[barchetta]

Question about the potential fuel cap error Im seeing reported here.

I would presume this is a tell tale sign for BMW to recognize potential tampering.

Anyone know if this is scanned for automatically when brought in for service?

[Mike@N54Tuning.com]

Originally Posted by Mamyf30

How does adjusting the boost affect the transmission shifts? It seems like there are several people with laggy transmissions after installing this

If you are running too hot for octane / weather / mods there could be some issues. You can always dial down. Default settings should generally be problem free.

Mike

[riskmaker76]

Your losing too much timing to support the boost and octane... I would start low and work your way up instead..

Originally Posted by babyboss

had it on Default - 3pm
now on Max ..

both settings seem to be closing throttle ..
on the dyno it made 253 wkw 474nm with jb+
removed unit - let car cool down - made 251wkw 480nm

gona try drop it to 50% & see if it works better ..

[riskmaker76]

May or may not.. with my JB4 I have 0 tranny issues except when I run Absolute targets without the EWG wires... But thats another discussion...

JB+ does not take into account many factors... Put the tranny in sport mode... should be better.

Originally Posted by Mamyf30

How does adjusting the boost affect the transmission shifts? It seems like there are several people with laggy transmissions after installing this

[riskmaker76]

Fuel Cap is BS unless your running too much E85 and/or pushing more than 400 HP...

Everyone keeps calling it the Fuel Cap.. they can only wish they hit it...

What your seeing are people with throttle closures that blame the fuel cap...
TC are due to many factors the major one are those with a Catless DP... Its an unfortunate by product of the computer not being able to manage boost well without sufficient backpressure...

Everyone else who gets it is because of poor octane, too much E85, or simple wheel spin and TC kicking in.

Put a BigBoost turbo on, plus all the other mods, plus E85 - yes you will hit it..

Stock cars with JB4 up to Map3 will NOT hit it...

JB+ I doubt you will ever hit it... so dont worry about the cap... Worry more about getting good octane for the ECU to have a higher base boost target and maintain good timing...


PS - the only time the service center will see something is if you throw a code. The moment that happens its recorded.... (ie Overboost, Low Fuel Pressure, etc.)

Originally Posted by barchetta

Question about the potential fuel cap error Im seeing reported here.

I would presume this is a tell tale sign for BMW to recognize potential tampering.

Anyone know if this is scanned for automatically when brought in for service?

[Mike@N54Tuning.com]

Originally Posted by riskmaker76

JB+ I doubt you will ever hit it... so dont worry about the cap... Worry more about getting good octane for the ECU to have a higher base boost target and maintain good timing...

+2

[Mamyf30]

Why does the JB+ have only one connector and the Dinan Sport have two? What's the difference??

[babyboss]

Originally Posted by AlexM240i

Not a good result. How do you feel the car shifting ?? Does it change gears fast or with some delay ?

Def not smooth as before & delayed changes like a old bmw g/box ..

Whts even mor a pain is BMS - Arno won't even return my mails for a refund or upgrade ..

[babyboss]

My local tuner said u can't fool these new cars with jus 1 connection ..

[Mike@N54Tuning.com]

Originally Posted by babyboss

Def not smooth as before & delayed changes like a old bmw g/box ..

Whts even mor a pain is BMS - Arno won't even return my mails for a refund or upgrade ..

Adjust the dial as needed. If it's still doing it at 0% on the dial, then maybe an issue with the box itself. Most likely you have an octane issue though.

Upgrading to the JB4 is easy. Just order the JB4 from BMS' and they allow you to send the JB+ back for credit after.

Mike

[moff]

Originally Posted by NISFAN

Any ideas on what setting to use on an M240i ???? I assume the stock M240i boost is a little higher than stock 3/440i ??? I've heard the M240i comes standard with MPPSK style tune, but I'm not convinced. MPPSK cars seem to dyno at another 20-25hp over M240i.

The JB+ shipped with the pot set to 3 o'clock. I turned it down to 10 o'clock initially. Didn't seem to make much difference, although I swear it cracks more on gear changes ???

