Derek's E90: ///M3 Sedan Journal

[derbo]

Thanks guys!

Mineral Gray is an amazing color. Pre-LCI production numbers show it is the lower take in exterior color with Long beach being the highest.

I love my E90M but the F87M advancement in technology is insane. The car did not come with AppleCarplay from factory but since this car runs iDrive6.0, I was able to log into the Connected Store and just select it, pay for the option, and then boom its available and ready to go with Wireless Carplay! The F87 feels like an E46M3 sized car with factory heavily modified N55 motor and DCT. I really like boost and the Active Sound Design sounds pretty amazing. I can't wait to start fiddling with E-SYS and messing with the parameters to do all the fun coding we all love to do on BMWs.

We are a double-income children-less couple so it's fun! E90M3 is more "practical" but with a terrible MPG compared to the F87's ~30mpg highway.

Pricing
A good E90M3 LCI 6MT now commands premiums between 34k-45k depending on absurdness and who is selling the rarity. With only 1055 LCI 6MT, it will be hard to find a nice one for cheap. DCT ones are not as rare but still rare compared to the E92/E93s.

2018MY LCI F87 is around $60k but all the dealerships near us are pushing $10K markup. So far production has about 4k units for Pre-LCI and I'm not sure how many they are making for LCI.


Back to E90M!

##Update
I made a decision to buy PS4S tires 275/35/18 as Tirerack just recieved their 18" sizes. My lugnuts, spacers have arrived and I'm waiting on my BBS red center caps to arrive as well.

[704sw]

Please let us know what you think about the PS4S when you get them! My PSS have been driven on a poor alignment, and I have an HPDE this spring on a notoriously-rough-on-tires track. Thus, tires might be coming soon.

[derbo]

Please let us know what you think about the PS4S when you get them! My PSS have been driven on a poor alignment, and I have an HPDE this spring on a notoriously-rough-on-tires track. Thus, tires might be coming soon.

I will as soon as my wallet fattens up again before a purchase.

[slater]

I will as soon as my wallet fattens up again

I have yet to experience this phenomenon.


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[Sockethead]

My wallet flattens up

[slater]

My wallet flattens up

hahahaha.... i like that.

[cakM3]

I will as soon as my wallet fattens up again before a purchase.

Derek, I say this every time I look at my ///M or Porsche...

[derbo]

Derek, I say this every time I look at my ///M or Porsche...

Tell me about it..

I'm ready to do my BBS rims soon!

Spacer Specs:
15mm Front
18mm Rear

Final Specs
18x10 +25 front
18x10 +22 Rear
275/35/18 PS4S

On another note, I just received my BBS Caps from IND today!




Last bits to do:

• Unplugg the TPMS module and code in FTM monitor flats indirectly.
• Buy Tires and get them mounted
• Install the wheel studs/spacers

[johnrando]

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[derbo]

# BBS GT4 RE Installation Day
Today is GT4 install day! After finally caving and buying tires on Tuesday, it's time to install them!

## Goal for Today

• Install Apex 90mm wheel studs
• Install Apex 15/18mm Spacers
• Install BBS GT4 REs w/ 275/35/18 Michelin PS4S
• Remove TPMS (Tire Pressure Sensor) or referred as RDC
• Code in FTM (Flat Tire Monitor) or referred as RPA

## Coding
The BBS GT4s use 8mm valve-stems instead of the factory BMW 11mm valve-stems. For those who wish to retain TPMS sensors, there is an option here: https://www.tpms.com/BBS_wheel_TPMS_...4_p/bbsrdv.htm I personally didn't want to spend the extra money for this and second set of sensors. I figured the economical decision is to ditch the whole wheel sensors altogether and revert back to the Euro E9x/Pre-LCI E9x FTM system.

FTM = It uses the speed sensors in each wheel and compares rotational speeds to check if there is a differential between wheels. This will determine if there is a flat if there is a large deviation. The con is if there is a decrease in tire pressure across ALL tires due to not checking, it will not detect that. (ie. All tires drop to 29psi instead of set 33psi)

TPMS = This uses sensors in the wheels and connects to a main RDC unit in the passenger rear wheel well (at least for LCI E90 2010+). This system is more accurate but can get costly with extra sensors when multiple sets of rims or in my case, racing rims that were not designed for TPMS.

During my research, I found a thread that describing exactly what I wanted to do! http://e84.xbimmers.com/forums/showthread.php?t=1145078 Thanks @improvius for documenting this awesome finding!

The first step is to take off the rear right wheel and undo the inner fender liner. After that, I unplugged the RDC module which is in the lowest rearmost area of the fender liner. Next up, coding!

### NCSExpert changes

• Remove $2VB vehicle order
• Add $265 vehicle order
• FA Write to the CAS module
• Either code defaults to CAS, KOMBI, DSC, CIC or add the following code to the corresponding module:

CIC: RPA_CIC
aktiv
CIC: RDC
nicht_aktiv
CIC: RDC_SAFETY
nicht_aktiv
KOMBI: RDC_ALIVE
nicht_aktiv
KOMBI: MMI_ENA_RPA_RDC
aktiv
KOMBI: RDC_VERBAUT
nicht_aktiv
KOMBI: DSC_MIT_RPA_CC
aktiv
KOMBI: RDC_DISP_SWITCH
nicht_aktiv
MK60_M3: RPA
aktiv

CIC module now shows FTM instead of TPMS!


## Installation
A small storm as passed through San Francisco and today had a slight 50% chance of rain mid-day. Luckily the driveway wasn't too bad.




Off comes the 219M wheels! The PSS tires only have about 3k miles on them so they are looking sharp!


My cousin's 328i E90 in the background just happens to be on GT4s too


My brother's Msport 11 E90 335d, Cousin's 08 328i and my 11 E90 M3.


Installed!


After I reset and initialized the FTM, I drove around it now shows active instead of FTM malfunction!


Few more pics:



## Impressions
Final Specs:

• Front: 18x10+25 275/35/18 Michelin PS4S
• Rear: 18x10+22 275/35/18 Michelin PS4S

The rear looks like it has room for a 20mm spacer instead of an 18mm. The front is perfect with the 15mm spacer. For now, I'll leave it as is. I didn't get to drive it more as I had some errands to take care of. Back into the garage, it goes!

Initial impression of the square setup is that the steering is a bit looser but I will check more the next time I drive it. I'm now itching to lower it... YIKES.

Thanks for reading!