JB4 (N54/N55) Support Thread, South Africa

[ed_z]

Yep, mine does the same but its loud...:rollsmile:...no cats :=):

Yeah if only the cold start sound would always stay like that warned up even I would be happy! Lol

---

just a question...the n55 jb4 stage 2,there is no g5 board available or does it come with the g5 board preinstalled as its the latest jb4?also if yes,than when uploading firmware does one use the g5 firmware?

I am been asked this question often, so let me give a little bit of an explanation. And since the answer is not on that other forum...:=):

Currently the N55 Jb4 board (is) a G5 advance board albeit different in looks to the N54 G5 board. But there is no G5 firmware out for the N55 Jb4 board. We just have to wait. So N55 owners dont go cutting anything or uploading N54 G5 firmware it aint gonna work.

But the main thing is this. The G5 iso (isolated boost control) is absolutely incredible and takes the Jb4 to a whole new level. And combined with the bms flash is serious business. But N54 owners if your car is not FBO and meth, dont rush into this because you will only really enjoy these benefits if you have the supportive mods. And since the G5 iso goes through revisions on a daily basis its worth waiting until the tuning has stabilised and been completed. However, all new Jb4 tunes for the N54 ships with the G5 board. But there is still no decision if it will ship in (iso) mode...but its an easy modification to do. :thumbs:

I hope this explanation helps a little.

Nicely explained as I know a couple if my friends in the states that did this on there N55's! Oopsie!!!

 

[bybyM3]

Twinz i bit the bullet,

Rb on the way but waiting for my waste gate to give in before i install. I think n54 has a serious problem regarding waste gate issues.

question :

Can i buy the Cobb and share it someone. I know its vin locked for 3 cars. So can you open it for two cars at the same time to load the BMS flash.

#2 : Can you run the flash with stock snails and N20 mac sensor, meaning only change to rb after all of this is installed ?

Please advise.

Oh is there any one who wants share in the cost for a 1000litre E95/5.

Thanks

 

[bybyM3]

Almost forgot. I need a 2 step relay as well please. Please PM me a price.

Are there any disadvantages using the nls system

 

[Twinz]

Hi
Just saw your PM

1. The BMS flash is ideal for RBs...rather wait till you have RBs before installing the flash.

2. The cobb is locked to (one) vin only. You cant share it. Its pretty expensive but the flash takes care of 90% of our fueling issues. The rest is hardware related.

3. The N20 sensor is only valid with RBs or nitrous. No other value on stock applications. You cant boost 21 - 24 psi on stock turbos reliably. The N20 allows you to do that with the RBs.

4. Yes, you must get the 2step. Brilliant for even greater shift gains.

 

[bybyM3]

Hi
Just saw your PM

1. The BMS flash is ideal for RBs...rather wait till you have RBs before installing the flash.

2. The cobb is locked to (one) vin only. You cant share it. Its pretty expensive but the flash takes care of 90% of our fueling issues. The rest is hardware related.

3. The N20 sensor is only valid with RBs or nitrous. No other value on stock applications. You cant boost 21 - 24 psi on stock turbos reliably. The N20 allows you to do that with the RBs.

4. Yes, you must get the 2step. Brilliant for even greater shift gains.

Thanks. Great support always.

Please pm me a price on the relay.

Maybe its time for GAS now. Let me do research first. Risk are heavy but I guess the power is worth it.

 

[bilal04]

Hi
Just saw your PM

1. The BMS flash is ideal for RBs...rather wait till you have RBs before installing the flash.

2. The cobb is locked to (one) vin only. You cant share it. Its pretty expensive but the flash takes care of 90% of our fueling issues. The rest is hardware related.

3. The N20 sensor is only valid with RBs or nitrous. No other value on stock applications. You cant boost 21 - 24 psi on stock turbos reliably. The N20 allows you to do that with the RBs.

4. Yes, you must get the 2step. Brilliant for even greater shift gains.

Thanks. Great support always.

Please pm me a price on the relay.

Maybe its time for GAS now. Let me do research first. Risk are heavy but I guess the power is worth it.

Exciting stuff here! :rollsmile: RBs!

 

[bybyM3]

Hi
Just saw your PM

1. The BMS flash is ideal for RBs...rather wait till you have RBs before installing the flash.

2. The cobb is locked to (one) vin only. You cant share it. Its pretty expensive but the flash takes care of 90% of our fueling issues. The rest is hardware related.

3. The N20 sensor is only valid with RBs or nitrous. No other value on stock applications. You cant boost 21 - 24 psi on stock turbos reliably. The N20 allows you to do that with the RBs.

4. Yes, you must get the 2step. Brilliant for even greater shift gains.

Thanks. Great support always.

Please pm me a price on the relay.

Maybe its time for GAS now. Let me do research first. Risk are heavy but I guess the power is worth it.

Exciting stuff here! :rollsmile: RBs!

R35k boeta, i want to wheel spin in 6th gear hahahahahahahahaha jj

once the speed bug bites, it never stops

 

[bilal04]

Hi
Just saw your PM

1. The BMS flash is ideal for RBs...rather wait till you have RBs before installing the flash.

2. The cobb is locked to (one) vin only. You cant share it. Its pretty expensive but the flash takes care of 90% of our fueling issues. The rest is hardware related.

