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Windows Media
Quicktime

Custom built Hemi motors, iron block, aluminum block, blown
Price will start at about $10,000

CAST IRON 426 STREET HEMI BLOCK
Maintains 4.25" bore size and water flow between the cylinders for improved cooling and sealing durability. If you want to drop in a Hemi where a Big Block used to be, select the block with cast/drilled ears to accommodate the Big Block engine mounts.

Finish Bored - Zero Decked - Painted - Cam Bearings & Freeze Plugs Installed $3000

HEMI CAST IRON SIAMESED BORE BLOCKS
Siamesed-Bore 426 Hemi® Blocks give engine builders flexibility. Blocks can be bored to the stock size of 4.25", but are specifically designed to be bored larger.

Sonic check each block if you approach or exceed the 4.50" bore diameters. $200

Finish Bored - Zero Decked - Painted - Cam Bearings & Freeze Plugs Installed $3100

HEMI MOPAR ALUMINUM CYLINDER HEADS

Interchangeable with production, these aluminum heads offer a weight reduction of 50 lbs. per engine set. Each features a single plug per cylinder (capability for dual), 2.25" intake/1.94" exhaust valve machining, and a 170 cc combustion chamber. Assembled approx. $1400

HEMI MOPAR CAST IRON CYLINDER HEADS

Stiffer and stronger than original, increased material permits porting for improved airflow. All components attach the same as original. Features 170 cc combustion chamber and 2.25" intake/1.94" exhaust valve machining. Assembled approx. $1200

I do build Hemi engines, however they can take a few months to build, so I also subcontract to a couple of other engine builders who specialize building these engines. Pricing will depend on how extreme the combination is.

Keith Black Blocks are a great choice for a street engines. Although there are a few disadvantages, they can all be successfully over come. Their cost is about $3000 over a Mopar iron block once machining is complete

Below are the Factory Hemis Mopar builds. I can supply these engines, but so can a number of other shops. I don't expect to sell these engines, rather I show them so you know what is available.

610HP / 528 Hemi Mopar Performance Crate Engine

Just in case 465 horsepower wasn’t enough, Mopar Performance Parts has developed this all new 528 cubic inch Hemi Crate Engine which pumps out 610 horsepower and 650 ft-lbs. of torque! Now you can ride in style and smoke the competition with this new 10.25:1 compression pump gas guzzling, fire breathing monster. The aluminum heads have 2.250” intake and 1.940” exhaust valves that are motivated by a 292°, 0.254”/0.543” lift hydraulic camshaft. The heavy-duty cast iron block with cross bolted mains, houses a 4.150” stroke forged steel crankshaft, and 4.500” bore forged aluminum pistons. The M1 dual plane intake is ready for an 850/900 cfm Holley® carburetor. Mopar’s precise electronic distributor and spark plug wires are included as are the black Mopar logo valve covers, chrome timing cover and 6-quart rear sump oil pan (1970-71 “E” body style).

Price: $17,500

Part # P5007630

Horsepower:   610

Torque:   650

Compression Ratio:   10.25:1

Block:   Cast Iron Street Hemi, 4.500" Bore

Crankshaft:   Forged Steel, 4.150" Stroke

Heads, Chamber Size:   Aluminum Hemi, 170 cc

Valves:   2.250" / 1.940"

Camshaft Lift:   Hydraulic, 0.524" / 0.543"

Dur. @ 0.050":   292

Intake:
M1 Aluminum Dual Plane

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525HP / 472 Hemi Mopar Performance Crate Engine

The 472ci Hemi crate engine from Mopar Performance is based on the 426 heavy-duty cast iron block with cross bolted mains. The 4.150” Stroke forged steel crankshaft Strokes the power up to 525 HP and belts out 540 ft-lbs. of torque. The cast iron Hemi heads are equipped with 20250” intake and 1.940” exhaust vales, heavy-duty single valve springs and topped off with a pair of chrome Mopar valve covers. The 292°, 0.524”/0.543” hydraulic camshaft is driven by a double roller timing chain that is hidden behind the chrome timing cover. Equipped with Mopar’s precise electronic ignition and dual plane M1 4 barrel intake, all this 9.0:1 compression Hemi needs is an 850 cfm Holley® carburetor and some high octane pump gas.

