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06-07-2023, 09:48 PM | #1 |
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Underwatervans HPDE 128i Buld
Hey folks! Wanted to start my build thread here to document after seeing everyone taking their 128s to the track!
Back story - Been a BMW fan for ever. School/Life/School/City_Life all got in the way of owning one! I had an e28 M5 and blew the engine back a decade ago, and really loved the feel, smell, and look of it. So I've been pining for a literal decade to jump back into the BMW world. A trip to Munich and the BMW this past fall just added fresh kindling... After an extensive search on a pretty modest budget, looked over e36s (m3, 328, 325), e46 (330), and the e82. I needed a backseat, otherwise, I think I'd have held out for a Z4 coupe. Every e36 I saw had fatal flaws, the e46s, were rusted to hell and way to expensive. One day I saw a high milage 128i 6 speed non-sport pop-up. Did my due diligence, read all the forums ect ect ect. Said fuck it and forked over 6k knowing that I'd be replacing everything anyway. The goal of this build will be to prep it for HPDE, autocross first, and then advance further with track time if I get the hang of it all. Here's what it looked like in November |
06-07-2023, 10:22 PM | #2 |
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So you ask whats the plan?
So after buying the car, I have simple plans.
Bring it back to spec+ Change Oil (Mobile 1 engine + redline MTL)~~done Plugs and Coils~~done F30 Grey Brembos + 328i rears with new rotors + pads (EBC Yellow) + Motul 600~~done Bilstein B12 Kit~~done M3 front control arms ~~done M3 rear control arms~~done M3 front sway bar~~done Rear bushings and wheel bearings~~done Battery~~done Waterpump and hoses~~done Solid Aluminum RSFB Maybe VCG Maybe new oil pain + gasket M3 rear sway bar 3.64 diff (LSD?) N54 Intake How it sits today: Last edited by underwatervans; 06-09-2023 at 07:57 PM.. |
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06-08-2023, 07:44 AM | #3 |
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I would not suggest the M3 rear sway bar until you have an LSD. Particularly in autocross you don't want to be lifting up on a drive wheel with an open diff.
The Aluminum RSFB are one of the best things you can do the car. Amazing how much it improves the rear end. Other than that, that's a really great build, get out there and get seat time! After your first few track days get something to data log, AIM SOLO2 DL (my recommendation) or Garmin Catalyst and you'll be amazed at how fast you'll start improving. |
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06-09-2023, 07:56 PM | #4 |
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Today I changed the water pump and t-stat. Solid 5 hour job even with my underbody tray dropped already. Very tiring indeed, here's to hoping that I won't be doing that again anytime soon.
OH also - I forgot to add that I purchased the wheels from a fellow forum member @Dieselboy @amg6975 Yeah - was thinking about sequencing it that way but when I drop the subframe for the RSFB, I'm gonna want to do everything I can while it's down. Related note - my rear subframe is pretty rusty... I was thinking about replacing the whole thing (maybe replacing with M3 subframe complete with LSD?). Has anyone had theirs fail yet? |
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06-10-2023, 02:41 AM | #5 | |
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Drives: 2011 E82 128i, 1989 E30 325ix
Join Date: May 2023
Location: Alaska
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