3. The N20 sensor is only valid with RBs or nitrous. No other value on stock applications. You cant boost 21 - 24 psi on stock turbos reliably. The N20 allows you to do that with the RBs.

4. Yes, you must get the 2step. Brilliant for even greater shift gains.

Thanks. Great support always.

Please pm me a price on the relay.

Maybe its time for GAS now. Let me do research first. Risk are heavy but I guess the power is worth it.

Exciting stuff here! :rollsmile: RBs!

R35k boeta, i want to wheel spin in 6th gear hahahahahahahahaha jj

once the speed bug bites, it never stops

Hahaha wicked man.cant wait to check it with the RBs gona be a monster
Spinning in 6th possible haha

 

[ed_z]

Twinz i bit the bullet,

Rb on the way but waiting for my waste gate to give in before i install. I think n54 has a serious problem regarding waste gate issues.

question :

Can i buy the Cobb and share it someone. I know its vin locked for 3 cars. So can you open it for two cars at the same time to load the BMS flash.

#2 : Can you run the flash with stock snails and N20 mac sensor, meaning only change to rb after all of this is installed ?

Please advise.

Oh is there any one who wants share in the cost for a 1000litre E95/5.

Thanks

Lol mine was delivered today but the 210l drum. 5 liters Toluene, 10l E95 and 35 odd liters 95 pump to fill tank and AWESOME with G5 Iso!!! G4 threw fuel codes the entire time.

 

[bybyM3]

I am paying R9 excl vat a litre is that the going price

 

[Richard H]

That's a very good price

 

[Twinz]

Thats a freaken good price...for e95? Please PM contact.

Rennzport also sells the kit to test the real ethanol content...so you would be able to see if its 85 or 95 or 100% ethanol.We heard of places mixing with water to dilute ethanol content...eish i must still test the kit...so many new stuff arrived we have not had time to put them to the test.

Just as a point of clarification, when we talk of e85 we mean 95 or 100 ethanol...its just the value content that differs but e85 is also 100% ethanol...hope it makes sense. I was meant to start the damn ethanol support thread ages ago...still not having my arse in gear

 

[///Shaun]

.

Just as a point of clarification, when we talk of e85 we mean 95 or 100 ethanol...its just the value content that differs but e85 is also 100% ethanol...hope it makes sense. I was meant to start the damn ethanol support thread ages ago...still not having my arse in gear

1 X foot in rear sent....:lol:

Would be awesome to have a support thread for this mate

:thumbs:

 

[Twinz]

hehe...:thumbs:

 

[bybyM3]

Doc and bilaal always good to chat to. Fellow enthusiast.

Finally got my logs to send to twinz

All I can truly say is JB dominates and with e85 its like an animal. Going to dyno soon. Hoping to get a min of 281wheel KW.

 

[bilal04]

Doc and bilaal always good to chat to. Fellow enthusiast.

Finally got my logs to send to twinz

All I can truly say is JB dominates and with e85 its like an animal. Going to dyno soon. Hoping to get a min of 281wheel KW.

Leka meeting yest, car is sounding lovely!
E85 :rollsmile: I can't wait to see hw she gona run!

 

[DoC1471]

Doc and bilaal always good to chat to. Fellow enthusiast.

Finally got my logs to send to twinz

All I can truly say is JB dominates and with e85 its like an animal. Going to dyno soon. Hoping to get a min of 281wheel KW.

you to Buddy,seriously impressed with your car really,im sure you will get more,and i agree JB dominates completely.

 

[Josh-ZN]

sorry if this is a dof question. i know when you up the boost, you have to have good fuel or meth or both on stock turbos. now with rb turbos surely you will be boosting higher with less effort. does this mean you require hectic cooling or race fuel when you upgrade to rb turbos and run them at full potential? i mean 21psi?? my car would explode and break at that boost :roflol: for everyday use would you merely set them to boost around 12psi?

:flyfun:

 

[Twinz]

With RBs and nitrous you can safely run on 95 pump fuel as a daily drive for example the JB4 Maps 1,2,3,5 would all be fine on pump fuel with the above hardware. This we have tested safely over and over again.

Its when you want to up the boost in the region of 17 - 24psi that you require some fueling aids. Water/meth becomes essential and or 109+ unleaded race fuel and or e85. Or even a combination of these. On the N54/N55 platform you may even require additional fueling hardware such as upgraded LPFP...oil lines etc...(In addition to running FBO, RBs & w/meth). Hardware modding on the JB4 and some JB4 flashtuning are all necessary to consider.

 

[bybyM3]

Good quality fuelis always good. Higher the octane more power you can make no matter the size of the turbo. JB love high octane. E85 allows you the ability to increase your cars octane in an inexpensive manner. This means you can hold higher boost for longer periods of time.

Meth has two effects. The water cools the air temp entering the intake and the meth increases octane. Meth can fill the gaps in your feuling therefore allowing your feul trims to be more consistant. With high ocatne fuel you will have to consistantly watch your trims.

Having said that RBs. With good fuel will allow you to say hold around 19psi in the higher rev range were as with stock snails it will taper out at around 16 psi

With the bms flash and rbs you could expect an additional 20HP in the higher rev range.

One other thing to consider is a better fuel pump. Hpfp to be precise sucks.

Having around 24psi on tap I don't think you would ever want to drive around with 12psi especially with the amount of tuned cars around these days. We always striving to push the boundries and this is just the way the speed drug works. There is no rehab for this drug.