The term small-block brings to mind reliability, legacy, and in the minds of many, average performance. Precision Race Engines in McMinnville, Tennessee, has redefined what it means to have a small-block. To them, average performance is not an option. To prove it, take a look at this video and watch them test a Chevrolet small-block that they built, displacing 427 cubic-inches. It is hard not to notice this stroker engine’s eight Hilborn stacks. Unlike vintage mechanical fuel-injection, this set up is all electronic, and controlled by a Holley HP ECU. Like we said, average performance is not an option, and this little powerhouse delivers 574 horsepower on the dyno, just watch for yourself.
PRC handles every facet of their engine builds: block machining, balancing, CNC-porting, and assembly. Every task is done by their in-house technicians. The engine in the video is evidence of what they do every day, and is just about as cool as it gets. A small-block Chevy engine making 574 Horsepower at 5,900 rpm, and 572 lb-ft of torque at 4,600 rpm is nothing to sneeze at. Especially when you can make that kind of power on Premium pump gas, not race fuel. That is nothing short of impressive.
With a 10.5:1 compression ratio, a hydraulic-roller cam, and CNC-ported, PRE cylinder heads, the specs on this engine explain why it is so powerful. The PRC heads feature an intake runner volume of 218 cc, a combustion chamber volume of 68 cc, and intake/exhaust valve sizes of 2.05/1.600 inches. For a full spec sheet on the heads, look at their website here.
The customer wanted an engine that wasn’t too radical. He wanted something dependable for occasional driving, but also something with enough power to quell his horsepower needs. We talked to Performance Race Engines, and they told us, “Target power was 525 horsepower, and it surpassed that with 574 horsepower.”