[AmuroRay]

Originally Posted by 5w20

Here are two logs comparing "exhaust changes". I don't think there's much to gain, but I could be wrong. I'm sure there's maybe 2-5whp difference compared to my race setup or even a nice catback exhaust. I do it for the weight savings that can be had, which is roughly 45lbs. No software or hardware changes besides the exhaust itself.

F32 435i
N55 (stock turbo - ewg)
stock air box non mppk (not cut) w/drop in K&N
CTS inlet
MAD race intercooler
MAD charge pipe
VRSF catless downpipe
Dorch stg1 HPFP
Turbosmart Diverter/BOV
xHP stg3
BM3 stg 2+ E30 - MAP #1 on MuliMap stage 2+ v1.3
(50/50 blend of 93 and E85 - FF sensor on stand by because its too damn hot lol)





(07-02-2022)
The two below are with the completely stock exhaust after the downpipe.

https://www.bootmod3.net/log?id=64a2...90c6cc82292971

https://www.bootmod3.net/log?id=64a2...729bb107d7789a




(08-01-2022)
These next three are with the modified exhaust that I put together that is made to dump at the rear of the transmission. Full 3" piping and turndown.

https://www.bootmod3.net/log?id=64c9...90c63af3f5034f

https://www.bootmod3.net/log?id=64c9...729b9462c48a7b

https://www.bootmod3.net/log?id=64c9...729b9746393fd7

AmuroRay

According to the logs, you're making more power with the stock exhaust.

Look at the measured torque (Torque at clutch actual)

Pre log selected: https://www.bootmod3.net/log?id=64a2...90c6cc82292971
Post log selected: https://www.bootmod3.net/log?id=64c9...729b9462c48a7b

RPM| Measured Torque Pre | Measured Torque Post
5000| 555 |
5100| 544.9 | 528.7
5200| 539.5 |
5300| 532.7 | 511.2
5400| 527.2 | 502.6
5500| 524.2 |
5600| 520.1 | 498.2

Also, for the love of cars - please At least cut that airbox. Your WGDC is crazy high...
Edit:

Looked again, while you lost power, your WGDC went down as well.



RPM| Boost and WGDC Pre | Boost and WGDC Post
5000| 20.4/94%|
5100| 20.1/95% | 20.2/93%
5200| 20.1/95% |
5300| 19.9/97%| 19.8/95%
5400| 19.8/98% | 19.7/95%
5500| 20/98% |
5600| 20/96% | 19.5/97%






Try plugging it in to VD and seeing what it says?