Joel Guerra

software engineer / race car driver

Recent posts

What Is the Big 3 in a Car's Charging System?

The Big 3 are the three main wiring connections in a car’s charging system. They run from the alternator to battery positive, from battery negative to the body, and from the engine to the body. Alternator to battery …

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CDN Status on a TRMNL Display

I built a TRMNL plugin that shows Cloudflare, Akamai, and Fastly status side by side on an e-ink display. Here’s what it looks like and what you need to run it.

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Honda B/D/H/F Series Coil-on-Plug Wiring Diagram

In this guide, I’ll show you the universal wiring diagram for converting any Honda B, D, H, or F series engine to coil-on-plug using Honda D17 or K-series coils. In the accompanying video, I’m doing this conversion on …

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Why You Should Stiffen Your Honda Chassis

Stiffening the chassis on an older Honda can make the steering feel more direct by keeping the suspension mounts from moving around as much in a corner. The first brace I’d put on an EF Honda is a front strut tower …

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How Does an Engine Oil Cooler Work?

An engine oil cooler takes heat out of the oil before it goes back through the engine. The air-to-oil kind works like a little radiator. Hot oil runs through it and air carries the heat away. If you’re doing lap after …

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Building a Fuel System for a 500hp Honda

This is the companion guide of this YouTube video. For full context watch the video. The goal of the system is to fuel my built turbocharged B18C to the tune of 500 horsepower. By my estimation this fuel system could …

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Gifts for Car Guys and Girls for Under $50

Last Minute Gifts for Car Guys & Girls for Under $50 It’s two weeks to Christmas and you gave a gear head in your circle that you need to shop for. Car people can be hard to shop for. What do they like? Tools. But what …

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