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      11-14-2011, 12:20 AM   #1
Ken1981
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Any Z4 35is with JB4

Greeting,

Anyone have good result with JB4 on 35is?

HP gain over stock car?

HP gain over MOD car? MOD part ...

Which Map and HP gain ?

Which JB4 firmware installed?

Thanks ~

BR
Kenneth
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      11-15-2011, 03:22 AM   #2
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Quote:
Originally Posted by Ken1981 View Post
Greeting,

Anyone have good result with JB4 on 35is?

HP gain over stock car?

HP gain over MOD car? MOD part ...

Which Map and HP gain ?

Which JB4 firmware installed?

Thanks ~

BR
Kenneth
Jb4 Map 1 will add a great deal of power

my Z4 is faster than an iS if I have a Jb+ in it

Imagine how fast the IS will be with a Jb4
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      11-15-2011, 06:55 AM   #3
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Quote:
Originally Posted by persian54 View Post
Jb4 Map 1 will add a great deal of power

my Z4 is faster than an iS if I have a Jb+ in it

Imagine how fast the IS will be with a Jb4
not sure about JB+, had a a run with 335 with jb+ and was able to outrun it

jb4 is def more powerful, any traction issues? i'm not a fan of LC so with DCT traction is a factor.

any number in terms of time? 1/4 mile?
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      11-15-2011, 10:05 AM   #4
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I would love to see a dyno comparing the before and after the addition of a jb4, because as far as i know they both boost the same (roughly 15psi) so at least for the seven seconds that the car allows the 15 psi boost (probably similar to jb4 as well due to heat soak) it should be very close. Thats why i would love to see a dyno comparison because theoretically it should be very similar.
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      11-15-2011, 11:10 AM   #5
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Quote:
Originally Posted by z435is View Post
I would love to see a dyno comparing the before and after the addition of a jb4, because as far as i know they both boost the same (roughly 15psi) so at least for the seven seconds that the car allows the 15 psi boost (probably similar to jb4 as well due to heat soak) it should be very close. Thats why i would love to see a dyno comparison because theoretically it should be very similar.
+1
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      11-15-2011, 11:36 AM   #6
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Quote:
Originally Posted by ZheHbKa View Post
not sure about JB+, had a a run with 335 with jb+ and was able to outrun it

jb4 is def more powerful, any traction issues? i'm not a fan of LC so with DCT traction is a factor.

any number in terms of time? 1/4 mile?
can't compare a Z4 to a 335i

Z4 has DCT, 335i does not.
Z4 weighs less.

stock for stock, a Z4 35i is faster than a 335i.

what a JB+ does it generally increases the boost to about 10PSI, depending on that the setting is

if you put it on 100%, you're at 13 i think.


Traction is an issue with any LC.

my M3 has traction issues as well.

my z4 has LC traction issues stock lol

no 1/4 mile times...

but my old z4 35i with a jb4 alpha (first z4 with a jb4, and BMS was testing how to use it with the DCT), i did a 1-60 in 4.31

don't quote me, it's been a while...

287whp stock, 349whp after Jb4 alpha
288wtq stock, 351wtq

good numbers
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      11-15-2011, 01:11 PM   #7
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Quote:
Originally Posted by persian54 View Post
can't compare a Z4 to a 335i

Z4 has DCT, 335i does not.
Z4 weighs less.

stock for stock, a Z4 35i is faster than a 335i.

what a JB+ does it generally increases the boost to about 10PSI, depending on that the setting is

if you put it on 100%, you're at 13 i think.


Traction is an issue with any LC.

my M3 has traction issues as well.

my z4 has LC traction issues stock lol

no 1/4 mile times...

but my old z4 35i with a jb4 alpha (first z4 with a jb4, and BMS was testing how to use it with the DCT), i did a 1-60 in 4.31

don't quote me, it's been a while...

