[itschuto]

Okay guys i need alot of help from you guys..
I have a 340, automatic trans, jb+ (running 4.0 PSI over boost), bms billet intake.

I was going home on the freeway and i was messing around, hitting 100 plus. I realized that when i upshift at high speeds, it lags a little. It like jolts, then shifts. Its not smooth at all....

When i got home i popped my hood and i saw my turbo was burning hot red....

I am considering taking my jb+ off, i dont wanna ruin my car...

Any advice people?

[Chicken_Joe]

Reset throttle/tranny adaptation. There should be a thread in here about that. It's. It hard to do at all and takes maybe all of 10 min

[White340]

Do you have any pictures? I have the Dinantronics Sport and am running at +4 psi on my 340. I'm concerned after hearing this..

[NYC_340i]

I have pretty much the same setup and I also experience really bad shift lag with the JB+ anywhere at or above the default 3 o'clock position. However I did not notice my turbo being red even after a few runs down the drag strip.

I currently have it set to the 12 o'clock position and so far I do not notice a shift lag (haven't pushed it yet so I need to try and confirm). If none is present I may try to up the boost to between the 1-3 positions to see what's the max for me.

[itschuto]

Originally Posted by NYC_340i

I have pretty much the same setup and I also experience really bad shift lag with the JB+ anywhere at or above the default 3 o'clock position. However I did not notice my turbo being red even after a few runs down the drag strip.

I currently have it set to the 12 o'clock position and so far I do not notice a shift lag (haven't pushed it yet so I need to try and confirm). If none is present I may try to up the boost to between the 1-3 positions to see what's the max for me.

Originally Posted by NYC_340i

I have pretty much the same setup and I also experience really bad shift lag with the JB+ anywhere at or above the default 3 o'clock position. However I did not notice my turbo being red even after a few runs down the drag strip.

I currently have it set to the 12 o'clock position and so far I do not notice a shift lag (haven't pushed it yet so I need to try and confirm). If none is present I may try to up the boost to between the 1-3 positions to see what's the max for me.

It is on the 3:00 position for me

[itschuto]

Originally Posted by White340

Do you have any pictures? I have the Dinantronics Sport and am running at +4 psi on my 340. I'm concerned after hearing this..

Originally Posted by NYC_340i

I have pretty much the same setup and I also experience really bad shift lag with the JB+ anywhere at or above the default 3 o'clock position. However I did not notice my turbo being red even after a few runs down the drag strip.

I currently have it set to the 12 o'clock position and so far I do not notice a shift lag (haven't pushed it yet so I need to try and confirm). If none is present I may try to up the boost to between the 1-3 positions to see what's the max for me.

No picture but i opened my hood and my engine compartment was glowing red and i looked on the side and saw my turbo and something was smelling funny. I thought my car was going to blow up.

[High Flier]

Check the coolant levels after it cools down to ambient temperature. Look for evidence of fluid leaking around the coolant caps. Did you possibly have a low coolant level for the turbo and are not getting a warning?

[itschuto]

Originally Posted by High Flier

Check the coolant levels after it cools down to ambient temperature. Look for evidence of fluid leaking around the coolant caps. Did you possibly have a low coolant level for the turbo and are not getting a warning?

No leaking, nothing. I set my boost down to about 2 and i drove it hard, the same way, and it wasnt red. I think on 4.0 it was way too much boost going through. Keep in mind i dont have a chargepipe or any of that. I think i was just overworking my turbo

[kern417]

could have been leaning out the afr.

[babyboss]

Jb+ not the way 2 go guys ..
Tried & tested here ..
Total waste of time ..

[XutvJet]

Glowing red turbos after long pulls is pretty normal. If you do a long highway pull, quickly pull over, and it's dark outside, it's not out of the question to see the exhaust side of the turbo glowing. Watch YT videos and you'll see many stock turbo cars do this on the engine dyno. The higher the boost, the more pronounced the glow and rate at which it starts to glow.

As for the upshift lag and then jolt, it seems to be a pretty normal occurrence, especially in cars running JB+ and similar basic piggyback devices. It's very likely the result of the DME and transmission ECU trying to make sense of the extra torque from the increase in boost when the DME "thinks" everything is running as it should (i.e., it's not aware it's trying to push another 4 psi). Try dialing the boost gain back a few notches. It will likely result in better driveability but at the expense of power.

I'd also throw that intake in trash. N55s and B58 motors don't like aftermarket intakes. They tend to cause all sorts of weird issues (lag, idle problems, CELs) and don't gain any meaningful power. It's just an expensive noise maker. If you want more induction noise, buy an extra lower air box and cut some holes in it.

