Roush DL331SRXEDSC 331 CI EFI Street Race Crate Engine

Description

Need responsive small block displacement? Select the Roush Industries DL331SRXEDSC Crate Engine. Displacing 5.4 liters across 331 cubic inches, this electronic fuel injected small block Ford outputs 400 horsepower at 6000 RPM and 385 lb-ft torque at 4400 RPM. Multi port fuel injection and high flow CNC aluminum heads provide crisp road racing response and turn key drivability.

Solid cast iron block casting features heavy siamese cylinder walls anchored by four bolt ductile iron main caps. The reciprocating kit contains a 4340 forged steel 3.250 inch stroke crankshaft, forged H-beam rods, and forged aluminum pistons inside 4.030 inch bores. The resulting 10.0:1 compression ratio runs on 91 octane pump gas. Total dressed dry weight with front sump pan measures 440 lbs.

Key Features of Roush Industries DL331SRXEDSC

Buy Roush Industries DL331SRXEDSC crate engine packages to modernize classic roadsters and restomod Mustangs with turnkey electronic fuel injection. The complete package mounts intake manifold, electronic throttle body, multi port fuel rails, and standalone engine controller.

• Electronic throttle body fuel injection manages air fuel ratios in real time for crisp acceleration.
• Standalone electronic fuel injection computer meters fuel with precision across changing weather conditions.
• CNC ported aluminum cylinder heads maximize airflow speed across massive intake and exhaust valves.
• Four bolt main cast iron block provides extreme bottom end rigidity under high RPM track loads.
• Short stroke 3.250 inch forged crankshaft produces 385 lb-ft torque to launch lightweight roadsters hard.
• Hydraulic roller camshaft profile creates sharp valve events without valve float past 6200 RPM.
• Roush Industries DL331SRXEDSC valvetrain components feature full roller rocker arms to eliminate stud deflection.

EFI 331 Small Block Dyno Verification

Testing on water brake engine dynamometers validates 400 brake horsepower at 6000 RPM and 385 lb-ft torque at 4400 RPM across an expansive 2000 to 6200 RPM operating band. Cam duration measures 224 degrees intake and 232 degrees exhaust at 0.050 inch lift, producing 0.540 inch intake and 0.540 inch exhaust lift. The engine draws 15 in-Hg vacuum at 800 RPM on 91 octane fuel, holding 45 to 60 PSI hot oil pressure.

Classic Roadster Subframe Alignment

Small block Ford exterior dimensions fit directly into Factory Five, Superformance, and classic Mustang engine bays without chassis alterations. The internal neutral balance crankshaft couples to Tremec manual transmissions using standard bellhousings. The electronic throttle body clears factory hood lines, while the front sump pan clears roadster crossmembers.

EFI Small Block Startup Service Rules

Pre prime the engine oiling channels with high zinc break in oil using an oil pump drive tool prior to startup. This competition crate engine is not engineered for marine bilge setups, forced induction boost exceeding six PSI on stock ring end gaps, or unmetered nitrous oxide systems.

• Drain break in oil and replace the spin on lube filter after the first 500 operating miles.
• Perform regular motor oil changes every 3000 miles or six months with high zinc synthetic oil.
• Inspect high pressure EFI fuel lines, electrical connections, and oxygen sensor fittings every 6000 street miles.

Roush 331SRXEDSC Shipped Crate Manifest

Protection includes a 2-Year / 24,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the assembled 331 engine, electronic fuel injection intake, throttle body, ECU wiring harness, distributor, front sump oil pan, valve covers, and an official dynamometer run sheet.