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Engine and Suspension Details

10:59
47:55
191.6K views

At 10:59 in

Mike Skinner's 1995 Goodwrench NASCAR Truck: The FIRST Ever Truck Series Champion!

What happens here

Mike opens the hood of the truck to reveal the engine compartment. He explains the regulation for the compression ratio, which was 12.5:1, and a controversial rule in one season that mandated air cleaners connected to the headlights, which was soon outlawed. He points out the radiator and the custom-built chassis tubing around the engine. He also shows the small sway bar, noting that modern cars use much thicker sway bars and coil-over suspensions compared to the early Truck Series leaf-spring setup. He explains that NASCAR would use restrictor plates to limit horsepower, demonstrating how rule changes were implemented to control the speed of the trucks relative to the Cup Series cars.

Goal: Showcase the truck's engine and explain suspension differences.

Tools and materials

  • Engine Hood N/A — Providing access to the engine compartment
  • NASCAR Craftsman Truck Chevrolet — The subject of engine and suspension details
  • Radiator Indy Racing Radiators — Cooling the engine
  • Shock Absorbers Bilstein — Part of the suspension system

What they say

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Back in this era, were these frames built symmetrical or were they offset like the front clips, the frame rails, that kind of stuff? No, it's a it's was then and still is it's a what we call a perimeter chassis. Like the Pro Late and Super Late, it's offset chassis with a straight frame rail down the right side, and then a perimeter frame rail on the left side. Um these are still perimeter cars. They're they're they're um you know, they're the weight balance. You can only have 55% on the left, 45 on the right. Um where the Super Late models like 58 or 60% left side weight. They they don't they don't allow the NASCAR vehicles to do that. So but it's so it's a perimeter. The the perimeter chassis it's harder to get left side weight percentage because it's you have all this framework out here but it's a ton safer and I think that's NASCAR's goal there and their their reason the reason behind the perimeter chassis is the safety. So the front clip was symmetrical also it wasn't like offset to then they start doing that in later years they'd have front clips that were more favored to turn left or until they well no they're still not allowed to do that. They still have to be symmetrical in the front. Now there's a tolerance and so of course everybody pushes the tolerances as far as it can go. Nowadays with the with the new the new car the next gen car that they're racing now they're all the same. All the frames are the same. We used to have this truck not this truck but we had another truck that was really super light that Todd Berrier built. The team built it Todd kind of engineered it and it was so light that you'd have to even if you didn't hit anything you'd have to change the front clip about every four races because it was so light it would just flex so much it would just the chassis would go to hell. So you just basically had to it was good for about 1500 miles and then you had to you had to re just cut the frame off and put a new one on but it was hauled it hauled it hauled ass. It was it was lightweight and went good. NASCAR really watches that stuff now. It's it's a little harder to to get by with stuff like that nowadays. Does this truck still have an engine now? Yep. Still got it in there? Yep. Yeah it's just like it came off the track, basically. This was the one year they had this stupid rule um they had this air cleaner like that and these deals came up to the headlights, these hoses came up to the headlights and you got your air from that. It was…

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