[bsas340i]

I've seen too many members having issues with the JB+. I think you'd be better off spending a bit more money and going into the JB4 or Active-8 tune. I'm not an expert but from what I gather, they monitor many other variables and raise boost accordingly. It seems like the JB+ or Dinan Sport simply raise boost without taking anything else into consideration. If you are able to afford a 340i, you can afford a $600-$700 tune. Better yet, if you want peace of mind, have the Dinantronics stage 1 installed by a BMW dealership. Even though some have also reported issues and no tune is flawless, you should have some sort of comfort with the Dinan warranty.

Best of luck and I hope that was the last time this happens to you!

[goj]

JB+ is not what you want to use if you want smoothest driving experience. In fact no piggyback tune is going to offer stock drivability let alone a boost controller

[itschuto]

Originally Posted by bsas340i

I've seen too many members having issues with the JB+. I think you'd be better off spending a bit more money and going into the JB4 or Active-8 tune. I'm not an expert but from what I gather, they monitor many other variables and raise boost accordingly. It seems like the JB+ or Dinan Sport simply raise boost without taking anything else into consideration. If you are able to afford a 340i, you can afford a $600-$700 tune. Better yet, if you want peace of mind, have the Dinantronics stage 1 installed by a BMW dealership. Even though some have also reported issues and no tune is flawless, you should have some sort of comfort with the Dinan warranty.

Best of luck and I hope that was the last time this happens to you!

How much is the dinantronics stage 1?

[mike@x-ph.com]

JB+ is one of our most popular products, it works great and comes at an unbeatable price.

That being said JB4 will offer better power delivery and a smoother drive.
It also can datalog, so in your case OP you would have posted a datalog and BMS could have checked it to see if everything looks good.

[bsas340i]

They are running Christmas sales right now. Dinantronics Stage 1 used to be $1,400 and it's a little under $1,200 now. Not too shabby.

[mike@x-ph.com]

Originally Posted by bsas340i

They are running Christmas sales right now. Dinantronics Stage 1 used to be $1,400 and it's a little under $1,200 now. Not too shabby.

We are running the same deal + Free shipping

[bsas340i]

Originally Posted by mike@x-ph.com

We are running the same deal + Free shipping

Can't go wrong!

[Mr Carrots]

Dinan isn't going to give you much, if anything over the JB+ - you need a JB4 but as another poster pointed out you can't expect stock drive-ability out of a piggyback, we need to wait for a flash

[bsas340i]

JB4 will have more options and power but the OP's title is "I'm worried, help" while expressing concern about ruining his car. That's why I suggested going the Dinan route. Having a Dinantronics tune installed by a BMW dealership will have (or should have) warranty backing instead of a JB4 tune installed in his garage. This will at least give him a smoother power delivery, increasing HP and torque versus the stock setup while having a little peace of mind that if anything were to happen related to the tune, Dinan will take care of it.

I think of it this way, if your tuned car all of a sudden starts running funky and you see a CEL on the dash. Having which tune will make you "less nervous" going into the dealership?

Doesn't mean that he might be unhappy with the JB4, we know that it's a much better option than the JB+.

Let us know what you end up doing

[itschuto]

Originally Posted by bsas340i

JB4 will have more options and power but the OP's title is "I'm worried, help" while expressing concern about ruining his car. That's why I suggested going the Dinan route. Having a Dinantronics tune installed by a BMW dealership will have (or should have) warranty backing instead of a JB4 tune installed in his garage. This will at least give him a smoother power delivery, increasing HP and torque versus the stock setup while having a little peace of mind that if anything were to happen related to the tune, Dinan will take care of it.

I think of it this way, if your tuned car all of a sudden starts running funky and you see a CEL on the dash. Having which tune will make you "less nervous" going into the dealership?

Doesn't mean that he might be unhappy with the JB4, we know that it's a much better option than the JB+.

Let us know what you end up doing

Im thinking about selling this and getting a dinan sport.. the whole bluetooth thing is appealing to me because for this JB+ i have to open my hood and play with that knob to turn the boost down. With the dinan i can apparently do it from the app.. what do you guys think?

[bsas340i]

Dinan Sport does not have warranty. I think you'll be in the same spot as JB+ since they are pretty much the same thing: boost controllers. Go for the Dinantronics if you want the warranty and no headaches. If you just want power and a higher quality piggyback, go with JB4 or Active-8.