As if that wasn’t enough, GM then throws on a gargantuan 2.9-liter Whipple supercharger pushing a full 16 PSI of boost. All of that cast iron and forging means strength, and the COPO 350 can set dragstrip records day in and day out without breaking a sweat.
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:
Speaking of tires, they do absolutely no good if side to side movement with low pressure causes them to slip off the rim. Being in the middle of nowhere with rubber out of place and no way to change it is an awful situation. However, there are already bead lock rims on the market to prevent this exact problem.
The Nissan Quest barely survived the 2017 model year and reached the end of its production run after the 2018 model year. There are many reasons the Quest is out; the main one being that Nissan has not updated the oddly designed minivan for several years.
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.
This crate engine is hand-assembled in its own special facility, presumably so as to not risk contamination by one of those plebian engines we saw earlier. Gone are the days of solid lifters and cast-iron heads this beast combines an LSX cast-iron block, LS7/Z06 aluminum heads, forged steel crank and rods, forged aluminum pistons, hydraulic roller cams, and 10.2:1 compression.
A big block has higher weight and density in the block, as well as larger valve bores, a longer stroke, and a generally larger exterior size. A big block can have the same displacement as a small block, but only the most extreme small blocks encroach on this territory.
Check out this article where the Hot Rod staff weathers a ZZ427 to look like a 40-years-used L88. And if you have 12 minutes, let Tim Allen and Jay Leno walk you through the best of both worlds: a 1968 Camaro COPO clone with a modern 427 at its heart.