Price: $16,000
Part # P5249666

Horsepower:   525 hp

Torque:   540 ft-lbs

Compression Ratio:   9:1

Block:   Cast Street Hemi, 4.250" Bore

Crankshaft:   Forged Steel, 4.150" Stroke

Heads, Chamber Size:   Cast Iron Hemi, 170cc

Valves:   2.250"/1.940"

Camshaft Lift:   Hydraulic, 0.495" / 0.480"

Dur. @ 0.050":   236 / 236

Intake:   M1 Aluminum Dual Plane

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465HP / 426 Hemi Mopar Performance Crate Engine

Complete engine includes electronic distributor, Mopar plug wires, chrome six quart oil pan, and the M1 dual plane intake. The cast iron Hemi heads feature stainless steel valves and heavy duty single valve springs.

Price: $15,000
Part # P5249667

Horsepower:   465 hp

Torque:   486 ft/lbs

Compression Ratio:   9.0 to 1

Block:   Cast Iron Street Hemi, 4.250" Bore

Crankshaft:   Forged Steel, 3.750" Stroke

Heads, Chamber Size:   Cast Iron Hemi, 170cc

Valves:   2.250" / 1.940"

Camshaft Lift:   Hydraulic, 0.495" / 0.480"

Dur. @ 0.050":   236 / 236

Intake:   M1 Aluminum Dual Plane

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NEW! 540 HEMI® CRATE ENGINES — 650–900+ HORSEPOWER
The Mopar 540 Aluminum Hemi® Crate Engine is built for extreme Hot Rods and Pro Street cars. This is for the person who wants the horsepower and durability of a race engine and the drivability of a street engine. Available in carbureted or supercharged EFI versions, it can produce up to 900+ horsepower, depending on induction. This Hemi is a fully water-jacketed motor with a streetable camshaft, and it’s made with an all aluminum block that’s stronger and lighter than cast iron. The 540 Hemi will also be available in a completely polished version for the extreme show car enthusiast.

P5153312 540 Aluminum Hemi Crate Engine
Carbureted

$24,500
P5153313 540 Aluminum Hemi Crate Engine Carbureted, Polished $ 27,000
P5153314 540 Aluminum Hemi Crate Engine Supercharged $ 32,000
P5153315 540 Aluminum Hemi Crate Engine Supercharged, Polished $ 36,000

Specifications:
• Built with all-new components
• Aluminum Block with Steel Sleeves and Cross Bolted Mains (4.500" Bore)
• Aluminum Cylinder Heads
• Forged 4340 Nitrided Steel Crankshaft (4.250" Stroke)
• 4340 H-Beam Performance Connecting Rods
• Lightweight Forged Racing Pistons (10.75:1 Compression)
• Hydraulic Performance Roller Camshaft, degreed for max horsepower
• Hydraulic Performance Roller Lifters
• Complete Racing Gear Drive
• Aluminum Gear Drive Front Cover
• Roller Tip Racing Intake and Exhaust Rocker Arms
• Billet Aluminum Rocker Stands
• Hardened Performance Rocker Shafts
• Billet Aluminum High-Volume and Pressure Oil Pump
• Aluminum Oil Pan
• Stainless Steel Racing 2.25" Intake and 1.94" Exhaust Valves
• Aluminum Dual 4 Intake Manifold
• SFI-Approved Racing Vibration Damper
• Chrome Moly Pushrods
• High-Performance Roller Double Valve Springs • Steel-Performance Spring Retainers
• Hardened Valve Spring Keepers
• 1/2" Head Stud Kit
• 9/16" Main Stud Kit
• 1/2" Side Bolts on Mains
• Heavy-Duty Performance Engine Bearings
• Performance Gaskets
• Moly Performance Rings
• 1" Diameter Oil Pump Feed Line
• Raised Cam for more Rod clearance
• Precision Balanced Engine Assembly
• Aluminum Valve Covers
• Electronic Distributor
• Spark Plug Wires
• Aluminum Water Pump and Housing
Supercharged:
• Complete 871 Supercharger
• Complete Blower Belt Drive Kit
• Blower Intake Manifold
• Billet Electric Water Pump

Note: Crate engines that change the emissions performance of the vehicle may not be legal for use on vehicles regulated for highway use in California and other states. Horsepower and torque rating based on test engine. Ratings may vary on individual engines.

1971 Chrysler Street Hemi 426
Model Number: n/a

Size (cu-in) 426

Power (hp) 425 @ 5000

Torque (lb-ft) 490 @ 4000

Bore (in) 4.25

Stroke (in) 3.75

Compression 10.25:1

Carburetor 2-4V

In Valves (in) 2.25

Ex Valves (in) 1.94

Firing Order 1-8-4-3-6-5-7-2

Left Bank 1-3-5-7

Right Bank 2-4-6-8

Dry Weight (lbs) 843?