r/EngineBuilding
Engine Building - V8s and More
Founded June 2017 · Public — anyone can post
Engine Building and Swaps - V8 and all the rest!
Members
108,115
108K
Online now
—
not captured in the last snapshot
Posts per day
8.0
from the last 100 posts, spanning 12.4 days
Comments per post
—
no sample yet
Growth · 7d
—
not enough history yet
Growth · 30d
+1.6%
+1.7K members · ≈34d
Promo tolerance
—
not assessed yet
Last post
Sep 15
sampled Sep 15
Distinct posters
94%
of the last 100 posts
Tracking since Jul 31 · growth spans are the real distance between snapshots, not rounded windows. Posts/day is measured from the community’s own newest posts on Reddit, not from what Prowlo happens to crawl.
Member growth
Similar by content
Communities that discuss what r/EngineBuilding discusses.
Dedicated to online enthusiasts of pre- and post-war European, Asian, and American antique, classic, and vintage sports, racing, and classic autos. Historic context is always appreciated (nay, encouraged!).
A place to discuss and/or post pictures of classic cars, trucks, or bikes; including hot rods, car shows and auto museums. Note - this is not for classifieds. Posts selling vehicles or vehicle parts will be removed.
Ask your automotive mechanical and diagnostic questions here
See the full lists on similar subreddits.
r/EngineBuilding — frequently asked
How many members does r/EngineBuilding have?
r/EngineBuilding has 108,115 members as of our most recent crawl on Sep 15. Prowlo re-checks tracked communities on a rolling schedule, so this figure moves rather than sitting frozen at whatever it was when a scraper last ran.
Is r/EngineBuilding growing?
Over the last ≈34 days r/EngineBuilding changed by +1.6% — a gain of 1.7K members. We compare against the nearest snapshot we actually hold and state the real span rather than rounding it to a clean "30 days".
How active is r/EngineBuilding?
Around 8.0 posts per day, measured from the newest 100 posts on Reddit, which span 12.4 days. Posting rate matters more than subscriber count when you're deciding where to spend your time — it determines how long your comment stays visible.
When was r/EngineBuilding created?
r/EngineBuilding was founded in June 2017 and is a public — anyone can post community. Age matters: an older community with steady growth has survived Reddit's moderation churn; a young one with a spike may not.
Who posts in r/EngineBuilding?
Of the last 100 posts we sampled, 94% came from distinct accounts; the newest was published Sep 15. A low share means a feed dominated by a handful of accounts (bots, mods, or one prolific poster) rather than a community.
Can I promote my product in r/EngineBuilding?
We don't have a promo-tolerance read for r/EngineBuilding yet. Default to the safe approach: read the sidebar rules, contribute in threads where you gain nothing, and mention your product only when it is the honest answer to someone's question.
How do I monitor r/EngineBuilding for mentions?
Hit Watch on this page. Prowlo starts crawling r/EngineBuilding into your Dataset — every new post indexed and embedded, searchable semantically, queryable by your AI agent over MCP, and able to trigger keyword alerts in Slack. Prowlo is read-only; it never posts on your behalf.
Can my AI agent read r/EngineBuilding's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/EngineBuilding's members, growth, promo tolerance and similar communities as typed JSON — free, no credits. Connect your agent to api.prowlo.com/mcp and it can vet the community and start watching it in the same conversation.
Read-only · Human-in-the-loop
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