N54/E90 6MT Daily Turned Dedicated Drag Build

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SJ_1989

Sergeant
Aug 7, 2018
259
Illinoisssss
OK I lied.....it's never been my daily but I haven't driven it much in the past 3 years so decided to turn it into a dedicated track car. I needed a hobby anyway lol.

Background
Bought the car in 2012 and went full bolt ons over the next few years. Last year is when I decided to take it the next step further and go single turbo. Now at this point I had no intention on this being a dedicated drag car. It was meant to see a track day every now and then but still beat the piss out of it on the way to cars and coffee or something and not care if it broke. Well, started the single turbo conversion then work got crazy so never finished it and just sat on the lift for 6 months. Fast forward to the present. Had a phone call with a shop that does quite a bit of Time Attack/NASA, etc builds regarding my intentions with the car. We started laying out a plan and well, here I am. I drop the car off in about a month and it'll probably be there for a little over a month getting some things done that I either don't want to do or can't do. Maiden voyage is SCT Joliet, IL in May but we'll see. Scope creep is already happening with this build and I haven't even dropped the car off lol. He's currently working on a badass Time Attack E90 right now. His mentality is either do it right the first time or don't do it at all, and I accept that. Google "WTCC Widebody Time Attack E90" to see what I mean.

Goal for the car is to be a dedicated drag car and take the 6MT as far as possible. MHD for now and possibly standalone in the future. Built motor at some point in the future. Goal weight without me in it is 2700 lbs with the cage. I don't think it's possible with my current weight reduction so I may need to gut the doors, lexan windows, and a few other clever tricks. I think with the right setup 9's is definitely possible, but we'll find out I guess. It's been said this isn't at all possible in a 6MT but I'm going to take a crack at it. I like a good challenge. Will be attending plenty of SCT's this year so we'll see.

You'll probably see a lot more updates on my IG account, but I'll try to keep this thread updated as much as I can.

Mod List
Here's the major stuff worth noting. Doesn't include all the maintenance items I replaced. If I knew when I started the ST conversion that this would turn into a dedicated drag car I would have gone another route with a few items.

Engine/Drivetrain
DocRace 6466
MFactory lightweight flywheel
MFactory 3.08 Helical LSD
Turner Motorsport solid diff mounts
Turner Motorsport solid engine mounts
Turner Motorsport solid transmission mounts
Spec stage 3+ clutch
Custom exhaust
PSP 900 intercooler
Custom chargepipe
Turbosmart BOV
Precision Raceworks coils
Precision Raceworks stage 3+ LPFP
Helix HPFP overdrive
BoostBox
MHD
VTT crank bolt capture
HVAC delete
Power steering delete
WOT Box

Suspension/Brakes/Wheels
Suspension info coming when I figure out what I want. Likely switch to full spherical bearings and custom coilover setup with custom valving


ASD hydraulic e-brake
Tilton 800 Series pedal box and master cylinders
Turner Motorsport wheel studs
17x8.5 ET40 OZ Alleggerita*
Weld S77 17x5 2.2 inch back space
Hoosier 28x10x17 bias ply*
Hoosier 27.5x4.5x17 bias ply front runners
AR Design line lock

Exterior
Headlight delete
Hood exhaust
Aerocatch hood pins
Pinch welds removed in front fenders to clear Hoosier's

Interior
Fully gutted
10 point roll cage
Parachute handle
VAC seat mounts
Sparco steering wheel
Rennline quick release
OMP steering wheel hub adapter
Kirkey series 55 aluminum seat with cover
G-Force camlock 6 point harness
Hard Motorsport sunroof delete
Custom aluminum dash with tablet as main display running MHD
Rear firewall

Pic before I started the ST conversion
20180515_200442.jpg


Bought a car lift and installed it myself just for this build. Hell to the naw was I going to do this on the ground.
20180518_171659.jpg


Sitting pretty. Unfortunately with stripping out the interior my garage doesn't look near this nice anymore :disappointed:. I just moved into this house 3 weeks prior.
20180525_195845.jpg


Came home from work and the DocRace kit was sitting patiently for me. UPS was suppose to leave it in the garage....I was so pissed.
20180626_170115.jpg


All of the parts when I started the build. Things escalated quickly after this.....
20180626_174001.jpg


Nom nom nom nom nom. I've drank lots and lots of brewskies working on this build lol.
IMG_20180628_164551_202.jpg


How she looked as of summer 2018. Honestly, if I new I was going to go dedicated drag car I wouldn't have gone with the DocRace kit. I would have done something custom. For the price of the kit I expected fitment to be a little bit better. The turbo was resting on the shock tower even with new OEM engine mounts. Had to order Turner Motorsports solid mounts which actually raised the engine a few mm. I would have tucked the turbo down in the headlight.
20180722_214905.jpg


