Built on decades of custom BBC engines
Before River Speed & Sport, this was Advanced Racing Engines — a full machine shop built on custom race engines, dyno-proven performance, and decades of big block Chevy specialty work.
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River Speed and Sport - Machine Shop
Custom race engines, built in-house
» Big block Chevy (BBC) specialists, from mild rebuilds to full-blown supercharged builds.
» Every engine dyno-tested before it goes out the door.
» Boats, street rods, off-road, and trucks — if it needs a custom engine, we build it.
How We Build
Here's what that looks like in practice:
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Built to Spec
Every engine is built around how you'll actually use it — no off-the-shelf shortcuts.
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Dyno-Proven
We pull real numbers before it ever leaves the shop, so you know exactly what you're getting.
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Race-Ready
Built by a racer, for racers — tested where it counts, on the water and the track.
Custom Engine Builds
From podium finishes to daily drivers
Our BBC builds have put down real numbers where it counts — including a 572ci engine that made 716 hp in a customer's ski boat, and a blown 468 built for a customer racing at the Outlaw Nationals.
Whatever you're building toward, we've probably built something like it before.
Dyno Testing & Tuning
*** Coming Soon!***
Know exactly what you're getting
Every custom build gets real dyno time before it goes in your boat, car, or truck — so the numbers on paper match what you feel behind the wheel.
Beyond Boats
Street rods, off-road, and trucks
Our roots are in custom engine building, not just boats. If it needs a rebuild, a custom build, or dyno time, we can likely help — no matter what it's bolted into.
Frequently Asked Questions
Ready to build something serious?
Whether it's a full custom build or a rebuild done right, let's talk about what you're working with.