Build Thread...Project M4 GTS: Alpine White

[JustAnothaM4]

Hey Guys...decided to start a build page for my AW M4 GTS.

More info can be found here: https://f80.bimmerpost.com/forums/sh....php?t=1905570

IG: JustAnothaM4

Current Pics:












Project AW M4 GTS: Build Specs

Exterior
* Motorsport24 GTR Carbon Fiber Vented Hood
* Varis Japan Carbon Fiber Rear DIffuser
* Flossmann Carbon Fiber Vented Fenders
* IND Rear Wing Risers
* OEM M240IR Carbon Fiber Wing Endplates
* OEM Euro IKON LED Headlights
* OEM BMW Performance CF Mirror Caps
* IND Alpine White Front Reflector Delete
* SLON Carbon Fiber Upper Tie Bar
* SLON Carbon Fiber front bumper support brace
* Downstar Gold Titanium Billet Dress Up Hardware

Interior
* AIM MXG 1.2 Strada
* KMP Drivetrain Steering Wheel DCT
* Recaro Profi SPG XL Seats
* Brey Krause w/OEM Manual Sliders
* Schroth Enduro 6pt Racing Harnesses
* OEM ’18+ Touchscreen Display
* OEM M Performance Carbon Fiber eBrake Handle
* OEM M Performance Carbon Fiber DCT Knob
* OEM M Performance Carbon Fiber DCT Trim

Suspension & Chassis
* Ohlins TTX Pro w/ Swift Springs (True Rear Coilover)
* Vorshlag Camber Plates
* KMP Drivetrain Diff Kit
* Hotchkis GT4 F&R Swaybars
* Fall-Line front Monoball Spherical Bearings
* Fall-Line Camber Shim Kit
* Fall- Line Adjustable Race Toe Arms
* Fall-Line Rear Lower Control Arm Bearings
* Fall-Line Rear Inner Control Arm Bearings
* Fall-Line Rear End Links
* Individual Racing parts rear lower control arms (perch delete)
* SPL Front End Links
* SPL Front Lower Control arms
* SPL Front Tie Rods
* SPL Rear Upper Arms
* SPL Rear Traction Links

Brakes
* AP Team Schirmer Front Radi-CAL Pro5000R
* AP Essex Rear Radi-CAL Pro5000R
* Spiegler Brake Lines
* PFC 39 Front & 13 Rear Race Pads
* PFC 10 Z-Rated Street Pads

Wheels
* MSI Stud Conversion - 80mm
* BBS E88 Gold SlicerSpec 18x10.5 & 18x11.5
* BBS RI-A 18x11
* Toyo R888R 295/30 & 315/30
* Toyo Proxes RR 295/30 & 315/30

Performance
* MHD Software w/ Custom tuning for single turbo kit
* XHP Flash Tool
* SSR 4pin Crank Hub
* 4N Motorsports GT Single Turbo Kit
* 4N Motorsports 3.5" Titanium Mid-pipe
* Akrapovic Titanium Exhaust
* BP Engineering Titanium J-Pipe
* Turner Motorsports Catch Can
* Precision Raceworks Stage 3 Brushless LPFP
* Dorch Engineering S55 Lift Kit (HPFP Vacuum Pump)
* Nexsys Motorsport S55 Ignition Coil Upgrade Kit w/ B58 Coils
* NGK Spark Plugs
* Mosselman Oil Thermostat
* Wagner Top Mount Intercooler
* C&R / PWR Racing Lightweight Oil Cooler
* C&R Auxiliary Right Radiator (Intercooler)
* C&R Auxiliary Left Radiator (Intercooler)
* CSF Heat Exchanger
* CSF DCT Oil Cooler
* Fall-Line DCT Ultimate Cooling Kit
* BimmerWorld "Oil Overfill Kit"
* BimmerWorld DCT Quick-Overfill Kit
* BMW Motorsport M4 GT4 Motor Mount Inserts
* Rogue Engineering Tranmission Mounts 80A

[SYT_Shadow]

Super excited! Hopefully we meet one day at VIR!

[JustAnothaM4]

Originally Posted by SYT_Shadow

Super excited! Hopefully we meet one day at VIR!

Hell yeah...I haven't been to VIR since my E46 M3 track days. I'll make that drive up from ATL one weekend.

[schnell325]

Oh daaamn. That’s impressive

[Lienrocs]

Nice build! I'm curious to see how the 315/30 works with the e-diff on track!

[JustAnothaM4]

Originally Posted by Lienrocs

Nice build! I'm curious to see how the 315/30 works with the e-diff on track!

No issues at all running the AR1 315/30 which run slightly narrow for its size.

[SYT_Shadow]

You have the euro lci lights, but the GTS doesn't have a Kafas camera so you don't get to use all the cool features like intelligent light assist etc. Did you try retrofitting them as well or are the ikon lights purely for aesthetics?

[JustAnothaM4]

Originally Posted by SYT_Shadow

You have the euro lci lights, but the GTS doesn't have a Kafas camera so you don't get to use all the cool features like intelligent light assist etc. Did you try retrofitting them as well or are the ikon lights purely for aesthetics?

No, I didn't try to retrofit the cameras. As of right now it's for aesthetics.

