxel. The vast majority of the time when discussing tunes on cars, you're discussing "Open Loop" or WOT or Mashed Gas driving. When you're cruising around town the ECU will do it's best to maintain a 14.7 a/f ratio running in "Closed Loop". Beyond Redline mentioned the ECU always going back to a 14.7 no matter what they programmed for closed loop, meaning no increase or decrease in mpg when cruising or light driving.

Open loop is where all the tuning changes are made since this is the only time your car is sure to be running the same parameters as it disregards sensor information for the most part and runs off parameters set by Hyundai. To increase boost, you also have to increase fuel past a certain point. Increase fuel and decrease MPG. The one thing about the tunes though is with the extra power you won't have to wring out the car as much so you may notice a slight increase in MPG if you don't mash the gas all day long.

If you only get on the gas a few times a day then none of the tunes will affect your MPG, regardless of what others swear by. There may be a placebo affect or other factors, like intake, exhaust, etc that can affect your cruising or closed loop driving, but not a tune that only affects open loop driving. Otherwise It's just not physically possible.
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post #24 of 31 Old 03-23-2010, 06:12 AM Thread Starter
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Originally Posted by CrookedH View Post
Beyond Redline sells the PowerAxel modules with their own custome tunes. The features are the same between the Beyond Redline versions or the versions you can buy on eBay, as long as it's a PowerAxel or PowerX module.


Cruising, or open loop MPG should stay essentially the same with either CMD or PowerAxel. The vast majority of the time when discussing tunes on cars, you're discussing "Open Loop" or WOT or Mashed Gas driving. When you're cruising around town the ECU will do it's best to maintain a 14.7 a/f ratio running in "Closed Loop". Beyond Redline mentioned the ECU always going back to a 14.7 no matter what they programmed for closed loop, meaning no increase or decrease in mpg when cruising or light driving.

Open loop is where all the tuning changes are made since this is the only time your car is sure to be running the same parameters as it disregards sensor information for the most part and runs off parameters set by Hyundai. To increase boost, you also have to increase fuel past a certain point. Increase fuel and decrease MPG. The one thing about the tunes though is with the extra power you won't have to wring out the car as much so you may notice a slight increase in MPG if you don't mash the gas all day long.

If you only get on the gas a few times a day then none of the tunes will affect your MPG, regardless of what others swear by. There may be a placebo affect or other factors, like intake, exhaust, etc that can affect your cruising or closed loop driving, but not a tune that only affects open loop driving. Otherwise It's just not physically possible.
BR said as of right now the unit cannot be unmarried from the car.
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post #25 of 31 Old 03-23-2010, 07:19 AM
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Originally Posted by GCkid View Post
BR said as of right now the unit cannot be unmarried from the car.
I know Arvin can do it, he did it for Jared on GenCoupe when he decided to sell it and go with CMD. Might want to check with PowerAxel directly. Perhaps they changed the policy or just did Jared's as a one time thing...
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post #26 of 31 Old 03-23-2010, 10:19 AM
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Originally Posted by Tufast View Post
I feel that the CMD is intuitive enough that a beginner can even learn, but I'm wanting near perfection on my tune in order to get the most I can out of it, thus will let others in the know handle that aspect of my build.
No tuner will take more time and tweak it as much as the owner can.

Dynojet Research
Automotive Performance Parts Division
sales@dynojetcmd.com
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post #27 of 31 Old 04-15-2010, 01:30 PM
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ok so correct me where im wrong:
The CMD intercepts the ECU signals before they get to the solenoids and alters them and the module stays under the hood while driving.

The PA unit is an ECU reflash right? And i read that it works through the OBD II port so does the PA module stay inside the car as well or once the reflash is done you pull out the module because all of the information is stored on the ECU.
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post #28 of 31 Old 04-15-2010, 03:30 PM
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Correct about CMD

With PA you send the new map to the ecu through the OBDII port and then remove the PowerX module. Nothing has to stay on the car with PA.
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post #29 of 31 Old 04-17-2010, 04:52 PM
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awesome thanks for the clarification
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post #30 of 31 Old 04-26-2010, 03:46 AM
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i don't even know what i'm asking cos i know nothing about computer,
but can you use both PA AND CMD at the same time to take advantages of what the other one lacks?
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