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Title Shelby cars north west, factory authorized dealer for shelby automobiles


Roush Engine 353R

353R - Considered the flagship of the ROUSH 5.0 Liter engines the internal engine architecture allows it to reach peak RPM quicker than any other model with this same displacement.

Technical Specs

Engine Model: 353IR 8-Stack Fuel Injection
Horsepower (maximum):
480 HP Est. (w/ Front Sump Pan)
Torque (maximum): 460 Lbs./Ft. Est.
Displacement: 353R cu. in.
Dart 4-bolt Iron Eagle, 8.2” deck, 4-bolt main #’s 2,3, & 4
Crankshaft Type:
Eagle Forged 4340 Steel (Internally Balanced)
Bore and Stroke: 4.150” x 3.250”
Connecting Rod Type:
Eagle Forged 4340 Steel “H-beam”
Compression Ratio: 10.00:1
Wiseco Forged w/ Plasma Moly Rings & Lightweight Pins
Timing Chain: Double Roller
Camshaft Info: Roush Proprietary
Lifter Type: Hydraulic Roller
Cylinder Heads: Roush/AFR Aluminum
Intake Runner Volume:
205 cc, fully CNC ported
Combustion Chamber Volume: 61 cc
Valve Sizes: 2.08” Intake 1.600” Exhaust
Rocker Arm Ratio:
1.6:1/Full Roller, Extruded Aluminum Body
Spark Plugs: Autolite 3923 (or comparable)

Intake Manifold:
“Weber Style” 8-Stack Induction System
Fuel System:
Electronic Fuel Injection utilizing Roush Calibration Dual Sync. Distributor, Electric “High Volume” Fuel Pump, Wide Band 02 Sensor, Intake Temp. Sensor, Engine Coolant Sensor, MAP Sensor, IAC (Idle Air Control), and Ignition Control Box
Fuel Requirements:
Premium Unleaded (minimum)
Max. Recommended RPM: 6,250
Firing Order: 1-3-7-2-6-5-4-8
Timing: 30 to 34 degrees @4,000 rpm
Oil Pump:
Melling High Volume - Adjustable
Oil Pan:
Canton Racing 8 qt. Fully Baffled Front Sump Road Race-Powdercoated *horsepower output can be reduced when engine is equipped with the Dual-sump pan
Oil Filter:
Motorcraft FL-1HP (or comparable)
Oil Weight:
10w30 - non synthetic for first 3,000 miles
McLeod SFI Rated Steel, 157 Tooth Ring Gear
Powermaster High Torque Gear Reduction (or equivalent)

Roush 353R Dyno