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


Roush Engine 327SR

327SR - Designed for the driver looking for premium components but prefers a milder drive with 350 horsepower and 350 lb-ft. torque. Comes with a dual plane intake for improved driveability.

Technical Specs

Engine Model: 327SR
Horsepower (maximum):
350 HP (estimated)
Torque (maximum):
390 lbs./ft (estimated)
Displacement:327 cu. in.
Dart Iron Eagle 4-bolt main Sportsman, 8.2” Deck
Crankshaft Type: Eagle 4340 Forged Steel
Bore and Stroke: 4.00” x 3.250”
Connecting Rod Type:
Eagle 4340 Forged Steel “H-beam”
Compression Ratio: 10.0:1
Wiseco Forged w/ Plasma Moly Rings & Lightweight Pins
Timing Chain: Double Roller
Camshaft Info:
Hydraulic Roller w/ Roush Proprietary Grind
Lifter Type: Hydraulic Roller
Cylinder Heads:
Roush/AFR CNC Ported Aluminum
Intake Runner Volume: 185 cc
Combustion Chamber Volume: 61 cc
Valve Sizes: 2.02” Intake 1.60” Exhaust
Rocker Arm Ratio:
1.6:1 Full Roller w/ Aluminum Body
Spark Plugs: Autolite 3923 (or comparable)
Holley 770 CFM w/ vacuum secondaries & electric choke

Intake Manifold:
Edelbrock Peformer RPM Dual Plane
Water Pump:
Standard or Reverse Rotation is available
Fuel Filters: Roush Billet
Fuel Pump:
Holley Mechanical (N/A w/ reverse rotation water pump)
Air Cleaner: Roush Billet Oval
Valve Covers:
Roush Logo die-cast aluminum w/ Billet plug wire looms
Fuel Requirements:
Premium Unleaded (93 octane minimum or highest available)
Max. Recommended RPM:6,000
Firing Order: 1-3-7-2-6-5-4-8
Oil Pump: Melling High Output - Adjustable
MSD Billet disributor w/ Ford racing 9mm plug wires
29 to 31 degrees @ 3,000 rpm (not to exceed 31)
Oil Pan:
8 qt. T-style front sump or FOX-style dual sump available *Peak horsepower may be reduced when engine is equipped with the dual-sump pan
Oil Filter:
Motorcraft FL1-HP (or comparable)
Oil Weight:
10w30 non-synthetic for the first 3,000 miles
Flywheel: Steel SFI Rated, 157 tooth
Starter: Powermaster High-Torque