Reynolds 390 Engine Technology
The Reynolds’ 390 engine technology eliminates the need for iron bore liners in aluminum engines. This allows casting of the cylinder block and bores as an integral unit. The technology is a three-part system consisting of the hypereutectic 390 aluminum-silicon alloy, compatible pistons and a special cylinder bore finish. When properly applied, it can produce a lightweight, strong, compact and relatively low-cost aluminum engine block.