Show us your workspace – garage, carport, driveway, rented storage unit. What's your setup, what tool made the biggest difference, and what do you still need?
This Issue
DIY 6‑point roll cage in a home garage: everything I wish I knew before cutting the first tube. Six months of mistakes, one finished cage.
Six months ago, I decided to weld a 6‑point roll cage into my track car. I had a MIG welder, a grinder, and th...
Welcome to The Build Bay – introduce your current project. One photo, one sentence. Doesn't matter if it's running or in pieces.
This is the thread where you introduce yourself and your project. No build thread required – just one photo an...
Best sources for JDM engine and drivetrain parts in 2026? eBay is counterfeit central and Amayama shipping from Japan just doubled.
If you've tried to buy JDM parts recently, you've felt the squeeze. eBay is drowning in counterfeit parts that...
First time loading a base map on Speeduino – I've got a wideband O2 and a laptop. What am I looking for in the first datalog?
You've assembled your Speeduino board, wired it to your engine, loaded a base map, and now it's time to turn t...
Designed and Built a CAN Bus Digital Dash on a Raspberry Pi – Schematic, BOM, Python Source, and the Three Things I'd Do Differently Next Time
I replaced my aging analog cluster with a custom digital dashboard built around a Raspberry Pi 4, a 7‑inch tou...
Corner-balanced my own car on borrowed scales for the first time – before/after lap times at Road Atlanta, plus what the cross-weight numbers taught me about my driving.
I finally did it – I corner-balanced my track car on a set of borrowed Longacre scales, and the results at Roa...
K24A2 vs. J35A4 for a daily‑driven EG hatch – which actually makes more sense when you're not chasing a dyno number?
If you're building a Civic EG hatch for daily duty – stoplight to stoplight, canyon runs, and the occasional t...
Megasquirt vs. Haltech Elite vs. MaxxECU Race – in 2026, what are people actually running for a street/track dual‑purpose build? Not theory, real experience.
I've spent the last year talking to owners of dual‑purpose street/track cars – Miatas, E36s, 240SXs, and even ...
LS3 into a BRZ: it finally starts and idles. Here's the wiring pinout spreadsheet that took six weekends to get right.
After 14 months of fabrication, countless late nights, and six weekends just on the wiring, my 2013 Subaru BRZ...
Interest check: custom CNC brake duct backing plates for E36/E46. Need 20 people committed to get unit price under $150. Anyone in?
I'm working with a local CNC shop to run a batch of aluminum brake duct backing plates for E36 and E46 chassis...
Wet-lay carbon fiber intake duct – third mold attempt finally released clean. Photos of all three attempts, including the ugly ones, and what changed.
I spent six weeks and three different mold attempts to produce a single carbon fiber intake duct for my track ...