[kd0t]

Hello,

Is there any particular reason why a majority of JB4 users prefer running map 1 instead of map 5?

I thought map 5 learns based on temperatures, IAT, mods, etc.

Am I missing something?

[BD_F22]

Yes, I myself prefer map 1 because it's consistent power and you know exactly what you are getting opposed to map 5 pretty much adjusting itself all the time.

[kd0t]

Hmm forgive me if I sound ignorant, but wouldn't it be better to let the tune learn the car over a period of time to produce the best gains? Map 1 is a fixed tune but as well all know, every car is a little different.

[pikcachu]

what i heard is that it's not that it "learns" over a period of time but it changes constantly... and apparently it changes so much that at one moment you have X horsepower and 3 mins later you have X-50

So i think that's what people complain about it... rather have a constant known power than the power going up and down

[Bee Pee]

Map 1 needs no extra mods.

Map 5 can be used on a stock car but not sure you'd see much benefit over map 1.

However, if you add bolt ons to allow JB4 to target higher boost ie DP, map 5 comes into its own.........you wont run map 1 again !!

[BD_F22]

What he said^

I usually only run map 5 if I have e85 in the tank so it can adjust for octane and raise boost. DP I still prefer map 2 for more consistency. At the end of the day you just need to experiment with the maps that support your mods and determine which you like better. It all comes down to personal preferance.

[mike@x-ph.com]

map 1 is same boost targets no matter which mods you have
map 5 auto tunes and changes boost target depending on your mods, fuel and IAT.

You need to test drive both and decide which one you like better.
I like map 5 because it has smoother power delivery but then again i am FBO with e50

[kd0t]

Hmm good to know!

I will do some testing later. Map 1 is already a monster with intake and dp on 91 octane

Sucks we can't get 93 in socal :/

[Bee Pee]

M8 -if you think map 1 is good, wait until you try maps 2, 5, 6 or 7 with suitable BO's and fuel grade. Its LoL fast !!!

[Roshi]

Originally Posted by kd0t

Hmm good to know!

I will do some testing later. Map 1 is already a monster with intake and dp on 91 octane

Sucks we can't get 93 in socal :/

You can get 100 at Unocal in West L.A.

[kd0t]

Not sure if I'm crazy or not but it feels like the car pulls harder on map 1 with 91 octane than map 2 with 93 octane?

Although I must admit map 5 is a lot smoother

[Béhème]

Originally Posted by mike@x-ph.com

map 1 is same boost targets no matter which mods you have
map 5 auto tunes and changes boost target depending on your mods, fuel and IAT.

You need to test drive both and decide which one you like better.
I like map 5 because it has smoother power delivery but then again i am FBO with e50

Doses anyone know how the boost level on map 1 compares with the boost levels of JB Stage 1 and AFE Scorcher?

[mike@x-ph.com]

Originally Posted by Béhème

Doses anyone know how the boost level on map 1 compares with the boost levels of JB Stage 1 and AFE Scorcher?

Map 0: JB4 disabled
Map 1: Peak boost 12.5psi, suggest for most racing applications.
Map 2: Peak boost 14.0psi, suggested for those using exhaust mods and 93 RM2 octane or higher fuels
Map 3: Progressive methanol mapping
Map 4: Stock performance, JB4 on
Map 5: Autotuning, enabled in 8.8 and later firmware
Map 6: User definable map. Suggested for troubleshooting by professionals only.
Map 7: Race gas map. Peak boost 18.5psi. Requires straight unleaded race gas.

[alz0rz]

Map 2 peak is 14.5, not 14.0.

[M2TROLL]

So, I've got an xdrive m235i m performance exhaust and jb4 stage 2 on map 5...would you guys recommend map 1 for the time being and then going to map 5 when I install my downpipe? Can someone spell out the maps and uses by the extent of modifications you have? Have yet to go to map 1 since I started on map 5 as that was recommended by the motorsports garage I go to. Anyone seen better delivery from map 1 on a completely stock car compared to map 5 that can attest to it?

[kd0t]

I personally like map 5 a lot better than map 1. I have intake, jb4, and downpipe.

I feel like the power is a lot smoother than map 1 or 2, but again it's my opinion.

Like what others have stated - you just have to find what you prefer.

[Bee Pee]

Originally Posted by kd0t

I personally like map 5 a lot better than map 1. I have intake, jb4, and downpipe.

I feel like the power is a lot smoother than map 1 or 2, but again it's my opinion.

Like what others have stated - you just have to find what you prefer.

With these bolt-ons, map 5 will be far better than map 1.

Agree with your observation that map 5 [autotuning feature] does feel smoother than the maps with fixed parameters.

[Béhème]

Originally Posted by mike@x-ph.com

Map 0: JB4 disabled
Map 1: Peak boost 12.5psi, suggest for most racing applications.
Map 2: Peak boost 14.0psi, suggested for those using exhaust mods and 93 RM2 octane or higher fuels
Map 3: Progressive methanol mapping
Map 4: Stock performance, JB4 on
Map 5: Autotuning, enabled in 8.8 and later firmware
Map 6: User definable map. Suggested for troubleshooting by professionals only.
Map 7: Race gas map. Peak boost 18.5psi. Requires straight unleaded race gas.

Very clear, thanks. Doses anyone know the boost levels of JB Stage 1 and AFE Scorcher ?

[Buckeyes]

Originally Posted by Béhème

Very clear, thanks. Doses anyone know the boost levels of JB Stage 1 and AFE Scorcher ?

I've heard the boost on BMS stage 1 is 3 or 3.5 psi over stock and AFE is 4.5 over. Guys that have had both the stage 1 and jb4 set on map 1 have said they are very similar.

[mike@x-ph.com]

Originally Posted by Béhème

Very clear, thanks. Doses anyone know the boost levels of JB Stage 1 and AFE Scorcher ?

Originally Posted by Trcb777

I've heard the boost on BMS stage 1 is 3 or 3.5 psi over stock and AFE is 4.5 over. Guys that have had both the stage 1 and jb4 set on map 1 have said they are very similar.

last time i checked it was 3 for the JB and 4 for the afe.
That being said the JB is adjustable, you can increase it to 4 if you would like more power.

[LimeRockM235]

sorry to revive an old thread but if my car was stock other then the JB4, would i be correct in thinking that i should be on map 5 if i put e85 mixture in with my 93. and is there a ratio i should be putting in. also i have Sunoco 100 available is that better or worse?

[Jeff@TopGearSolutions]

Originally Posted by LimeRockM235

sorry to revive an old thread but if my car was stock other then the JB4, would i be correct in thinking that i should be on map 5 if i put e85 mixture in with my 93. and is there a ratio i should be putting in. also i have Sunoco 100 available is that better or worse?

Have you read the JB4 FAQ on E85?

E85 Use

Models equipped with the pneumatic wastegate & flex fuel connector may experiment with up to 40% E85 mixtures. Some cars tolerate E85 and some do not. Cars that do not tolerate the mix will "buck" or "miss" at full throttle. In some cases map 7 can be used on the E85 mix and in other cases map 2 is the highest that can be used. It's best to start slowly and work your way up in terms of aggressiveness when experimenting with E85 mixtures.