[M.Power]

I was wondering if I could get some feedback from others who are running a JB4 tune on their M5. I just got mine in the mail and called around a few shops to get it installed and a few of them told me it's a very unreliable tune especially for the F90 and triggers tranny issues. I want to hear from people who have had it on their car for a decent amount of time before deciding what to do. Thanks guys!

[Fuel-It!]

I've yet to hear of a single transmission issue with it. With the latest V6 firmware additive maps I've seen some really impressive performance results and a lot of feedback on how smooth it's become.

Like most systems I'd suggest installing yourself so you can remove it if you ever need to. Some shops really rip people off on stuff like that.

[M.Power]

Originally Posted by Fuel-It!

I've yet to hear of a single transmission issue with it. With the latest V6 firmware additive maps I've seen some really impressive performance results and a lot of feedback on how smooth it's become.

Like most systems I'd suggest installing yourself so you can remove it if you ever need to. Some shops really rip people off on stuff like that.

Thank you. I've been hearing that from a few people as well. I guess that specific shop hates JB4's for some reason.. lol.

[Fuel-It!]

That isn't a surprise the JB4 is more of a direct to customer sort of product, it's hard for shops to make money off it. Compared to flash maps which are all big profit margin.

[M.Power]

Originally Posted by Fuel-It!

That isn't a surprise the JB4 is more of a direct to customer sort of product, it's hard for shops to make money off it. Compared to flash maps which are all big profit margin.

Yeah, that makes sense. One of the shops was trying to convince me to get a flash map tune from them for $2500.

[bMm5w]

How does JB4 run on 91? Do you need 93 for it to work as intended?

[Fuel-It!]

Map1 is 91 octane compatible, save the higher maps for when you can mix in a little E85 or octane booster.

[limeypride]

Originally Posted by DirtyVegasMB

How does JB4 run on 91? Do you need 93 for it to work as intended?

I run on 92 octane pump + 8oz BOOSTane Pro per tank. That yielded well over 700 awhp on my first M5. For the second F90, that ran the 60mph sprint in 2.57s and the 1/4 mile on a farm road in 10.33s. My M8 is close to that, too.

It works... and then some.

PS: on the "unreliable" —> what a crock of shit! I've had it installed on 2 x F10 550s, 3 x F10 M5s, 2 x F06 M6 GCs, 1 x X5M, 2 x F90 M5s and my current M8. None of them are broken or adversely affected. Sheesh, I used the same JB on the first 7 or 8 of those I think.

It requires you to choose: go with its plug'n'play modes -OR- be prepared to experiment and assume the inherent risk. It is massively configurable and it will do as you tell it. Hopefully, the implication of that last sentence is clear.

[M.Power]

I've been running it on map 1 on 91 for about a week. Definitely feel a decent power difference.

[mike@x-ph.com]

Originally Posted by M.Power

I've been running it on map 1 on 91 for about a week. Definitely feel a decent power difference.

[BMWDriverX]

Originally Posted by M.Power

I've been running it on map 1 on 91 for about a week. Definitely feel a decent power difference.

Add 3 gallons of E85 to make a full tank with 91oct and switch to map 2

[YanoM5]

Originally Posted by limeypride

I run on 92 octane pump + 8oz BOOSTane Pro per tank. That yielded well over 700 awhp on my first M5. For the second F90, that ran the 60mph sprint in 2.57s and the 1/4 mile on a farm road in 10.33s. My M8 is close to that, too.

It works... and then some.

PS: on the "unreliable" —> what a crock of shit! I've had it installed on 2 x F10 550s, 3 x F10 M5s, 2 x F06 M6 GCs, 1 x X5M, 2 x F90 M5s and my current M8. None of them are broken or adversely affected. Sheesh, I used the same JB on the first 7 or 8 of those I think.

It requires you to choose: go with its plug'n'play modes -OR- be prepared to experiment and assume the inherent risk. It is massively configurable and it will do as you tell it. Hopefully, the implication of that last sentence is clear.

Hi Limey, fellow f90 pnw owner. I just got a jb4 what map did you run for the time you posted above? Did you always add the boost sane every fill up?

[limeypride]

Originally Posted by YanoM5

Hi Limey, fellow f90 pnw owner. I just got a jb4 what map did you run for the time you posted above? Did you always add the boost sane every fill up?

Maps 2 and 6. You'll need to experiment carefully and slowly with map 6.

I use BOOSTane at every fill up.

[YanoM5]

Originally Posted by limeypride

Maps 2 and 6. You'll need to experiment carefully and slowly with map 6.

I use BOOSTane at every fill up.

Thanks. I used to do the same with my F10 M5, just to be ready and run 93 octane. Also when I lived in Alaska we had the crappy 90oct, I'd run Torco to use my 93 map.

I think my friend form back home Kalani bought your last vehicle. How you liking the 4 door M8, that thing is huge?

I'm still learning the ins and outs with the JB4. I used to run Bootmod3 on my F10. I hope running the EWG and OBD cords wont give me a hard time. If I can do my own spark plugs on my F10, I'm sure I can figure it out.

Question though, in order to run map 2, do I need to connect the EWG and lastly Map 6, is that the learned map/tune, I've been hearing about?

Thanks again.

[BMWDriverX]

Originally Posted by YanoM5

Thanks. I used to do the same with my F10 M5, just to be ready and run 93 octane. Also when I lived in Alaska we had the crappy 90oct, I'd run Torco to use my 93 map.

I think my friend form back home Kalani bought your last vehicle. How you liking the 4 door M8, that thing is huge?

I'm still learning the ins and outs with the JB4. I used to run Bootmod3 on my F10. I hope running the EWG and OBD cords wont give me a hard time. If I can do my own spark plugs on my F10, I'm sure I can figure it out.

