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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > Anyone who's very familiar with JB4?



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      11-18-2013, 07:20 PM   #1
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Anyone who's very familiar with JB4?

I know many people will tell me to search it my self but I will just ask the questions straight away because they are not that easy to find...

1.Why those people always mix E85 with their petrol? any good?

2.According to the user guide, map 5 is a map that can check many things of the car and gives the best performance from the engine, then why nearly nobody use it.

3.what does flash means

4.How to pass the MOT after I change the down pipes, will the down pipes reduce the torque.

5.Am I still be able to choose JB4 menus if I change to M3 cluster(swap the mother board of cluster)

those are the questions so far, anyone can give any idea then I will appreciated...
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      11-19-2013, 01:14 AM   #2
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1. Does not affect you, cant get it here but it has a better octane level so, more power.

2. Loads of people use it, dont know where you heard that

3. Getting your bits out in the park ?

4. generally if the car is warmed up, it will be ok but, has been known to be close on emissions.

5. Not sure [ also not sure why you would want a M3 dash ]
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      11-19-2013, 08:20 AM   #3
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Quote:
Originally Posted by Sparky68 View Post
1. Does not affect you, cant get it here but it has a better octane level so, more power.

2. Loads of people use it, dont know where you heard that

3. Getting your bits out in the park ?

4. generally if the car is warmed up, it will be ok but, has been known to be close on emissions.

5. Not sure [ also not sure why you would want a M3 dash ]
Cheers bro, may I ask what mod do u have on your car?
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      11-19-2013, 09:34 AM   #4
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1) As above - not available in the UK unfortunately

2) Map 5 pushes up boost based on conditions, mods and octane. Everyone should use it as their map of choice unless running meth (map3).

3) A Flash is a remap of the ECU delivered via the OBD port. Most tuning companies produce flash maps delivered via laptops and cables or dedicated hardware. There are now opensource maps freely available for people with Bavarian Technic cables..

4)DPs and MOTS are a risky business. If the MoT tester notices and cares - its an automatic fail to remove emissions devices from the exhaust.. If he doesn't notice or care there is still the risk of failing the emissions test. Mine failed a couple of weeks ago - I suspect my plugs need changing though. He let it through anyway.

5) I'd expect the cluster to still work if its plug and play and required no coding. Best check with Terry@BMS
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      11-19-2013, 09:46 AM   #5
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It might sound a harsh thing to say, but if you are going that far to create an M3 replica and want the power, you'd maybe be better buying an M3.
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      11-19-2013, 09:51 AM   #6
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Ive got catless downpipes, lost a bit of low down torque but it pulls harder up top.

Quote:
Originally Posted by Kerr View Post
It might sound a harsh thing to say, but if you are going that far to create an M3 replica and want the power, you'd maybe be better buying an M3.
If he wants to put an M3 cluster on his car he can...you've always got something to say.
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      11-19-2013, 09:51 AM   #7
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Quote:
Originally Posted by Kerr View Post
It might sound a harsh thing to say, but if you are going that far to create an M3 replica and want the power, you'd maybe be better buying an M3.
Insurance bro -.-
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      11-19-2013, 11:08 AM   #8
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I drive m3's all the time and apart from the power they're just annoying as a normal drive.Very sluggish low down, noisey,awful on fuel,clutch on manuals is rubbish,and the DCT is no match for a proper auto.Aside from the looks I much prefer jumping into my 335i after work and having a useable drive.And once it's tuned will be almost as quick as one.I like the combo of m3 looks and 335 I useability.
Kris
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      11-19-2013, 12:57 PM   #9
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Quote:
Originally Posted by KrisM79 View Post
I drive m3's all the time and apart from the power they're just annoying as a normal drive.Very sluggish low down, noisey,awful on fuel,clutch on manuals is rubbish,and the DCT is no match for a proper auto.Aside from the looks I much prefer jumping into my 335i after work and having a useable drive.And once it's tuned will be almost as quick as one.I like the combo of m3 looks and 335 I useability.
Kris
Hmm, I test drive my friend's E46 M3. the steering is so vague, haven't got a chance to drive a E92 M3 actually but some others people also complain about the steering, well I thought E92 M3 is not very bad on MPG is it?
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      11-19-2013, 02:03 PM   #10
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It's awful on fuel,it's got massive fuel injectors and independent throttle bodies.Lucky to get 15 mpg urban and low 20's on a motorway.The e46 and e92 m3's are nothing alike.The e46 feels ancient to drive in comparison to the e92.Its just not worth the extra costs over the 335.I had a chance at a brand new e92 m3 on lease a whole back for £350 a month but turned it down due to stupid running costs.
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      11-19-2013, 02:06 PM   #11
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Quote:
Originally Posted by KrisM79 View Post
It's awful on fuel,it's got massive fuel injectors and independent throttle bodies.Lucky to get 15 mpg urban and low 20's on a motorway.The e46 and e92 m3's are nothing alike.The e46 feels ancient to drive in comparison to the e92.Its just not worth the extra costs over the 335.I had a chance at a brand new e92 m3 on lease a whole back for £350 a month but turned it down due to stupid running costs.
holy carp, I remember fifth gear said it is greener and more fuel economical -.-
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      11-19-2013, 02:14 PM   #12
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Haha than a dodge viper?
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      11-19-2013, 06:58 PM   #13
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Quote:
Originally Posted by KrisM79 View Post
Haha than a dodge viper?
you just gave me one more excuse to build a N54 E92 M3
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      11-19-2013, 07:45 PM   #14
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Quote:
Originally Posted by Dirty Tool View Post
Ive got catless downpipes, lost a bit of low down torque but it pulls harder up top.