Now set to 2 o'clock ready for my next drive. My reckoning is each position equals 0.56 psi, so now at an additive of 3.375 psi. Don't want to overdo it and bring on CEL.

EDIT: UPDATE: Tested 2 o'clock position. Working well, no lights or warnings that I can see.

Hey, how's the JB+ going with your car?

Curious as I have a 440 with MPPSK and I've been considering what to do to eek out some more power. Current thoughts are JB+, JB4 (don't like the install) or Rebellion Automotive chip.

I've used JB+ previously on a 135i and liked the simple install / uninstall.

[NISFAN]

Originally Posted by moff

Hey, how's the JB+ going with your car?

Curious as I have a 440 with MPPSK and I've been considering what to do to eek out some more power. Current thoughts are JB+, JB4 (don't like the install) or Rebellion Automotive chip.

I've used JB+ previously on a 135i and liked the simple install / uninstall.

Yes, it's working well.

I've set it on the default 3 o clock position, and ran 392hp at the fly, or 330 at the wheels at Surrey rolling road. Biggest kick is the torque though, so the increase in power doesn't tell the full story.
There were a number of MPPSK cars at SRR on the day, and mine was a good 20hp up. Not bad for the money.

[babyboss]

Did som drag testing on my ppk 440i with jb+ ..
3pm setting ..

1/4m times - 13.81
Removed unit did som quik high rpm drive for nee adaption ..
Car ran a Best of 12.88

So on my side Jb+ - not the way to go ..

[babyboss]

Originally Posted by Mike@N54Tuning.com

Adjust the dial as needed. If it's still doing it at 0% on the dial, then maybe an issue with the box itself. Most likely you have an octane issue though.

Upgrading to the JB4 is easy. Just order the JB4 from BMS' and they allow you to send the JB+ back for credit after.

Mike

Arno @ BMS not returning my dealer emails for refund/jb4 !!

[Mike@N54Tuning.com]

Originally Posted by babyboss

Arno @ BMS not returning my dealer emails for refund/jb4 !!

Ando? If you have a BMS dealer account you should know how to get in contact with them. Their email addresses are right on their website.

They usually respond within a few hours.

Mike

[jopa489]

After about 3 months, I am happy with the B58/JB+ and BMS intake overall. I just put it through an SCCA track night event (JB+ at max) with zero issues and 80 degree ambient temps. I will probably upgrade to the JB4 as I add bolt-ons and supporting mods, but for the price and ease on an otherwise stock car, the JB+ is great.

[mike@x-ph.com]

Originally Posted by jopa489

After about 3 months, I am happy with the B58/JB+ and BMS intake overall. I just put it through an SCCA track night event (JB+ at max) with zero issues and 80 degree ambient temps. I will probably upgrade to the JB4 as I add bolt-ons and supporting mods, but for the price and ease on an otherwise stock car, the JB+ is great.

Awesome

[riskmaker76]

Try backing off some - sometimes it's just too much boost for the fuel quality + temps...

I found with my JB4 less is more...

But honestly it changes day to day which sucks about this platform..

Originally Posted by babyboss

Did som drag testing on my ppk 440i with jb+ ..
3pm setting ..

1/4m times - 13.81
Removed unit did som quik high rpm drive for nee adaption ..
Car ran a Best of 12.88

So on my side Jb+ - not the way to go ..

[babyboss]

Originally Posted by riskmaker76

Has this been tested with mppsk?

My ppk car ran slower than stock with this unit on my 440i ..

14.0 / 13.8 with jb+

Removed unit did a few high rpm runs fir adaption &

13.1 / 12.8 with ppk only

So sadly my side it did not work ..

[Mike@N54Tuning.com]

Originally Posted by riskmaker76

Try backing off some - sometimes it's just too much boost for the fuel quality + temps...

I found with my JB4 less is more...

But honestly it changes day to day which sucks about this platform..

That is good advice.. Sometimes maxing boost make you slower.. Its a combination of many different factors and boost is only one of them. More boost doesn't always equal more power..

Mike

[phorge]

For the B48 owners...

https://f30.bimmerpost.com/forums/sh....php?t=1653437