Question though, in order to run map 2, do I need to connect the EWG and lastly Map 6, is that the learned map/tune, I've been hearing about?

Thanks again.

You'll need the EWG for anything over map1, Map 6 is a custom map that you can make adjustments in order to produce more power but every change must be logged and checked to make sure you're running within safe parameters for the fuel that you're on. Personally I would run map1 on 91-93, map2 (EWG connected) 95oct+ using an additive, some 100oct, or 3 gals of E85 mixed in with a full tank, Map3 100oct+

[limeypride]

Originally Posted by YanoM5

Thanks. I used to do the same with my F10 M5, just to be ready and run 93 octane. Also when I lived in Alaska we had the crappy 90oct, I'd run Torco to use my 93 map.

I think my friend form back home Kalani bought your last vehicle. How you liking the 4 door M8, that thing is huge?

I'm still learning the ins and outs with the JB4. I used to run Bootmod3 on my F10. I hope running the EWG and OBD cords wont give me a hard time. If I can do my own spark plugs on my F10, I'm sure I can figure it out.

Question though, in order to run map 2, do I need to connect the EWG and lastly Map 6, is that the learned map/tune, I've been hearing about?

Thanks again.

Kalani did indeed take it--he LOVES it (as I told him he would ).

I'm loving the M8--it's my favorite of any car I've ever owned and that's quite a compliment.

The instructions are good enough for anyone with decent mechanical know how. I have Snohomish European do all my stuff--they're just down the road from me and he knows his stuff.

Anything above map 1 really requires EWG and OBD. Map 2 is a great daily as is map 1. Map 6 doesn't learn, you do . In addition to what was said below, map 6 is the one where you're most likely to destroy your engine if you get it wrong. Kalani is using it I think. You enter the boost targets, manually, and the car will try and hit them without bending a rod or something else similarly catastrophic.

[YanoM5]

Originally Posted by limeypride

Kalani did indeed take it--he LOVES it (as I told him he would ).

I'm loving the M8--it's my favorite of any car I've ever owned and that's quite a compliment.

The instructions are good enough for anyone with decent mechanical know how. I have Snohomish European do all my stuff--they're just down the road from me and he knows his stuff.

Anything above map 1 really requires EWG and OBD. Map 2 is a great daily as is map 1. Map 6 doesn't learn, you do . In addition to what was said below, map 6 is the one where you're most likely to destroy your engine if you get it wrong. Kalani is using it I think. You enter the boost targets, manually, and the car will try and hit them without bending a rod or something else similarly catastrophic.

Nice Nice. K and I used to run our GT-Rs when we were back home in AK. Then we both got F10's and now F90's without even planning; all great cars.

Thanks for all the input. I guess the last thing I had was, do you know what stock boost is? If I run map 1, I see it's 4 psi over stock. Besides running our 92 octane, will there be any benefits in power over safety by adding a little bit of Boostane?

Also I noticed map 2 says its 6 psi over stock. Looks like Terry recommends 93+ for this map. Will our 92 WA octane plus 6oz Boostane be safe w/noticable gains over map 1?

Sheesh, so many questions. Thanks for your time. I'm on thread 261 on the jb4 forms reading it till the end before I plug it in lol. I had the RaceChip for like 1 week and felt the gains on race mode, but got this JB4 with mobile for like $500 no brainer!

[YanoM5]

Originally Posted by BMWDriverX

You'll need the EWG for anything over map1, Map 6 is a custom map that you can make adjustments in order to produce more power but every change must be logged and checked to make sure you're running within safe parameters for the fuel that you're on. Personally I would run map1 on 91-93, map2 (EWG connected) 95oct+ using an additive, some 100oct, or 3 gals of E85 mixed in with a full tank, Map3 100oct+

thanks for the feedback

[limeypride]

Originally Posted by YanoM5

Nice Nice. K and I used to run our GT-Rs when we were back home in AK. Then we both got F10's and now F90's without even planning; all great cars.

Thanks for all the input. I guess the last thing I had was, do you know what stock boost is? If I run map 1, I see it's 4 psi over stock. Besides running our 92 octane, will there be any benefits in power over safety by adding a little bit of Boostane?

Also I noticed map 2 says its 6 psi over stock. Looks like Terry recommends 93+ for this map. Will our 92 WA octane plus 6oz Boostane be safe w/noticable gains over map 1?

Sheesh, so many questions. Thanks for your time. I'm on thread 261 on the jb4 forms reading it till the end before I plug it in lol. I had the RaceChip for like 1 week and felt the gains on race mode, but got this JB4 with mobile for like $500 no brainer!

For map 2, it's been revised. Now it's additive at +5 over stock. I use BOOSTane Pro so to get to 95 requires very little.

[YanoM5]

Originally Posted by limeypride

For map 2, it's been revised. Now it's additive at +5 over stock. I use BOOSTane Pro so to get to 95 requires very little.

When you run map 2. How much Boostane do you use for lets say 14 gallons of gas or do you recommend, since you add it every fill up, when running map 2?

[limeypride]

Originally Posted by YanoM5

When you run map 2. How much Boostane do you use for lets say 14 gallons of gas or do you recommend, since you add it every fill up, when running map 2?

They have a nifty chart: https://boostane.com/about-boostane/...-mixing-chart/

6oz is more than enough if your base gas is WA 92 octane (5.2oz per 20 gallon tank as the math goes).

[YanoM5]

Originally Posted by limeypride

That have a nifty chart: https://boostane.com/about-boostane/...-mixing-chart/

6oz is more than enough if your base gas is WA 92 octane (5.2oz per 20 gallon tank as the math goes).

Thank you sir.