[bmw_hub]

Originally Posted by n55e90

Why does it overboost?

because you're running map 2 without a down pipe, I recommend switching to map 1 and see if that works

[jgoens]

Originally Posted by bmw_hub

very surprised you don't feel the same way as I do, I noticed a nominal increase in power, not to mention I have the BMW PPK (which is proven to add 35hp and 50trq, as opposed to what bmw claims at 20hp and 32trq), and I still noticed a big difference, keep in mind that I do have a charge pipe and bms intake, however that really doesn't add power, perhaps you installed it incorrectly?

I have bmw ppk as well but that is moot since the jb4 basically overrides that..so you do not feel the benefits but you still get the cool burble.I agree the power is pretty good but have to agree it is not as strong at the high rpm's but in real day driving it is hard to really get into it.

[n55e90]

Originally Posted by bmw_hub

because you're running map 2 without a down pipe, I recommend switching to map 1 and see if that works

It was on map 5

[bmw_hub]

Originally Posted by jgoens

I have bmw ppk as well but that is moot since the jb4 basically overrides that..so you do not feel the benefits but you still get the cool burble.I agree the power is pretty good but have to agree it is not as strong at the high rpm's but in real day driving it is hard to really get into it.

yes thats correct jb4 does override the ppk, i shift at 6k anyway as thats the peak hp is at 5800, so not having top end power doesn't bother me, most turbo cars without meth and/or e85 are like that

[bmw_hub]

Originally Posted by n55e90

It was on map 5

I couldn't tell you then honestly

[mike@x-ph.com]

Originally Posted by n55e90

It does get throttle closures sometimes. Why is that?

its either overboost or traction control
Post logs so we can check it out

[n55e90]

How do i post them? I have them as a pic on my phone

[mike@x-ph.com]

Originally Posted by n55e90

How do i post them? I have them as a pic on my phone

You need to upload the csv file to data zap

[n55e90]

[n55e90]

Originally Posted by mike@x-ph.com

its either overboost or traction control
Post logs so we can check it out

Posted a log from map 5 3rd gear pull

[bmw_hub]

Originally Posted by n55e90

Attachment 1276197

looking at the logs, it has to be traction control as there is no cat bounce in boost pressure (excuse the stock market term), compared to throttle. What are the condition of your tires?

[n55e90]

Originally Posted by bmw_hub

looking at the logs, it has to be traction control as there is no cat bounce in boost pressure (excuse the stock market term), compared to throttle. What are the condition of your tires?

It was a 3rd gear pull with traction off and stability control off too. I highly doubt the tires are spining in 3rd gear. They have about 80% tread on them too.

[n55e90]

http://datazap.me/u/goosemann55/2011...a=1-3-4-5-9-18
My datazap from the pull in 3rd gear in this one map 5... 93 Octane

[n55e90]

http://datazap.me/u/goosemann55/e90-...a=1-3-4-5-9-18
Map 2 3rd gear pull....93 octane
shows throttle dropping at 4458 rpm to 84%
Tires are good and road was dry, cant see how it would be traction control coming in at that speed

[mike@x-ph.com]

Originally Posted by n55e90

http://datazap.me/u/goosemann55/e90-...a=1-3-4-5-9-18
Map 2 3rd gear pull....93 octane
shows throttle dropping at 4458 rpm to 84%
Tires are good and road was dry, cant see how it would be traction control coming in at that speed

Throttle closure in that log was caused by overboost.
Target was 14 psi and car was doing 14.5

[n55e90]

Originally Posted by mike@x-ph.com

Throttle closure in that log was caused by overboost.
Target was 14 psi and car was doing 14.5

But in map 5 it didn't overboost. it had way more throttle closure. Why is that? how can i stop it from having throttle closure?

[Mike@N54Tuning.com]

Originally Posted by n55e90

It does get throttle closures sometimes. Why is that?

The S55 like the N55 is a valvetronic motor so it doesn't use the throttle to regulate airflow. It's just a safety valve that follows along load closely ready to close should the DME detect something amiss with the valvetronic system. That's why stock it's normally not sitting at 100% open at full throttle like an N54 would.

Mike

[n55e90]

Originally Posted by Mike@N54Tuning.com

The S55 like the N55 is a valvetronic motor so it doesn't use the throttle to regulate airflow. It's just a safety valve that follows along load closely ready to close should the DME detect something amiss with the valvetronic system. That's why stock it's normally not sitting at 100% open at full throttle like an N54 would.

Mike

so i have to live with the fact that its going to have throttle closures then?

[Mike@N54Tuning.com]

Originally Posted by n55e90

so i have to live with the fact that its going to have throttle closures then?

The stock tuning keeps the throttle very active by design. If it's tuned properly that same behavior will be present.

Mike

[n55e90]

Originally Posted by Mike@N54Tuning.com

The stock tuning keeps the throttle very active by design. If it's tuned properly that same behavior will be present.

Mike

so is my car running like it should on those data logs other than having throttle closures? i feel like its only gained about 20whp. I was expecting a lot more from this jb4.

[mike@x-ph.com]

Originally Posted by n55e90

so is my car running like it should on those data logs other than having throttle closures? i feel like its only gained about 20whp. I was expecting a lot more from this jb4.

Looking at your logs, i would say you are gaining closer to 40 whp
The only way to know for sure would be on a dyno

[n55e90]

Originally Posted by mike@x-ph.com

Looking at your logs, i would say you are gaining closer to 40 whp
The only way to know for sure would be on a dyno

I would be so happy if it gained 40hp