# Combustion Engine Web-Based Simulator

10 Hacker News commenters recommended Combustion Engine Web-Based Simulator and 5 criticized it, November 2025 to November 2026. It was recommended in 1 of 13 months.

**Verdict:** People find this open-source engine simulator fun and cool for beginners, with plausible outputs for real engines. Critics say some physics and animations are inaccurate.

## Why people recommend it

- Fun and cool for beginners (3 comments): "Seems a bit optimistic, but still fun to play with." ([source](https://news.ycombinator.com/item?id=48864354)) "Imho, pretty cool, nonetheless." ([source](https://news.ycombinator.com/item?id=48873037)) "It's pretty cool for beginners." ([source](https://news.ycombinator.com/item?id=48875262))
- Plausible numbers for real engines (2 comments): "Nice little project, I inputted the dimensions of a engine I've been building" ([source](https://news.ycombinator.com/item?id=48865698)) "it seems reasonable with around 400HP and 450lbf for a 400ci NA V8" ([source](https://news.ycombinator.com/item?id=48869594))

## What people warn about

- Physics and animations often inaccurate (3 comments): "Nothing has an effect on redline RPM, you can create compression and turbo combos that would instantly grenade an engine" ([source](https://news.ycombinator.com/item?id=48865091)) "And like 60% of the animations were technically just wrong." ([source](https://news.ycombinator.com/item?id=48866365)) "Seems a bit optimistic, but still fun to play with." ([source](https://news.ycombinator.com/item?id=48864354))

## Cite as

Hacker Approved, "Combustion Engine Web-Based Simulator", https://hackerapproved.com/p/combustion-engine-web-based-simulator/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).