Emira JB4 Tuning Now Available for I4 & V6 Cars!

[Eagle7]

We have verified proof that map 2 works without the OBD connection in place by a couple users,
I think Burger would prefer everyone to have this connection in place to log data and send to them so they have a large sample size from people across the country/world with various fuel types, elevation, temps etc etc to optimize the maps even further.
I know its a pain to run the cable to make that connection but it is sort of for the greater good if you are going to run the higher level map and then you can 100% verify your car is running optimal.

How does it look for filling back orders? I'm now at 15 days and waiting.

 

[Emira Fan]

rather than running crazy long wires just to get the CAN data, just tap into the 2 CAN wires right off the ECU would likely be 10x easier. Just a thought.

Exactly, someone should pull back the loom take a picture of the wire colors and find a good place in the harness to splice in -
Better yet the JB4 guys should weigh in on the best place to splice in - maybe even provide water proof splice connectors in the kit or OEM plug adapters with quick connection ends for bare wires.

 

[Tomwa]

I think you are missing the fact that Lotus doesn't have a published wiring diagram. Not in any of the paid manuals or nothing.

You could spend time a reverse engineer it, but it's not going to be pretty or easy.

 

[Lotus F1]

I can tell you now, most and including myself not too thrilled with the idea of splicing into my ECU harness.

 

[pal9000]

Hey everyone…first time poster but been using this forum for a while for info. I’ve owned my v6 manual emira since 4/2024 and thanks to GRP I’ve made a bunch of upgrades (thanks greg!). Anyway, I reached out to Terry Burger over FB to find out if the OBD connection is really required for MAP 2 and apparently it is not. This is my experience as well since I definitely feel a difference between MAP 1 and 2. I have no intention of using the OBD cable only bc I’ll have to remove it every time it goes to the dealer (which has been a lot recently…for cosmetic things nothing mechanical).

 

[BobbyG]

This is good to know.

I wonder if running the OBD setup for a few months would be beneficial and then disconnect? The routing of the cable would be a temporary scenario (if that’s possible).

I will have the GRP CAI, 3rd Cat delete, Milltek controller and exhaust. So I’m thinking the ECU will need time to optimize the JB4, but then pull the OBDII cable/plug

Maybe my logic is flawed.

 

[seriously]

I know we have conflicting reports but it makes sense that the OBD connection is required only for recording data or pursuing a custom tune for “your” car. Otherwise the JB4 is preprogrammed based off the donor car. Doesn’t seem logical to need the OBD for map2 but not map1. I’m in the don’t need it camp

 

[TFS]

Just asked again today for a clarification. Need or not need.. and today JB4 told me that it is not needed for the map2.

I am wondering if for certain hot/humid countries it could be beneficial to get a custom tune…

Temperatures were soaring today at 47C/117F with a 60% relative humidity and a low ambient pressure. That gives a density altitude of 3800ft above mean sea level.. so performance in degraded compared to a cooler day at sea level.

I wonder how much the ECU corrects for these conditions? And if a custom tune would improve the performance in these cases.

 

[GRP]

How does it look for filling back orders? I'm now at 15 days and waiting.

We have been receiving about 10 kits per week and shipping the same day we receive them.
You are #3 on the list now so yours should be going out later this week or early next as soon as that next batch arrives!

 

[mr.suntorytime]

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

 

[Waterlife]

So I installed the JB4 on my V6. My only upgrade for now is a high flow GRP air filter while I wait to undertake the cat delete and valve controller. I had the car ready to just plug in and go. Map 1 was good and I felt it would still be worth the gain but not heart pounding. Map 2 (93 Oct)on the other hand is how it should have come just like others have said. I did some quick roll runs with a friend with his 21 Vantage. Dead heat until shift points in 2nd and 3rd. He used to jog quickly away from me easily for reference.
I do wish the redline dump was more of a limiter but ironically it wasn’t as big of an issue during my 7-8 runs I did. This was because before the JB4 install it took a bit of time to hit redline and I would loose track. Now I’m looking at the tach because it hits quicker. That’s just me hope that makes sense. No codes or issues and fun value to another level.

 

[Rupes]

Has anyone tested MAP 2 with 91 or 92 octane? Would be nice if it worked without having to dump octane booster in the tank every fill up.

 

[Tomwa]

Has anyone tested MAP 2 with 91 or 92 octane? Would be nice if it worked without having to dump octane booster in the tank every fill up.

I don't think there is any chance Map 2 works on 91. I am doubtful about 92

 

[NoFear99]

Has anyone tested MAP 2 with 91 or 92 octane? Would be nice if it worked without having to dump octane booster in the tank every fill up.

