Cooling is the part of a build nobody wants to talk about. It’s not as exciting as boost numbers or dyno sheets. But when you’re running a turbocharged 408 Windsor on the street, it’s the thing that determines whether your build survives or becomes an expensive lesson.
Project Stranger Things needed a real solution. We found one.
The Problem With Running a Turbo Small-Block Ford on the Street
A 408 Windsor already generates serious heat. Add a turbocharger, and the thermal load climbs fast. Add tight engine bay packaging — the kind that restricts airflow even at highway speeds — and you’ve got a cooling system that has to work hard every single time the car moves.
The old 14″ electric fan wasn’t keeping up. Not because it was a bad fan. Because the project outgrew it. A street/strip build that sees spirited driving needs more than what a 14″ unit can pull.
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The answer was going bigger. And smarter.
Why We Chose the Flex-a-lite FlexWave 16″
The upgrade is a 16-inch Flex-Wave® LoBoy Electric Fan — and the size jump from 14″ to 16″ alone isn’t the whole story.
What makes this fan different is the patented FlexWave blade design. Flex-a-lite engineered the blade geometry to move up to 25% more airflow than conventional fan blades at the same diameter. The result is 3,000 CFM of pull — serious airflow for an electric fan in a tight engine bay.
Here’s the part that matters for a build like this: despite that performance, the FlexWave is Flex-a-lite’s thinnest 16″ fan. In a cramped engine bay where every inch between the radiator and the engine counts, that’s not a minor detail. That’s the difference between fitting and not fitting.
The Test Drive Result
This is where the spec sheet stops and the real world starts.
30 miles. Spirited driving. A turbocharged 408 Windsor under load.
The FlexWave kept coolant temps under 190 degrees the entire run.
That’s the number that matters. Not the CFM rating on the box. Not the blade geometry patent. The fact that after 30 miles of hard driving — the kind of driving that exposes weak points fast — Project Stranger Things stayed cool, stable, and in the safe zone.
For a street/strip build that’s going to keep seeing more power, that result matters. A lot.
What’s Next
The FlexWave passed the first real test. But while we were deep in the cooling system, we made one more upgrade worth mentioning.
Flex-a-lite also offers a billet aluminum radiator cap — and it’s the kind of detail that makes sense to do while you’re already there. The cap is machined from billet aluminum with a satin black finish, rated at 16 psi, and fits most domestic and import vehicles. It’s not a gimmick. Under a pressurized cooling system that’s actually working hard, a quality cap matters. A cheap plastic cap that doesn’t seal properly or hold pressure is a liability you don’t need on a build like this.
It’s a small thing. But on a turbo street car, small things add up — in both directions.
With cooling sorted, Project Stranger Things can keep moving. More power is coming. We’ll let the temps tell us how it handles it.
