GM has been producing small-block and big-block engines for decades. Throw a few extra parts on one of these bad boys and you’ll be burning tires in no time. Before we talk about the best GM crate engines, let’s start by answering a few basic questions. Ooh, shiny. (source)
Let’s start with the 9.1:1 compression, which means you can run this on pump gas. Add in a cast aluminum block, titanium valves, and a forged steel crank attached to forged titanium rods attached to forged aluminum pistons. Top that off with hydraulic roller cams, aluminum heads, and a high-helix supercharger pushing 10.5psi of boost.
In reality, the roomy interior is full of odd shaped materials and cheap plastics that can easily turn anyone off. Oddly, as you move up the trim lines the Sienna loses ride and handling quality. The Sienna’s second row of seating does move quite a distance on its slide mechanisms, but the seats are quite difficult to remove if you want them out of the way for added cargo space.
The Nite was sort of a half-assed attempt at a special edition. The upgraded features were an upgraded paint and decal job along with some forged aluminum wheels. A blackout trim on top of a black paint job made it stand out and a decal running down the side that transitioned from blue to magenta gave it a menacing look, but that is where the upgrades ended. The suspension was also tightened up but this was hardly a performance pickup.
Plus, Chevrolet Performance Crate Engines include a 24-month or 50,000-mile limited warranty. That’s right, most of the GM crate engines you’re about to see carry a factory warranty, so hoon away. These are the big things, but there are many other parts that may or may not be included with your specific crate motor check with your provider for more details.
The Stow ‘n Go seating is standard equipment in the Town & Country and there are more creature comfort options available than you will find in the Dodge Grand caravan. For buyers who really want to stick with a Dodge or Chrysler product, the Town & Country is a better offering than the Dodge. It still falls short of used minivans built by Kia, Toyota, and Honda.
The Routan was designed to offer a firmer suspension for a more fun driving experience. Another fail. When compared to Kia and Honda used minivans, the firmer suspension makes for a clumsier experience all around. These shortcomings put a lot of pressure on the powertrain to offer a glimmer of hope for this used minivan. Nope, nope, nope.
It has 113-cc intake ports, 2.25-inch intake valves and 1.88-inch exhaust valves, a massive 1150cfm carb (yes, a carb), a solid-roller cam with 0.714 inches of lift, 12:1 compression, and it requires 110 octane fuel. Here’s GM’s succinct English translation of those stats: