Dart Iron Eagle Race Series Engine Block Small Block Ford [4.125 in. Bore | 351C Main Size | 9.200 Deck Height]
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Iron Eagle Small Block Ford Engine Block
Material: Superior iron alloy
Bore: 4.125" (unfinished)
Bore/Stroke: 4.185" x 4.250" (max recommended)
Cam Bearing Bore ID: SVO 2.203" - 2.205"
Cam Bearings: Specially-coated & grooved with three oil holes
Cam Bearing OS: +.010", +.020", +.030"
Cam Bearing Press: .002" - .003"
Cam Journal OD: Standard Ford Small Block (can be bored for 55mm)
Cam Plug: 2-3/8" Dia. cup plug
Cylinder Wall Thickness: .250" minimum @ 4.185" bore
Cubic Inch: 468ci max recommended
Deck Height: 9.200"
Deck Thickness: .675" minimum
Fuel Pump: Mechanical pump provision
Freeze Plugs: Standard Ford Press-in cup plugs 1-1/2" O.D.
Head Bolts: 1/2" Blind holes
Lifter Bores: Standard Ford .8747" - .8757" Honed to size
Lifters: Standard Ford - Hydraulic rollers need tie-bar style lifters
Main Bearing Size: 2.749" (351C)
Main Bearing Bore: 2.9415" - 2.9425" Honed to size
Main Thrust Width: .913" - .915"
Main Caps: Steel- 4 bolt, all 5
Main Cap Register: Deep stepped register on each side (no need for dowels)
Main Cap Press: .003" - .004"
Main Cap Bolts: #1: 1/2" (2) 3/8" (2)
#2, #3 & #4: 1/2" (2) 7/16" splayed (2)
#5: 1/2" (2) 3/8" (2)
Main Cap Torque: #1 - #5: 105 ft/lbs (All 1/2" bolts); #2, #3 & #4: 65 ft/lbs (Outer 7/16" bolts) #1 & #5: 35 ft/lbs (Outer 3/8" bolts)
Oil System: Standard Wet sump or SVO dry sump, Priority Main oiling with external pump (wet or dry)
Oil Filter: Standard Ford filter
Oil Pan: Standard Ford 351W oil pan required
Rear Main Seal: 4.500" x 3.750" Standard 1-Piece seal - Felpro #2921 or #2942
Serial Number: On Right front and main caps
Starter: Standard
Stud Hole/Head: 1/2" Standard SVO with Blind holes
Timing Chain/Gears: Standard SBF components
Timing Cover: Uses stock 351W aluminum cover
Weight: 190 lbs
Specifications:
The Dart Iron Eagle Small Block Ford Engine Blocks put Ford racers in front with these cast from superior iron alloy engine blocks. Working with leading Ford racers and engine builders, they designed the Iron Eagle Race Series and Sportsman small blocks to solve the shortcomings of production engine blocks used in high performance and competition applications. Dart blocks for Fords are produced on dedicated tooling and machined on state-of-the-art CNC equipment. They added the features that Ford racers need to build powerful and reliable engines. Staring with the small block Ford's big achilles heel, the oiling system! With Dart's vastly improved oiling system, the need to "band-aid" the oiling system with a high volume oil pump is a thing of the past. Using a standard oil pump and today's lifters, without restrictors, makes engine assembly easier and eliminates the guess work of determining restrictor size. Factory stock engine blocks were designed to be mass-produced economically and to operate in a passenger car environment. Original equipment oiling systems are typically restrictive and feed oil to the top of the engine first. The common practice has been to use a high-volume oil pump to offset these shortcomings and help the main bearings get more oil to survive. Dart aftermarket blocks have been designed with a less restrictive oil system which feeds oil to the main bearings first; a "priority main" oiling system. Many of us in this industry are inclined to use a high-volume oil pump due to history. However, this causes excessive oil to the top of the engine. Restrictors are then used in the lifter galleys to reduce the amount of oil to the top. Modern lifter designs typically have small oiling orifices which restrict the oil reaching the top of the engine. Using a standard -volume oil pump with current lifter designs and the Dart priority-main oiling system eliminates the need for restrictors, simplifying engine assembly and taking the guess work out of oiling system design. Features:
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