With the OBD connected all the time? I’ve tried to wire this up today through the grommet but I don’t know if it’s UK specific but it’s blocked the other side. Is the OBD connection that needed?
Emira JB4 Tuning Now Available for I4 & V6 Cars!
- Thread starter GRP
- Start date
OBD2 not needed
Like at all for anything or ‘it’s recommended’ I did a OBD data log but ‘should’ it be plugged in 24/7 when using map 2?
Terry answered this question before:
Emira JB4 Tuning Now Available for I4 & V6 Cars!
EU/RHD Emira owners who ordered a JB4. OBD2 harness extensions are now available! Thank you for your patience! https://www.darkworks-design.com/products/bms-obdii-harness-extension-1-meter
www.emiraforum.com
Thank you so much. I’ve honestly been searching all day and googling. I can sleep well tonight.Terry answered this question before:
Emira JB4 Tuning Now Available for I4 & V6 Cars!
EU/RHD Emira owners who ordered a JB4. OBD2 harness extensions are now available! Thank you for your patience! https://www.darkworks-design.com/products/bms-obdii-harness-extension-1-meter
They came back to me and told me this:
“We suggest leaving the OBD2 installed full time.
Without the OBD2 cable installed the JB4 won't receive full data. Certain gauges and logging parameters won't work & you can expect "stage1" like gains regardless of map or fuel.”
Well that's nice of them to finally clarify that. I always felt like Map2 wasn't much of a gain over Map1....hmm.
I’m not gonna lie, there’s a lot of misinformation on this forum and even GRP stating the OBD is redundant beyond logging. Looks like I need to mess about with this long ass cable now.
I can only speak to my experience here which is that Map2 is a massive, very noticeable gain vs. Map1. If you aren't experiencing that, I'd suggest there may be a fuel problem or that the OBD2 connection DOES in fact matter. I never ran it w/o decent 93 fuel and the OBD2 connected. It was a bit of a pain to run the wire for sure, but I didn't feel great about running the piggyback long term w/o the OBD2 feedback loop for on-the-fly adjustments/safety.
I havent switched to map2 yet..
Beginning to wonder what I've purchased here as even Burger is telling me:
"The OBDII connection is required to achieve results beyond map 1's advertised gains."
then
"It will still add power on map 2, but generally beyond map 1 the OBDII connection is recommended".
Why can't the manufacturer just be specific. Even their guide says you don't need the OBD connection to achieve stated gains.
I agree with you that the wording could be improved to help set expectations properly. I interpret all the above to mean:
Stated power gains are achievable without the OBD2 connector (even on Map2) but your results may vary. I assume that the JB4 probably errs on the side of caution for Map2 without the OBD2 feedback loop and thus your gains may be more limited depending on ambient conditions/circumstances.
I spent a few days in the "man I don't want to mess with this cable" state of mind until I just bit the bullet and went and did it. It really is worth the effort for the max power gain and, more importantly, to know that the JB4 is able to perform in a safe manner and is not operating blindly.
Orchardbike
Emira Fiend
"The OBDII connection is required to achieve results beyond map 1's advertised gains."
"It will still add power on map 2, but generally beyond map 1 the OBDII connection is recommended".
Neither of these things were stated by Burger at the start and there have been many posts with comments from Burger that directly contradict these statements.
"It will still add power on map 2, but generally beyond map 1 the OBDII connection is recommended".
Neither of these things were stated by Burger at the start and there have been many posts with comments from Burger that directly contradict these statements.
I agree and their guide states that the OBD2 isn't required beyond data logging and tuning of maps. I've sent an email asking for exact clarity as this is far too ambiguous for my liking. GRP also stated it's only for logging.
I linked a post above from Terry explaining this. Terry is the man making the JB4.
It's pretty simple: without the OBDII cable attached, the JB4 has less information at runtime to work with than with the OBDII cable attached. It can function fine without it, but having additional data means it can make better decisions in real time about what adjustments to make for smoother running and better performance given the conditions at that moment in the car it is attached to. The JB4 likely operates, as it should for the safety of your engine, slightly more conservatively without access to the additional data. Or to look at it the other way around, it can operate more aggressively if it has more data to base decisions on.
The cable is a pain to route, but it is a one-time thing that shouldn't take more than an hour or so to do. If you aren't mechanically inclined or don't want to spend the time on it, then just don't and run without it.
If you are hung up on wanting to ensure you get the exact gains that Burger achieved in their tests, then you are looking at it wrong. Car tuning and horsepower gains are very fuzzy things. The test results of any tuning are so dependent on the exact car, including any mods already on the car, in the exact conditions it was tested in, using the same fuel it was tested with, etc. Connect the cable or don't. You will see some gains either way. Enjoy what you get and have fun with your car.
It's pretty simple: without the OBDII cable attached, the JB4 has less information at runtime to work with than with the OBDII cable attached. It can function fine without it, but having additional data means it can make better decisions in real time about what adjustments to make for smoother running and better performance given the conditions at that moment in the car it is attached to. The JB4 likely operates, as it should for the safety of your engine, slightly more conservatively without access to the additional data. Or to look at it the other way around, it can operate more aggressively if it has more data to base decisions on.
The cable is a pain to route, but it is a one-time thing that shouldn't take more than an hour or so to do. If you aren't mechanically inclined or don't want to spend the time on it, then just don't and run without it.
If you are hung up on wanting to ensure you get the exact gains that Burger achieved in their tests, then you are looking at it wrong. Car tuning and horsepower gains are very fuzzy things. The test results of any tuning are so dependent on the exact car, including any mods already on the car, in the exact conditions it was tested in, using the same fuel it was tested with, etc. Connect the cable or don't. You will see some gains either way. Enjoy what you get and have fun with your car.
Thansk for the write up.. I wish it was simple but the supplier is giving mixed messaging. Maybe that's my English vs US English ;-).
Nonetheless... all I want is to run map2 and feel more than map1. If I can do that safely without the OBD connection then sweet. If I must run the OBD then Ok I'll do it.
Orchardbike
Emira Fiend
I accept your comments but that’s not what the two sentences state
My personal recommendation is just do it. It should only take a couple hours or so unless you are really trying to get fancy with the routing.
You won't regret it and once it's done you'll be able to enjoy the smooth power as much as you want and not have to worry about it!
Question if I may, so I found the rubber grommit on the side, made the slit but i couldnt get anything through it.. it was obstructed (EU spec car maybe).
So going through the firewall, do you have a quick guide or recommendation as to how to remove the 'upper shelf' that sits ontop of the back carpet?
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