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302 Mains
- Iron Eagle Race Series Engine Block
- Small Block Ford
- Bore: 4.125"
- Deck: 9.200" (351C)
- Main Size: 302
Specifications:
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 50mm)
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: 2.249" (302)
Main Bearing Bore: Standard Ford 2.441" - 2.442" Honed to size
Main Thrust Width: .926" - .928"
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: 7/16" (2) 3/8" (2)
#2, #3 & #4: 7/16" (2) 7/16" splayed (2)
#5: 7/16" (2) 3/8" (2)
Main Cap Torque: #1 - #5: 65 ft/lbs (All 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: Aftermarket Ford 302 with dipstick in pan required
Rear Main Seal: 4.250" x 3.625" Standard 1-Piece seal - Felpro #2922 or #2941
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 302 aluminum cover
Weight: 190 lbs
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
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.
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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:
- Siamesed Cylinders: Standard 4.000" or 4.125" cylinders can be safely bored to 4.185" diameter. Extra-thick walls prevent cracking and produce excellent ring seal.
- Scalloped Water Jackets: Increase coolant flow around cylinder barrels to prevent detonation, extend engine life and produce consistent cylinder temperatures.
- Steel Four-Bolt Main Bearing Caps: Sportsman Blocks have three 4-bolt center caps with splayed outer bolts for maximum strength, Race Blocks feature all five 4-bolt mains, rear cap uses standard 1-piece seal.
- Stock Components: Provisions for stock motor mounts, accessory drives, smog pumps, starter brackets, oil pans and pumps.
- Upgraded Oiling System: Has a complete stock-type system plus a low-tension priority main oiling system with front and rear external oil pump feeds.
- Dual Crossovers: Allow oil flow to be metered with restrictors for roller lifter cams and/or roller rocker arms to reduce oil flow and windage.
- Reinforced Head Bolt Bosses: Blind tapped to prevent leaks and produce accurate torque readings. Extra-thick decks prevent head gasket leaks.
- Standard Camshaft and Cam Drive: Standard cam and cam drive can be used. Lifter valley of Sportsman Blocks have provisions for production hydraulic roller lifters.
- Precision CNC Machining: Ensures consistent high quality and eliminates expensive "blueprinting".
Part TypeEngine Block
Product LineDart Iron Eagle Small Block Ford Engine Blocks
BrandDART
Package Width250.0
Weight250.0 PG
Part CategoryPerformance Parts
Main Journal Type302 mains
Engine Block StyleAftermarket/OEM tall deck
Engine Block MaterialCast iron
Cylinder Bore As Shipped4.115 in (104.521 mm)
QuantitySold individually
Raised Cam LocationNo
Freeze Plugs IncludedYes
Main Bolt Style4-bolt
Deck Height9.2 in (233.68 mm)
Main Bearings IncludedNo
Main Cap MaterialSteel
Rear Main Seal Style1-piece
Main Caps IncludedYes
Finished Cylinder BoresNo
Cylinder Bore Diameter4.125 in (104.775 mm)
Cam Bearings IncludedYes
Part FitmentSemi Universal
Main Cap Fasteners IncludedYes
Vendor Part Number31384295
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
