JB4 for N20 / N26 engines

[Seraphblade]

Seems like there are a couple of bros here that bought the JB from overseas and are looking for help with the installation and stuff... You guys can refer to the N54tech.com forums for information and download the installation guides from Burger Motorsports Install Guides & Support - BurgerTuning.com


For discussions, I've created this thread~~

Anyway, some clarifications:

Map 5 is not a auto tuning map. For the G5 board, yes, it is auto tuning from 12 - 17 PSI depending on your fuel. But that is for the N55 engines.

For the JB4 for the N20, Map 5 is peak boost 17 PSI for the 320 / 520.
Map 1 is peak boost 20 PSI.
Map 2 is peak boost 21 PSI.
Map 7 is race map, with peak boost at 23 PSI.

28s can run map 1, 2 and 7
20s can only run map 5.

From the support forum :
3) Those with a 320i/520i may only use map 5. Maps 1, 2, & 7 will cause the motor to run lean, knock, and other unpleasantness. Due to the lower factory boost targets in the 320i/520i they also require both the FlexFuel connector ($25) for proper fueling. Email us for additional information as needed.


Feel free to share the logs here so we can discuss about the ign adv and boost targets.

 

[Seraphblade]

Re: JB4 for N20 / N26 engines

Nokiaop, I think we talk and share on this forum easier.

 

[wt_know]

Re: JB4 for N20 / N26 engines

320i/520i no point to install ...

 

[Red_Bean_Bun]

Re: JB4 for N20 / N26 engines

I think before boosting - replace charge pipe first. Consider changing to low temp tstat or bypass it altogether. And add an OCC. All preventive measures that doesn't even cost a few bucks.

Also consider intake mods for more flow under boost ....... Then straighten out the base DME settings it will complement the boost ......

 

[egg2]

Re: JB4 for N20 / N26 engines

Take the 'meow' outta the exit pipes too, put a free-er flowing meow if u must...

 

[Jason8822]

Re: JB4 for N20 / N26 engines

Take the 'meow' outta the exit pipes too, put a free-er flowing meow if u must...

View attachment 58189

Better to have race meow, otherwise the smell is very obvious
Race meow FTW

 

[hktdc]

Re: JB4 for N20 / N26 engines

View attachment 58189

Better to have race meow, otherwise the smell is very obvious
Face meow FTW

Hi is this AR Design DP for the N20?

 

[Seraphblade]

Re: JB4 for N20 / N26 engines

I think before boosting - replace charge pipe first. Consider changing to low temp tstat or bypass it altogether. And add an OCC. All preventive measures that doesn't even cost a few bucks.

Also consider intake mods for more flow under boost ....... Then straighten out the base DME settings it will complement the boost ......

Occ just released for the n20. No charge pipe yet.

According to some testings, aftermarket intakes such as afe, bms generated 0 extra horses at 24psi of boost...

 

[Seraphblade]

Re: JB4 for N20 / N26 engines

View attachment 58189

Better to have race meow, otherwise the smell is very obvious
Face meow FTW

Agreed.. I sold my er downpipe because of the smell..
But high flow cats that super expensive. Saw 1 for almost 2k for additional 5-10 horse.
Not worth it until the dme gets cracked so that we can reflash and get more control over the ecu...

 

[Red_Bean_Bun]

Re: JB4 for N20 / N26 engines

The n20/26 seems like a very efficient engine ........breathes really well in that case.

Then the next idea is to look at power train losses .......

Occ just released for the n20. No charge pipe yet.

According to some testings, aftermarket intakes such as afe, bms generated 0 extra horses at 24psi of boost...

 

[Jason8822]

Re: JB4 for N20 / N26 engines

Occ just released for the n20. No charge pipe yet.

According to some testings, aftermarket intakes such as afe, bms generated 0 extra horses at 24psi of boost...

I managed to find a F30 + N20 chargepipe here
N20 (2.0T) F30 Charge Pipe |

 

[Jason8822]

Re: JB4 for N20 / N26 engines

Hi is this AR Design DP for the N20?

For N55 ....

 

[Seraphblade]

Re: JB4 for N20 / N26 engines

I managed to find a F30 + N20 chargepipe here
N20 (2.0T) F30 Charge Pipe |

Wow thanks! Something I have been looking for!

 

[nokiaop]

Re: JB4 for N20 / N26 engines

Hihi , sounds gd here . I found the ER downpipe damn nosiy n smelly

 

[Seraphblade]

Re: JB4 for N20 / N26 engines

Hihi , sounds gd here . I found the ER downpipe damn nosiy n smelly

I like the sound, but hated the smell.

Anyway, have u completed ur adaptation runs?

Post ur log here if u can.

 

[hktdc]

Re: JB4 for N20 / N26 engines

Was the dp a lot louder than stock?

 

[nokiaop]

Re: JB4 for N20 / N26 engines

Haven pull 3 times yet ? How long many time ? Feel funny with it sometime

 

[egg2]

Re: JB4 for N20 / N26 engines

Agreed.. I sold my er downpipe because of the smell..
But high flow cats that super expensive. Saw 1 for almost 2k for additional 5-10 horse.
Not worth it until the dme gets cracked so that we can reflash and get more control over the ecu...

+1 on the less smell issue w HFC.
Local exos shops shd be able to de-meow ori ceramic 400-cell ones to replace w 100/200 cell metal core 1's for ~$0.5k. With JB4, CEL is a non-issue. Else a proper ceramic core O2 sensor adaptor is req.
HFC not much sound diff on a day-to-day norm driving.

 

[Seraphblade]

Re: JB4 for N20 / N26 engines

View attachment 58268View attachment 58269View attachment 58270

Some 4th gear pulls.

This was without ER catless DP.

The ign timing looks a bit weird (looks hunting)

 

[Seraphblade]

Re: JB4 for N20 / N26 engines

Anyway, there are some promising (and some must get) mods that is released for the n20s.

An intercooler from wagner tuning. Competition Intercooler Kit BMW F20 F30

Oil Catch Can. BMW Oil Catch Can for BMW 135 335 1M 535 by BMS Best Oil Catch Can