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.
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.
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:
Like the old COPOs of the 60s, the 2011-14 models adhered to strict NHRA guidelines. That meant super-small production numbers and a price payable only by professional race teams. It also meant the car’s engine could only make 530 horsepower. But much like the Japanese engine restrictions of the 1990s, that figure seems to have been framed in air quotes. In 2016 a (not extensively) modified 2014 COPO Camaro ran an 8.323-second quarter mile at 165.80 miles per hour. Doing the math, that car was making closer to 1200 horsepower. 1200.
The trouble with looking for used minivans; well, any sort of used vehicle, is that you have to do a ton of research to make sure you are getting the best possible buy. Not the best buy in the financial sense of the word, but in the quality of the vehicle that you are buying. That is why we decided to put together a list of the worst used minivans available. We want our readers to have the best information possible when spending a lot of their hard earned cash.
GM crate engines can usually be ordered through your local GM dealership. You might see online retailers like JEGS or Crate Engine Depot offer these engines, but they’re almost always asking the same price as Chevrolet themselves. We’ve found the Gandrud Auto Group’s GM Performance Motor website is the best resource around. Please note, we are not responsible for large amounts of hours lost while browsing crate engines.
The Nissan Quest does have the saving grace of being equipped with a fuel efficient engine for the class. The most recent models are all powered by a 3.5L V6 that is capable of 260 hp and 240 lb-ft of torque while delivering 22 mpg on the highway.
If any car was worthy of carrying the original ZR1’s torch, it was that one. The numbers are huge: 638 horsepower and 604 lb-ft, with 90% of peak torque available from 2600 to 6000 rpm. Translation: lots of power on tap, whenever you want it.
It also favors a hydraulic roller camshaft instead of the original’s flat-tappet cam. It makes a few extra ponies over the old model, too: 480 horsepower and 490 lb-ft of torque will melt any tires this engine’s hooked up to.
The powerplant behind them was the legendary 427 “L88”, a 450-horsepower 7-liter engine found in many other GM cars including the Corvette. But this version had high compression, required race fuel, and made an insane-for-the-time 450 horsepower.
This isn’t the 350 that your neighbor pulled out of a C10 truck and slapped a hot cam into. No, this is a 110-octane-only race crate engine built exclusively to win races at the local 1320. GM advises that the LSX454R comes with no warranty and is “not for road use”.
It also offers fewer interior storage areas throughout the cabin, then there is the 25.7 cubic feet of cargo capacity. While nearly 26 cubic feet sounds significant, it is smaller than nearly every other model in the segment.
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.