It is worth the assle so much. You just need a thin and long funnel to be able to drop the bottle before to fuel the car at the gas station. Mine claim to raise 4 point so 94-95 octane is going to be even better. I would not consider it safe the run map2 on 91-92. The tune is gonna be too agressive for that fuel. Myself I bought that fuel pump and I do my mix in a 5 gallons at home now.

 

[Terry]

We have verified proof that map 2 works without the OBD connection in place by a couple users,
I think Burger would prefer everyone to have this connection in place to log data and send to them so they have a large sample size from people across the country/world with various fuel types, elevation, temps etc etc to optimize the maps even further.
I know its a pain to run the cable to make that connection but it is sort of for the greater good if you are going to run the higher level map and then you can 100% verify your car is running optimal.

Hey guys, just to clear up some general confusion:

1) Without OBDII the JB4 can only read in the sensors it's attached to. In this case the MAP sensor for boost and the MAF sensor for airmass and inlet temperature. Using only those parameters the JB4 can provide pretty solid tuning and map1, map2, and map3 can be run like this. And this allows you to install or remove the JB4 in minutes!

2) Adding the OBDII cable gives the JB4 a lot of additional data including engine speed, pedal input, throttle, timing advance, fuel trims, AFR, engine temperatures, and more. When available the JB4 takes all this CANbus data and incorporates it into the tuning which produces a smoother and better tuning output. Think of it in terms of resolution, high def vs low def. You can still watch the football game in low def but it's not quite as crisp. Without the OBDII certain elements have to be modeled/estimated instead of being read directly.

We understand the OBDII is a total PITA on the platform and we're still looking for alternative connection points. For most of you I suspect the normal "low def" (no OBDII) tuning is so much better than the factory tuning to start with you won't miss the extra OBDII data. And for the hard core among us then you can route it.

 

[Terry]

I don't think there is any chance Map 2 works on 91. I am doubtful about 92

Map2 can be run on 91 but I would not do it without the OBDII cable attached, and then send in a log so we can review the timing/AFR for you to ensure it's safe. Also keep in mind when octane is below grade even though you can run map2, it might be the case that map1 is actually putting down more power.

 

[sbproducer]

Hey guys, just to clear up some general confusion:

1) Without OBDII the JB4 can only read in the sensors it's attached to. In this case the MAP sensor for boost and the MAF sensor for airmass and inlet temperature. Using only those parameters the JB4 can provide pretty solid tuning and map1, map2, and map3 can be run like this. And this allows you to install or remove the JB4 in minutes!

2) Adding the OBDII cable gives the JB4 a lot of additional data including engine speed, pedal input, throttle, timing advance, fuel trims, AFR, engine temperatures, and more. When available the JB4 takes all this CANbus data and incorporates it into the tuning which produces a smoother and better tuning output. Think of it in terms of resolution, high def vs low def. You can still watch the football game in low def but it's not quite as crisp. Without the OBDII certain elements have to be modeled/estimated instead of being read directly.

We understand the OBDII is a total PITA on the platform and we're still looking for alternative connection points. For most of you I suspect the normal "low def" (no OBDII) tuning is so much better than the factory tuning to start with you won't miss the extra OBDII data. And for the hard core among us then you can route it.

Thanks for the clarification. So, the OBDII connection does improve the car's performance to some degree whether that be measured in potentially faster times or just the overall smoothness in how the engine operates with the inputs it is given potentially increasing longevity or overall health. (Probably not measurable or difficult to measure)

That's my interpretation and it means that I'll be connecting the cable.

 

[sbproducer]

Map2 can be run on 91 but I would not do it without the OBDII cable attached, and then send in a log so we can review the timing/AFR for you to ensure it's safe. Also keep in mind when octane is below grade even though you can run map2, it might be the case that map1 is actually putting down more power.

Is there a 92 Map potentially in the works? I would love to run a 92 map on 93 octane with performance lying somewhere in between the 91 and 93 Map. That would be huge and I'm sure many people would run that map due to potential concerns about the 93 Map.

 

[Lotus F1]

Thanks for the clarification. So, the OBDII connection does improve the car's performance to some degree whether that be measured in potentially faster times or just the overall smoothness in how the engine operates with the inputs it is given potentially increasing longevity or overall health. (Probably not measurable or difficult to measure)

That's my interpretation and it means that I'll be connecting the cable.

Me too, especially since I plan to run to E30 map. I like the cooling effect of ethanol

 

[Terry]

Is there a 92 Map potentially in the works? I would love to run a 92 map on 93 octane with performance lying somewhere in between the 91 and 93 Map. That would be huge and I'm sure many people would run that map due to potential concerns about the 93 Map.

Sure we can customize maps as needed. Keep those logs rolling in as that helps us evaluate things!