Jb4 (bmw m4) map questions

[achi 3.0]

Yes we have Aral Ultimate 102 Octane and Shell V Power with 100 octane but this is ROZ and in the USA the people talks about (ROZ+MOZ)/2)

US 87 is EU 87
US 90 is EU 95
US 93 is EU 98

I think it is like this but i am not sure.

Also in germany all tuners talks about MHP not WHP.

[Mike@N54Tuning.com]

Originally Posted by New435iguy

Could you please explain why.
I was told that it will be same as map 1 but with higher octane will be better

I don't think the person you were talking to is correct or maybe didn't understand your question fully. How can map2 which targets higher boost be the same as map1 which targets lower boost. If you run too high boost for the octane you will not make more power then a map properly set for your car. You may in fact have less performance then a proper map. Run the correct map and call it a day.

Mike

[sadeem28]

Originally Posted by BoostnM

Yes, the higher the octane the better performance.

thx, now If I already have 91+ lets say half a tank can I just add the 94 ?

[sergkoko]

I have a gas station up the street from my house that sells 100 octane, and E85 here in Arizona. We also only have 91 as a premium, no 93. The only reason they sell 100 though is because it's on the main road that goes out to the race track. I have not seen too many stations that sell 100 in my travels. Just some reference as to what is available.

PS I ran my other cars on Map 2 with 91 and it was fine (same written requirements from BMS), the last one had good logs with E85 and without.

ADDED: Really the best resource for anything JB4 related is N54Tech.com, much more indepth info and support.

[infamousdiz]

Originally Posted by Mike@N54Tuning.com

I don't think the person you were talking to is correct or maybe didn't understand your question fully. How can map2 which targets higher boost be the same as map1 which targets lower boost. If you run too high boost for the octane you will not make more power then a map properly set for your car. You may in fact have less performance then a proper map. Run the correct map and call it a day.

Mike

Can you run map 2 without DPs but the higher octane 93+, any advantage? How about Map 7 race gas 100octane+ stock car, will that add any power?

[coolmody]

Originally Posted by New435iguy

These jb4 guys really need to make a nice page
On their website explaining what has what it's like a goddam
Maze trying to find some info lol.

Completely agree. It's tough finding the information you need in that thread.

For example, I thought the JB4 cleared the codes automatically when you have catless downpipes, but it doesn't with the configuration out of the box. I had to find some random thread that tells you to set FUD = 90 in the JB4 app. It took me awhile to even figure out that FUD means "Future Use D"!

Back to the original topic, I'm currently running 94 octane (with 10% ethanol) on Map 2 with catless downpipes. Runs nice and smooth with plenty of power.

[sergkoko]

In their defense, things change all the time with the firmware and most guys who are changing individual settings are pretty familiar with how the box works. I am guessing the reason they don't make a page with lots of info is because it can change at anytime and then they would have to change the info across a lot of forums etc. In my experience reading all those posts in line gives a good idea about little random details and stuff so when you get to that phase in your tuning you already have all the answers. I agree though there could be a little more organized way of sharing that data somewhere.

[filetitan]

Originally Posted by pikkagtr

Question for you Mike,
Once the obd adaptor is available, which wires no longer need to be connected under hood ie spliced and which are still required to be connected for map 2 with e85
TIA

Did you find the answer for this by any chance?

[lgk]

Some gas stations attendants know 100 octane as "Motorcycle Fuel"

Also, a lot of motorcycle shops sell 5 gallon drums of race fuel, or race fuel and you bring your own gas can to fill up.

We are relatively lucky here in Charlotte, NC as we are a race town and the're a fair number of stations that sell 100 octane fuel.

[Reid]

Originally Posted by filetitan

Did you find the answer for this by any chance?

The obd port adapter replaces the two CAN wires that used to be spliced into the factory harness.

All other connectors are used in the same way.

[Wes0310]

What i can reach with Map 7 + Aral Ultimate 102 or V-Power 100?

If my car has only the BMS Air Intake all other parts are standard??

[Mike@N54Tuning.com]

Originally Posted by Reid

The obd port adapter replaces the two CAN wires that used to be spliced into the factory harness.

All other connectors are used in the same way.

+1

Mike

[Mike@N54Tuning.com]

Originally Posted by Wes0310

What i can reach with Map 7 + Aral Ultimate 102 or V-Power 100?

If my car has only the BMS Air Intake all other parts are standard??

Are you asking what power you will have with only JB4 on map7 with race gas?

Mike

[Wes0310]

Originally Posted by Mike@N54Tuning.com

Are you asking what power you will have with only JB4 on map7 with race gas?

Mike

Yes

[Mike@N54Tuning.com]

Originally Posted by Wes0310

Yes

Map7 on race gas makes around 500-520whp

Mike

[Wes0310]

and when i have only BP Aral Ultimate 102 Octane ROZ and 90 MOZ

[m4rawrr]

Hey I just got a jb4 installed yesterday! added 4.5gallons of e85 to a full tank of 91 last night and am running map2 and loving it so far. I was wondering if I could add torco on top of this and maybe run map7?

[Mike@N54Tuning.com]

Originally Posted by m4rawrr

Hey I just got a jb4 installed yesterday! added 4.5gallons of e85 to a full tank of 91 last night and am running map2 and loving it so far. I was wondering if I could add torco on top of this and maybe run map7?

You should be able to try either map but follow the below and best to log it and see how car is behaving.

Mike


E85 Mixtures:

We've done limited testing with E85 mixtures and found that the platform seems to be largely tolerant to up to 4-5 gallons of E85 per full tank of pump gas. Higher mixtures normally result in fuel trims maxing out and engine stuttering or misfiring. Raising "open loop" from the default value of 60 to 70 can help allow a bit more power on E85 but may also increase the likelihood of a "fuel pressure too low" fault code. We suggest map 2 for E85 mixtures as it offers the best all around compromise of power and reliability with it. The Stage3 fuel connector is required for any E85 mixture.

Map 7: Race gas map. Requires 100 octane unleaded fuel and for the fuel mass connector to be installed. Can be used with or without the EWG connectors but will make more power with the EWG connectors installed. This map can also be used with up to 35% E85 but in some vehicles & conditions this may cause a high fuel pressure drop and resulting stuttering. If this occurs drop down to map 2.

[CAOZKAN]

I ran jb4 map2 with 91, when the weather was cold I didn't have problems but in the summer it started to go to limp mode, therefore I stopped using it till fall. Btw I was having the limp mode after few laps on Trackdays, I didn't have it meanwhile driving on the streets.

[Shanekirk78]

I'm a first time owner of a 2015 BMW M4 and I put the Jb4 on it already had upgraded charge pipes air breathers and was wondering what is the best way to tune on map6 to get the most boost and such

[Ropes]

One, holy resurrection. Two, depends on octane. Three, would start with map 3 and log first. Depending on logs move up to 1/2 or 5. Boost is only one portion of the equation. Good luck