Bottom line: Chevrolet moved the Corvette to sheet‑molded compound (SMC) for better strength, safety and cost.
The early Corvettes (C1‑C3) wore fiberglass bodies for about 20 years. When the C4 arrived in 1984, Chevy started using SMC, a kind of reinforced plastic that behaves more like steel.
Why Chevrolet Corvette Switched From Fiberglass to SMC Body Material – Explained
Image: Why Chevrolet Corvette Switched From Fiberglass to SMC Body Material – Explained – Performance Comparison and Specifications
Design & Looks
Fiberglass is light and easy to shape, which helped the first Corvettes get their iconic curves. However, it also flexed a lot and could crack under impact. SMC is poured into a heated steel mold, giving a smoother, more consistent surface and tighter panel gaps. The result is a car that feels more solid while still keeping the classic Corvette silhouette.
Performance & Mileage
SMC adds a few pounds, but the weight gain is far less than switching to an all‑steel body. The material is strong enough to handle higher‑speed crashes, so engineers could tune the suspension for better handling without worrying about body flex. The modest weight increase has a negligible effect on fuel economy – the Corvette still averages around 18‑20 mpg city and 27‑30 mpg highway, depending on the engine.
Price & Rivals
Manufacturing fiberglass is labor‑intensive. Each panel must be hand‑laminated and cured, which drives up cost. SMC is produced in large batches, reducing labor and scrap rates. That helped Chevrolet keep the Corvette’s price competitive against rivals like the Porsche 911 and later the Nissan GT‑R.
| Engine | Mileage | Price | Top Features |
|---|---|---|---|
| 5.7 L V8 | 18 mpg city / 27 mpg hwy | $58,000 |
|
| 6.2 L V8 | 15 mpg city / 25 mpg hwy | $68,000 |
|
FAQ
Why did Chevrolet change the Corvette’s body material?
To improve structural rigidity, meet safety standards, and lower production costs.
Is an SMC Corvette heavier than a fiberglass one?
It’s slightly heavier, but the difference is small enough that fuel economy and handling stay strong.
Does the SMC body affect repair costs?
Repairs can be more expensive than fiberglass because the material requires special molding techniques, but the increased durability often means fewer repairs overall.
What do you think about the switch to SMC? Share your thoughts in the comments below!
Source: Read Official News
