JB4 Stage 3 135i N54 Build Thread

[Chavoos]

Mine did 240wkw 520nm with similar mods in Dec . But I decatted the original DP and have a back end flash.

Did u run in map 5 . It's apparently an unfriendly dyno map.


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[Mr Green]

What is a back end flash?

 

[Nicbyte]

Ya ran on map 5 guys..Kish pm me your e-mail and I'll send through some logs..keep in mind this was on our Cat piss 95.

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Also haven't done backend pump flash..sounds like that will be a good idea?

 

[Chavoos]

BMS developed backend flash maps for use with the JB4 piggyback to meet the higher power requirements and to allow for proper fueling VANOS remapping, ignition advance etc and the JB still maintains functionality and controls boost.

There is a detailed thread by an expert : Twinz on the fanatics forum. Search for it

Also check www.n54tech.com


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[Nicbyte]

The car is boosting on target, sometimes overboosting even. I think there is a ign retardation though. But then again im an IT guy what do I know..[SMILING FACE WITH OPEN MOUTH]

 

[SKYF]

Power is very low
My n55 with jb4 ONLY, pump fuel made 249wkw & 492nm.

Something is def wrong the car.

 

[Nicbyte]

Power is very low
My n55 with jb4 ONLY, pump fuel made 249wkw & 492nm.

Something is def wrong the car.

Seems like I have a boost leak somewhere...:thumbdo::yuck:

 

[tcal69]

oh shame... hope you get sorted out soon:thumbs:

 

[FiRi@Rennzport]

Power is very low
My n55 with jb4 ONLY, pump fuel made 249wkw & 492nm.

Something is def wrong the car.

Please don't say FF30....

 

[Nicbyte]

Power is very low
My n55 with jb4 ONLY, pump fuel made 249wkw & 492nm.

Something is def wrong the car.

Please don't say FF30....

Lol yap, 30FF:thumbdo:
:argh:

 

[Nicbyte]

Soooooo, we did a firmware update and I'm happy to say the car woke up. No more issues waste-gate rattle soma gone. Car is a completely different mental beast now. I can feel a huuuuuuuuuuuge difference. Cant wait to get her on the rollers. I think she has just woken up now...:inlove::joy:

 

[Rommies]

Power is very low
My n55 with jb4 ONLY, pump fuel made 249wkw & 492nm.

Something is def wrong the car.

Please don't say FF30....

Lol yap, 30FF:thumbdo:
:argh:

Was this firmware error?

Glad your cabby is sorted :thumbs::thumbs::thumbs:

Go dyno and see the difference :rollsmile:

 

[Nicbyte]

Power is very low
My n55 with jb4 ONLY, pump fuel made 249wkw & 492nm.

Something is def wrong the car.

Please don't say FF30....

Lol yap, 30FF:thumbdo:
:argh:

Was this firmware error?

Glad your cabby is sorted :thumbs::thumbs::thumbs:

Go dyno and see the difference :rollsmile:

Shot Rommies, cant wait to get her on the dyno. She did 246wkw in that state she was in I really wonder what this beast is doing now. I'm feeling a 280ish...:blab:

 

[Magneto]

Time for a rerun with that Megane.

 

[Rommies]

wow 280wkw :fishwack: im guessing around 260-270wkw and 600nm mark.

also check the smoothness of the power :thumbs::thumbs::thumbs:

 

[Nicbyte]

wow 280wkw :fishwack: im guessing around 260-270wkw and 600nm mark.

also check the smoothness of the power :thumbs::thumbs::thumbs:

I might be over-estimating but she did 246wkw and the difference between then and now is quite tremendous. She does feel more linear now too if that makes sense. Guess all will be revealed on Saturday when I can get her on the rollers again. She does scare me a little now...:blab::joy:

 

[Magneto]

Actually forget the Megane, have a go at Rommies' beast

 

[Nicbyte]

Actually forget the Megane, have a go at Rommies' beast

Lol maybe one day when i'm big...:fencelook::=):
The car is still far from complete..

 

[newoob]

any update - did you redo the dyno?

 

[Nicbyte]

any update - did you redo the dyno?

No not yet been a bit busy, the Car did a 13.6 at Tarlton on Friday night and managed to beat a 2014 C63 AMG ed507 and Supra. So I am happy with the results, Me and Burg share the same guesstimate on power at +/- 280wkw. She is holding boost properly now 15PSI at 3000rpm through to 20PSI 6000rpm 3rd...Then when 4th comes, she still spins a bit.. :biglol: