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      10-31-2011, 10:34 PM   #1
Alpha_Zulu
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JB4 N54 Stage 3 Tune - HOLY SH**

So yeah I just got this installed over weekend.


HOLY MOTHER OF GOD


This little white Z4 is now a beast! It's unquestionably faster and noticeable.

And to top it off, I'm getting better fuel economy.
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      11-01-2011, 07:53 AM   #2
BMWM4
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and you have the 35is model? that strange because your probably running lower boost now. stock up to 14.5 psi in over boost jb4 without downpipes probably doesn't boost that high. So maybe more responsive but I don't know about over all speed,
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      11-01-2011, 10:14 AM   #3
ModBargains IV
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Glad to see that your enjoying the JB4 Stage 3 - can't go wrong with BMS products.
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      11-01-2011, 01:37 PM   #4
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Quote:
Originally Posted by z435is View Post
and you have the 35is model? that strange because your probably running lower boost now. stock up to 14.5 psi in over boost jb4 without downpipes probably doesn't boost that high. So maybe more responsive but I don't know about over all speed,
JB4 Disables the IS Motors Over boost option and is always a 15psi now
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      11-01-2011, 03:06 PM   #5
BMWM4
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right, but on maps 1 and 2 i don't think it boosts that high. I believe its 13 and 14 psi respectively, and also that means that when at at WOT both cars should be equivalent right because they will both be at 14.5 or 15 psi
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      11-01-2011, 08:46 PM   #6
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Quote:
Originally Posted by z435is View Post
right, but on maps 1 and 2 i don't think it boosts that high. I believe its 13 and 14 psi respectively, and also that means that when at at WOT both cars should be equivalent right because they will both be at 14.5 or 15 psi
that's incorrect. 15psi boost target for map 2 and that's not only for 7 secs like stock. Huge difference in acceleration and mid range on my 35is with DCI.
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      11-02-2011, 05:38 PM   #7
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Quote:
Originally Posted by Alpha_Zulu View Post
So yeah I just got this installed over weekend.


HOLY MOTHER OF GOD


This little white Z4 is now a beast! It's unquestionably faster and noticeable.

And to top it off, I'm getting better fuel economy.
seat of the pants is something.have you put your car on a dyno before and after numbers dont lies.
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      11-02-2011, 05:41 PM   #8
BMWM4
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ya i would love to see a dyno because .5psi shouldn't really influence it. I really hope Im wrong I really want to get it, but it just hasn't convinced me...yet
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      11-03-2011, 11:36 AM   #9
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+1 for dyno graph
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      11-03-2011, 06:30 PM   #10
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Congrats Alpha Zulu! From what I've read just wait until you blend 100 octane with 91, set it on autolearn Map 5 and hit 17psi with just dci. Or straight 100 and set it on Map 7!!
I live in CARB country and can only drool about you guys elsewhere.
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      11-13-2011, 10:32 AM   #11
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Quote:
Originally Posted by Alpha_Zulu View Post
So yeah I just got this installed over weekend.


HOLY MOTHER OF GOD


This little white Z4 is now a beast! It's unquestionably faster and noticeable.

And to top it off, I'm getting better fuel economy.
@Alpha_Zulu

Which map are you using for JB4?Stock Or MOD?

BR
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      11-15-2011, 03:24 AM   #12
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Quote:
Originally Posted by z435is View Post
ya i would love to see a dyno because .5psi shouldn't really influence it. I really hope Im wrong I really want to get it, but it just hasn't convinced me...yet
well I think the main difference is it's constantly there, no need to press an extra button...and it lasts longer than 7 seconds
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