Picked up some bias ply front and rears. Waiting on my Weld fronts. It's a 6 week lead time and it's been 6 weeks so should be any day now.
20190107_165557.jpg


20180713_190650.jpg


MFactory LSD. I really ought to do the 8.8 conversion. I'm expecting to snap the stock axles at my first outing since I'll have bias ply's and a suspension setup for drag racing. Also need to do more research matching gear ratio to the engine. I just went with the OEM 3.08. NOTE: Trans mounts are with old poly mounts. Went solid bcracecar.
20181230_133613.jpg


This is when things really started to escalate after my phone call with the shop doing the roll cage :grimacing:
20190210_144335.jpg


20190217_172442.jpg


20190218_222413.jpg


HVAC and windshield wiper motors deleted
20190214_004512.jpg


20190215_014508.jpg


Hard Motorsport sunroof delete panel. Looks like a quality piece. We'll see how it fits and if I can get the dang thing to seal....
20190219_162602.jpg


That's it for now. More to come later.
 
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derekgates

Corporal
Feb 23, 2018
100
NW FL
Wow, this is an incredible amount of tearing down! Looks to be a fun project, that DocRace kit looks sweeeeeeet!

I am interested in how that sunroof delete works out. :)
 
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Abacus38

Lieutenant
Nov 2, 2016
609
Tampa/Orlando, FL
You’re going to have swap the m3 diff or go 8.8. The Ring and pinion on the 335i diff are weak along with the output shaft/flange You’ll snap it like a twig.

335i diff
62D88992-8C4A-4B8B-B69C-5D2566F94B30.jpeg


M3 diff
A0C6810E-9AB6-4E26-879A-221019CBC525.jpeg
 

SJ_1989

Sergeant
Aug 7, 2018
259
Illinoisssss
You’re going to have swap the m3 diff or go 8.8. The Ring and pinion on the 335i diff are weak along with the output shaft/flange You’ll snap it like a twig.
I'm fully expecting it but going to see how far it'll take me. Who knows, if I can sell this one maybe I'll do the swap.
 
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Reactions: Abacus38

Abacus38

Lieutenant
Nov 2, 2016
609
Tampa/Orlando, FL
I blew mine up at the track
I'm fully expecting it but going to see how far it'll take me. Who knows, if I can sell this one maybe I'll do the swap.
Yeah I found out the hard way when i blew mine up at the strip on stock turbos but the good news is that you’re on bias ply so it should last longer. I was on drag radials
 

SJ_1989

Sergeant
Aug 7, 2018
259
Illinoisssss
My intent is to use the hydrobrake to load up the driveline to help as well. I don't know, I'm still torn. Maybe I'll just do the 8.8 instead of the suspension so I know I can put the power to the ground, just not efficiently.
 

135iTX

Specialist
Dec 1, 2017
56
If I recall correctly, the dude in Australia that ran a 9 on a powerglide was using a stock welded rear diff. Those bias ply tires should help eliminate some shock on the drivetrain
 

tisdrew

Corporal
Jun 27, 2017
125
You're running a 10" wide Hoosier on a 8.5" wide wheel? My stock wheels are 8.5" wide...
 

SJ_1989

Sergeant
Aug 7, 2018
259
Illinoisssss
If I recall correctly, the dude in Australia that ran a 9 on a powerglide was using a stock welded rear diff. Those bias ply tires should help eliminate some shock on the drivetrain
Then maybe it'd be alright for a bit. Or at least until MHD releases antilag lol.

This is really awesome. Maybe one day I'll follow and do the same.
Thanks, it's been fun so far. Except removing the wiring harness. That suuuuucked.
 

SJ_1989

Sergeant
Aug 7, 2018
259
Illinoisssss
Have you looked into the front end tube chasis conversion?
Yea, I've had that conversation with the chassis shop but not something I'm doing quite yet. This years goal is to focus on safety and get a solid foundation to go low 10's, and dare I say it, high 9's *don't freak out people*.

TON more updates to come when I drop the car off middle of March at the shop :grimacing:
 

SJ_1989

Sergeant
Aug 7, 2018
259
Illinoisssss
Some more updates....

Deleted the power steering bcracecar.

27048


27049


Installed the PSP 900 intercooler. The J-pipe supplied doesn't appear to work with the VRSF chargepipe or doc race single turbo kit. So I'll have to get something custom made I guess.

27050


Found a killer deal on a 28' enclosed trailer local to me. Dealer has been sitting on it for awhile as trailers like these don't sell quickly in my area. 5200# dexter axles, cabinets, electric jack, 7.5' ceiling, wired for A/C, finished interior, 50 amp panel, etc.

27051


27052
 
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