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Power System (Supercharger & Electric Motor)

7:48
35:53
638.1K views

At 7:48 in

Dale Earnhardt Inc's Secret Weapon of Restrictor Plate Domination: The "Wind Tunnel Engine"

What happens here

The heart of the system involved a Paxton supercharger, powered by a 20-horsepower electric motor (requiring the shop to be rewired to 440V). The supercharger was necessary to move enough air through the system to simulate race conditions, and its integration with the electric motor presented significant challenges, particularly in preventing belt slippage. The custom fabrication included specific boxes and splitters to direct the air flow from the carburetor through the supercharger and then out through custom exhaust pipes, simulating the entire engine's air path.

Goal: Integrate a high-power supercharger and electric motor to generate and control the necessary airflow for simulated race conditions.

Tools and materials

  • 20 Horsepower Electric Motor — Powering the supercharger
  • 3-inch hose — Connecting parts of the air path
  • Custom exhaust pipes — Simulating engine exhaust
  • Custom metal boxes/splitters — Directing air flow
  • Drive belts — Connecting the motor to the supercharger
  • Electrical wiring — Powering the high-voltage motor
  • Paxton Supercharger Paxton — Compressing air to simulate race conditions

What they say

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opportunity to work with. So So now we get down. We got our carburetor. We got our air cleaner. We got all that working. What's that? Um, so you just bypass there's a tube coming out the bottom of that that doesn't go through the runners. It just goes straight down that tube. It goes straight down that tube and it comes into this tube. And this is where the procharger This is the This is the guts of how we did it. The engineers figured we needed this was a 20 horse electric motor. Uh, and it ran on 440, I believe, something big. So, we had to rewire the shop to get to be able to run it. And so, we started looking around and, you know, I think Gino and John came up with this combination. So, it was my job to fit this. You know, we all decided it had to be a it's going to have to be a Paxton supercharger. It's going to have to be cuz that was the only way we were going to move that much air. And then the engineers, they figured out how, you know, what's it going to take to spin that? They did all that work and and and then the ratio the gear ratios of of this deal here. So, which we went through like a ton of belt iterations to get this to be consistent cuz the belt kept slipping and it was really it was that was the biggest struggle I think we had was getting the these two hooked together and actually running it without slipping because if the belt slip well then your air is different and then it's a waste of time. had to be super consistent for like 45 minutes cuz sometimes you would do a big matrix in the wind tunnel where you just turn the tunnel on and do this giant ride height matrix and was this thing running for an hour so it had to be really bulletproof. Um, so the air comes through the carburetor down into here in there and and I was like building it and I'm like, well, where's the air going to go? You know, I mean, well, since we're doing all this, I took it on the bottom and I hooked it, you know, the 3-in hose there, made some splitters, made these two boxes, and so the air the air actually came out the tail pipes in the wind tunnel. So now in four weeks we had this deal, you know, and people are starting to look at it. I think they were kind of laughing at it, you know, and Steve was kind of it's like, you know, nobody really understood it. I think Tom Ryan from the eight car understood it. Warren Bozel was really interested in it. You know, the guys that that built the cows and stuff there were were interested, but you know, some people were…

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