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New Highest Horsepower Naturally Aspirated V8

by Kyle Tomita on Tue, Sep 7th, 2010 | Client Vehicles, Dyno Records, On The Dyno

A new vehicle has broken the highest horsepower record for naturally aspirated engines.  The V8 in this truck puts out over 700whp. 

The truck is a Pro Stock 1956 Chevy Truck. 

Pro Stock 1956 Chevy Truck on dyno at PSI

Parachute greater than brakes

With a parachute and wheelie bars, this is a very fast '56 Chevy.  The owner/driver hopes to break into the 8s with this setup. 

Under the hood is a fully built 565 cid Chevy V8. 

565 big block

This engine is running at 14.7 to 1 compression.  The list of parts is extensive and from the best component manufacturers.  Power is transferred to the ground through a Turbo 400 with 4:10 gears.

Here is the video.

Pro Stock '56 Chevy Truck from Portland Speed Industries on Vimeo.

Here is a specs list:

  • 565 ci Dart block - tall deck
  • Pro 1 Dart Heads
  • 14.7 to 1 compression
  • Ross pistons - gas ported
  • Oliver Billet Rods
  • Callies crank - magnum
  • Comp Cams shaft rockers
  • Vickey Titanium valves
  • Comp cams belt drive
  • Sig Erson cam
  • Isky Red Zone lifters
  • Dart Tunnel Ram
  • 2 - 1050 Jet Dominators
  • MSD Crank Trigger
  • Turbo 400 with 4:10 gears
  • Trans Specialties springless conversion