If he wants to put an M3 cluster on his car he can...you've always got something to say.
I notice KER has lots of opinions lately and like to argue.
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      11-20-2013, 12:31 AM   #15
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Quote:
Originally Posted by Dirty Tool View Post
Ive got catless downpipes, lost a bit of low down torque but it pulls harder up top.



If he wants to put an M3 cluster on his car he can...you've always got something to say.
It is purely up to him. I never said otherwise.

The forum would be very quiet if nobody had anything to say.

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Originally Posted by Yoro35i View Post
I notice KER has lots of opinions lately and like to argue.
Lol. Think you've had more than your fair share of "moments".
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      11-20-2013, 10:06 AM   #16
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OHHH YEEAAAHHH HERE WE GOO!!!!

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      11-20-2013, 01:11 PM   #17
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Originally Posted by Josh1a1h View Post
OHHH YEEAAAHHH HERE WE GOO!!!!

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      11-27-2013, 03:22 AM   #18
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Quote:
Originally Posted by z19930612
2.According to the user guide, map 5 is a map that can check many things of the car and gives the best performance from the engine, then why nearly nobody use it.
I had my new (to me) e90 335i dyno'd 2 weeks ago with DCI and JB4 fitted.

I had given the car a day in map5 to let the autotune work with a few hard runs, so on the dyno ran my first run on map5, then switched to map1 for the second run. There was literally 1hp difference between them. Both made 360bhp/360lbs ft.
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      11-27-2013, 04:18 PM   #19
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Quote:
Originally Posted by EhFit
Quote:
Originally Posted by z19930612
2.According to the user guide, map 5 is a map that can check many things of the car and gives the best performance from the engine, then why nearly nobody use it.
I had my new (to me) e90 335i dyno'd 2 weeks ago with DCI and JB4 fitted.

I had given the car a day in map5 to let the autotune work with a few hard runs, so on the dyno ran my first run on map5, then switched to map1 for the second run. There was literally 1hp difference between them. Both made 360bhp/360lbs ft.
Very interesting!

Presumably those figures are at the wheels?
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      11-28-2013, 04:15 AM   #20
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Quote:
Originally Posted by rawbhp View Post
Very interesting!

Presumably those figures are at the wheels?
No, I'd imagine that's ATF (DynoDynamics RR). What's RWD transmission loss, 14-17%? If it were ATW that would give me ATF figure of around 385bhp+ which is too high for the mods I have (from what I garner through previous research).

I'd need to get downpipes, FMIC and run map2/map5 to extract more power.
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      11-28-2013, 12:17 PM   #21
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Oh ok-makes sense.

So the 400bhp+ figure that is quoted on the JB website is presumably with a full set of mods?

Just curious to work out how much power mine will put out with map 5 and no mods at all. Either way I can certainly feel the difference!
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      11-28-2013, 12:28 PM   #22
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Quote:
Originally Posted by rawbhp View Post
Oh ok-makes sense.

So the 400bhp+ figure that is quoted on the JB website is presumably with a full set of mods?

Just curious to work out how much power mine will put out with map 5 and no mods at all. Either way I can certainly feel the difference!
370-380 on stock I think is what you can get. More than that you need to go catless.
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