[schnell325]

Do you have a tune at all? Just wondering how you're dealing with the potential CEL of the DP's

[JustAnothaM4]

Originally Posted by schnell325

Do you have a tune at all? Just wondering how you're dealing with the potential CEL of the DP's

No tune at all. I had O2 sensor spacers since I installed the DPs but, they finally gave out and reporting a CEL.

[schnell325]

[SYT_Shadow]

Sucks to hear. Have you tried the O2 spacers with mini cats inside?

[JustAnothaM4]

Originally Posted by SYT_Shadow

Sucks to hear. Have you tried the O2 spacers with mini cats inside?

Nah...I'm not even worried about it anymore. Once my single turbo kit arrives then I will need tuning done anyways.

[SYT_Shadow]

Originally Posted by JustAnothaM4

Nah...I'm not even worried about it anymore. Once my single turbo kit arrives then I will need tuning done anyways.

you're not getting one of the tried and proven dual turbo replacements? Chet has a cool single turbo build but he doesn't recommend it for most people

[JustAnothaM4]

Originally Posted by SYT_Shadow

you're not getting one of the tried and proven dual turbo replacements? Chet has a cool single turbo build but he doesn't recommend it for most people

No, I want to do something different and willing to take the risk and dive in. The sound from a true equal length manifold and downpipe combo from a single turbo setup is > than any dual setup IMO. There is an external wastegate which can be controlled via Motiv Reflex+ or an old school external boost controller. Tuning is also key for a track car to make sure power delivery is linear. Spool time with my setup will be similar to any larger dual setup hitting full boost by 3500 rpm or maybe sooner. TONS more top end as well.

I'll be the crazy one to do this on a GTS. No shame in my game and fully committed to the process.

Track Car w/ Single Turbo Kit:

[JustAnothaM4]

Sneak peak pics from the single turbo kit.

My Setup will be optimal for track days:
Custom tuning for street and track
Additional Fueling via PI w/ upgraded fuel pump
e85 flex fuel mix
Carbon Kevlar Turbo Blanket
Exhaust manifold heat plate
Ceramic coated exhaust manifold and DP
Front mount intake filter for lower IATs.

[SYT_Shadow]

Very interesting. Who is doing the tuning? Do you expect to find E85 at the track or will it also be tuned for 93/100?

Seems like you're going all in! Congratulations!

[JustAnothaM4]

Originally Posted by SYT_Shadow

Very interesting. Who is doing the tuning? Do you expect to find E85 at the track or will it also be tuned for 93/100?

Seems like you're going all in! Congratulations!

No, I don't expect to find e85 near my home tracks. However, tuning will adjust on the fly depending on fuel mix. I will have a dedicated tune for track running 93-110.

It should be an interesting build.

[SYT_Shadow]

It seems very interesting! Looking forward to hearing more.

In the manifold I see two exits but only one turbo. Is it a twin scroll? Who makes this kit?

Have you considered the lift kit + lpfp + eu5 injectors so you don't have to do PI? PI has its advantages, but your engine isn't built (yet... lol) and PI adds complexity to the system. For a track car that complexity would worry me

[JustAnothaM4]

Originally Posted by SYT_Shadow

It seems very interesting! Looking forward to hearing more.

In the manifold I see two exits but only one turbo. Is it a twin scroll? Who makes this kit?

Have you considered the lift kit + lpfp + eu5 injectors so you don't have to do PI? PI has its advantages, but your engine isn't built (yet... lol) and PI adds complexity to the system. For a track car that complexity would worry me

Yes, its twin scroll. If you look at the turbo it has the same matching two exits.

Yes, I actually might do the lift kit + lpfp + eu5 injectors to keep it simple before diving down the PI lane. Those EU5 injectors have a crap ton of tuning tables that need to be adjusted which can be tricky. Agreed on not implementing any more complexity.

[SYT_Shadow]

Originally Posted by JustAnothaM4

Yes, its twin scroll. If you look at the turbo it has the same matching two exits.

Yes, I actually might do the lift kit + lpfp + eu5 injectors to keep it simple before diving down the PI lane. Those EU5 injectors have a crap ton of tuning tables that need to be adjusted which can be tricky. Agreed on not implementing any more complexity.

meth/PI etc sound great but at the track even OEM systems fail. Having a bunch of extra piping, wiring splices etc sounds ok for 'mexico runs' but at the track... ugh.

lift+lpfp+eu5 is becoming a standard-ish setup and on 93/100 you cannot max that out on a stock block. You probably need zero fueling upgrades for a stock block to hold ~600whp

Do you feel like you've identified a tuner who can tune your car for track work appropriately without disabling safeties, removing knock detection etc? This is by far my biggest concern with any tuning. My E9X experience has been sobering.

Friends have Stg2 tunes from very well known tuners here who fall flat on their face at the track because they're designed for mexico races, not the track. They are two completely different things.

[JustAnothaM4]

Yeah...I might just call it a day with lift+lpfp+eu5 as it just works and can handle all my fueling needs.

Yes, I've been eyeing Wedge Engineering and Motiv for tuning for track work. Wedge already tuned the track car in the video I posted above.