[MTHX]

Hi Everybody.

I'm running in the same kind of problem.

My mods

Cat DP
JB4
BMS Air Intake
SparkPlug 2step colder gap at .020

Gaz:
VP MS109
15% E85 VP
Tank level : +1/4

Tire pressure:
Front : 37
Back : 36

My ign1 is very bad (my target is 15 and more) - Got 7-8-9 with race gaz ...

My IAT is high (range 120 - 140)
My best 1/4 : 11 at 129mph... not bad ... but i ran 11.2 stock ...


Have you resolve your timming issue ?

[JBA87]

Probably your IATs

Computer pulling timing to save engine

[BMWDriverX]

What version firmware are you on?

[JBA87]

Originally Posted by BMWDriverX

What version firmware are you on?

This too

[MTHX]

Originally Posted by BMWDriverX

What version firmware are you on?

The jb4 firware : v9

[MTHX]

Originally Posted by JBA87

Probably your IATs

Computer pulling timing to save engine

Did you install meth kit?

[ThatF90]

Jb4 is no good had it on my f90 and sold it within a month

[ThatF90]

Are you in south florida ?

[limeypride]

Originally Posted by ThatF90

Jb4 is no good had it on my f90 and sold it within a month

The JB4 is fantastic. I'll explain why I think that: I've owned 3 of them over the past 7 years or so on 3 x F10 M5s, 2 x F06 M6 GCs, 1 X5M, 2 x F90 M5s and my latest M8 Comp GC. My average 0-60mph in my last F90 was mid 2.6s; best = 2.57s. Similar numbers for the M8 but a little slower at best at 2.59s.

... now your turn.

[ThatF90]

Originally Posted by limeypride

The JB4 is fantastic. I'll explain why I think that: I've owned 3 of them over the past 7 years or so on 3 x F10 M5s, 2 x F06 M6 GCs, 1 X5M, 2 x F90 M5s and my latest M8 Comp GC. My average 0-60mph in my last F90 was mid 2.6s; best = 2.57s. Similar numbers for the M8 but a little slower at best at 2.59s.

... now your turn.

Nice numbers just saying from my experience the best i could get was 2.9 3.0 and the best 1/4 was 10.8 your also got those times in 50 degree colder weather

[ThatF90]

Originally Posted by ThatF90

Nice numbers just saying from my experience the best i could get was 2.9 3.0 and the best 1/4 was 10.8 your also got those times in 50 degree colder weather

DME tuning ftw though cut my times from 10.8 down to 10.3 !

[limeypride]

Originally Posted by ThatF90

DME tuning ftw though cut my times from 10.8 down to 10.3 !

Nice!

Do you have a time slip or Dragy reference for that run? I'd love to see the details: 60 ft, DA, etc.

// EDIT

Disregard. I found you on the Dragy leaderboard.

That's a good time no doubt.

That said, though, it has to be pointed out that even with your DA and temp disadvantage, you've got DPs (pri/sec), a DME tune, intake and meth injection and yet you're still slower (granted, only just and that could be attributable to a burger one of us ate beforehand ). Nonetheless, I had a $900 JB4 and a farm road.

[limeypride]

Originally Posted by ThatF90

Nice numbers just saying from my experience the best i could get was 2.9 3.0 and the best 1/4 was 10.8 your also got those times in 50 degree colder weather

Yup. No doubt my DA is favorable to say the least. However, the JB4 cut my stock time from 11s and 10.9s to a consistent high
10.3s or 10.4s hence my point of contention with your original post. My best is 10.33s.

[GTATX]

Can U guys explain this correction after I input my draggy times? Does this mean if DA was optimal those would be the numbers at the bottom plus minus few milliseconds?

Mods:

Eurocharged Stage 1
E30 mix
Secondary delete
Remus catback non resonated straight mid pipe
Charcoals delete
Kn&n drop in
305-35-20 PS4S rear (speedometer is spot on with GPS with this size)

[GTATX]

Also is there any benefit of running jb4 on top of stage one tune as I wouldn't do primary cats and can't go stage 2?

[BMWDriverX]

Originally Posted by MTHX

The jb4 firware : v9

I would revert back to stable version V5, I am running that firmware on maps 1 and 2 and they felt better than V9. I would wait for V9 to become stable like V5 before trying to push your car on it, when they are not stable beta testers are sending in logs to BMS and they make adjustments so unless you are doing that I would run the most stable version of the firmware.

[MTHX]

Originally Posted by BMWDriverX

I would revert back to stable version V5, I am running that firmware on maps 1 and 2 and they felt better than V9. I would wait for V9 to become stable like V5 before trying to push your car on it, when they are not stable beta testers are sending in logs to BMS and they make adjustments so unless you are doing that I would run the most stable version of the firmware.

Thanks.

I'll install the v5.

[BMWDriverX]

Originally Posted by MTHX

Thanks.

I'll install the v5.

I just checked the app and noticed there is now a stable V9 where maps 1 & 2 seem to be the same as they were on V5, i'm going to upload V9 and run map 1, see how that goes and then move up to map 2 on some E85

[MTHX]

jb4 not bad ...

street tire
10.28 @ 136

[kingmonkeyjr]

JB4 Map3 E30 blend with 91.

Could get a better 60ft as I'm getting wheel spin.

Need some 1/4th mile in SoCal

[A Need For Speed]

Originally Posted by Hockeytyme

Map2 averages 22 or so for me but peaks at 26/27/28 at times. That's why I wont run it without at least 97 octane or higher. It's suppose to add 5.3lbs but with spikes it can go high.

I fear for guys playing with JB4. I wish it had a warning when you select maps and said "requires xx amount of octane" JB4 is powerful and a good tool but you really have to use it with caution and reading and comparing logs with the guys at BMS.

I attached an old v3 guide but we are on v5. It says 93 is okay for map2 but I wouldn't do it as you can see how much it boosts at times.

This is very confusing. I specifically asked Terry about safety and Map 2 with 93 octane pump gas and he specifically told me 93 octane was fine for Map 2. Is he wrong? Very curious. I have run it for a year without problems and I mean run it.

[limeypride]

Originally Posted by A Need For Speed

This is very confusing. I specifically asked Terry about safety and Map 2 with 93 octane pump gas and he specifically told me 93 octane was fine for Map 2. Is he wrong? Very curious. I have run it for a year without problems and I mean run it.

Map 2 with V9 is very different to V6 and earlier. The latter isn't suitable for 93 octane.

Read the blog post—post #1—that covers both versions.