287whp stock, 349whp after Jb4 alpha
288wtq stock, 351wtq

good numbers

Good numbers indeed, I,d like to run a stock z35 and see the difference

I used passport timer and got 4.3 0 to 60, not sure how accurate that is

I like jb+ for installation simplicity
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      11-15-2011, 06:10 PM   #8
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Quote:
Originally Posted by ZheHbKa View Post
Good numbers indeed, I,d like to run a stock z35 and see the difference

I used passport timer and got 4.3 0 to 60, not sure how accurate that is

I like jb+ for installation simplicity
Ya JB+ is great

JB4 is where it's at though
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      11-15-2011, 08:18 PM   #9
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Quote:
Originally Posted by persian54 View Post
Ya JB+ is great

JB4 is where it's at though
yeah i know

i'll consider it in spring, i want to ride in a tuned car to feel the difference, a lot of mixed reviews with IS
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      11-16-2011, 08:58 PM   #10
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Quote:
Originally Posted by Ken1981 View Post
Greeting,

Anyone have good result with JB4 on 35is?

HP gain over stock car?

HP gain over MOD car? MOD part ...

Which Map and HP gain ?

Which JB4 firmware installed?

Thanks ~

BR
Kenneth
See my thread here

http://e89.zpost.com/forums/showthread.php?t=605539
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      11-16-2011, 09:23 PM   #11
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Christmas present is coming from the mrs. Will let everyone know soon. Will be putting it on the dnyo and doing 1/4 track and BMW performance center tracks times to show the gains! Looking forward to it!
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      11-16-2011, 11:03 PM   #12
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wow that would be incredible! you would do everyone a great favour!
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      11-17-2011, 08:49 AM   #13
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Quote:
Originally Posted by XStarkX View Post
Christmas present is coming from the mrs. Will let everyone know soon. Will be putting it on the dnyo and doing 1/4 track and BMW performance center tracks times to show the gains! Looking forward to it!
Must be nice living right next door to the Performance Center! Don't need a hotel to go to their driving schools.
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      11-17-2011, 05:54 PM   #14
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Haha, it's very nice. Also when you work for them...
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      11-17-2011, 06:01 PM   #15
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You work there?! Please say more!
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      11-17-2011, 06:18 PM   #16
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Quote:
Originally Posted by XStarkX View Post
Haha, it's very nice. Also when you work for them...
i am jalous!
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      11-17-2011, 07:18 PM   #17
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it's night and day. I am running DCI + JB4 Map2 here in my 35is.

Last edited by SANguru; 11-17-2011 at 07:34 PM..
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      11-17-2011, 07:24 PM   #18
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Originally Posted by SANguru View Post
it's night and day. I am running DCI + JB4 Map2 here.
Youre running map2 without DPs?

And doesnt cali only have 91, no 93?
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      11-17-2011, 07:36 PM   #19
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Quote:
Originally Posted by STOOF View Post
Youre running map2 without DPs?

And doesnt cali only have 91, no 93?
91 on map2 with no DP since nobody makes them.. running fine. everything looks fine from the data collected on hard runs. Did a track day also with max cool on with no issues.
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      11-17-2011, 07:39 PM   #20
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Nice!

I get 93 around here but was worried about no DPs. Ill have to kick it up to map 2
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      11-17-2011, 07:50 PM   #21
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Quote:
Originally Posted by STOOF View Post
Nice!

I get 93 around here but was worried about no DPs. Ill have to kick it up to map 2
you can also run Map5 that auto optimizes target boost.
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      11-18-2011, 12:30 PM   #22
Ken1981
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Thanks for all replies...

Quote:
Originally Posted by SANguru View Post
it's night and day. I am running DCI + JB4 Map2 here in my 35is.
Pal ,

Without downpipes...35is + JB4 can run smoothly at map 2 without any issue?

Actually I still thinking weather stock piping can sustain 15psi or map 2 setting for long run or not ...


BR
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