Wiring tools for people who actually care

Plan and wire your car like it actually matters.

Pin87 is a wiring-first ecosystem of tools, videos, and diagrams built for real cars in real garages. No fluff, no gatekeeping— just the stuff you wish existed 10 years ago.

Starting with calculators & reference tools. The full app is on the way. pin87.org will be the home base for all of it.

Tools & mini apps

The Pin87 toolbox starts with calculators and reference tools you can actually use while you’re standing next to the car—no mysterious spreadsheets, no “trust me bro” advice.

Early access concept Voltage drop math baked-in 12V systems first Ground architecture-aware
Voltage Drop Calculator
Live in app
Pick your wire gauge, length, and load current, and the calculator does the ugly math. Built around realistic 12.6 V / 13.8 V behavior, not fantasy numbers.
Targets wiring decisions, not lab trophies. Part of Pin87 Toolbox
Pick AWG / Circular Mils
In development
Start from the load and allowable drop, then let the tool back you into a sane gauge choice—complete with circular mils for people who want to understand what’s actually happening.
Helps you outgrow random forum charts. Education-first
Ground Path & Chassis Return
Planned
A visual way to think about return paths, straps, and the real current loops in the car so your grounds stop being an afterthought.
For the people who know “just bolt it anywhere” is a lie. Ground architecture

Videos & tutorials

The Pin87 YouTube channel will walk through fundamentals, real-car examples, and the “why” behind every recommendation—so you aren’t just copying a harness, you’re actually understanding it.

Battery & cable testing Jump-start safety Connector fundamentals Harness planning & teardown
Battery & Charging Deep Dive
Script locked
How to actually test a battery and alternator with realistic tools, and how bad grounds quietly kill charging systems over time.
Planned for the initial video library. Teaching, not flexing
Connector Fundamentals
In production
Deutsch, Weather Pack, Sumitomo, Yazaki—what matters, what doesn’t, and how to stop being scared of pins and seals.
Short, visual, and actually usable at the bench. Evergreen
The FC RX-7 Project
Series
A full rewire on a real car—planned from scratch, built like a product, and documented like someone might have to fix it later.
Mechanical, wiring, and a lot of honesty. Real car, real stakes

Downloads & reference

PDF cheatsheets, diagrams, and printable guides that pair with videos and tools. These will live here as they’re created, so this page becomes the archive instead of your Downloads folder chaos.

Battery Cable Best Practices (PDF)
Coming soon
Terminals to avoid, material choices, routing notes, and how to size and terminate cables without creating a rolling fire hazard.
Designed to be printed and used in the shop. Safety-heavy
Fuse Types & Where They Live
Planned
Blade, JCASE, MIDI, MEGA, PAL—pictures, amperage ranges, and where they usually hide in a car.
Pairs with the Fuse Types explainer video. Evergreen reference
Connector Face & Pinouts Library
Long-term
Front and back views, pin labels, part numbers, and ampacity details—built up over time from real projects.
Will grow slowly but stay accurate. Future library

Calder's Corner

A little space on the site reserved for experiments, side quests, and whatever random tech rabbit holes we fall into while building Pin87. This is where the odd stuff lives.

🤖
Calder's Corner • Lab Notes
Low-stakes chaos
Things that might show up here over time:
  • Half-baked UI sketches for future Pin87 tools.
  • Weird electrical experiments that didn’t fit a full video.
  • Book, tool, and flashlight recommendations that actually get used.
  • Design behind-the-scenes for how the app and videos are planned.
Eventually this might turn into a tiny blog, dev log, or a rotating gallery of “what we’re messing with this month.” For now, it’s just a reserved slice of the internet with our name on it.

About Pin87

Pin87 is a long-term wiring project built by a working technician who got tired of watching people struggle with bad diagrams, random advice, and tools that feel like they were designed by a committee instead of someone who actually fixes cars.

The goal isn’t to impress other professionals—it’s to give normal people the tools and understanding to build and repair their own cars without burning them down or getting lost in forum noise.

Safety first Real-world testing Respect for your time & money

Contact & updates

If you’re interested in the app, tools, or future wiring content and want to keep an eye on things, this is where you’ll find the official contact routes. As the project grows, this section will become more structured.

Email (manual for now)
coming-soon@pin87.org

For now the plan is to keep communication simple: questions about tools, ideas for future videos, or potential collaborations can all route through a single inbox once it’s live.

What to expect here

As the YouTube channel and app roll out, this site will become:

  • Home base for downloads and wiring references.
  • Landing page for the Pin87 app and related tools.
  • Index of projects like the FC RX-7 build.
  • Spot where Calder’s Corner quietly gets weirder.