615 Big Block Chevy Twisted HR Pump Gas Engine
Pump Gas Engines

615 Big Block Chevy Twisted HR Pump Gas Engine $20,150

Ultrastreet Big Dawg Twisted 615 Big Block Chevy Twisted HR Pump Gas Engine
615/925HP $20,150
Less Carb & Ignition

They Said It Was Impossible ... They Said It Couldn't Be Done. After A Year Of R&D And Testing With Several Major Manufacturers We Came Up With A Proprietary Design Hydraulic Roller Engine That Produces 925 HP On Pump Gas With All The Simplicity And Low Maintenance That Only A Hydraulic Roller Cam Engine Can Offer!!

  • Horsepower
  • Torque
  • Bore & Stroke
  • Compression Ratio
  • Fuel Requirement
  • 925 @ 6500 RPM
  • 815 @ 5200 RPM
  • 4.600 x 4.625
  • 10.9 to 1
  • 92 Octane

New Brodix Low Profile Intake!
  • Dart Big "M" Low Deck Block w/Splayed 4 Bolt Main Caps & .904" Lifter Bores
  • Manley 4340 4.625" Stroke Steel Crank
  • Molnar Severe Duty 4340 H-Beam Rods w/ARP 2000 Asymmetrical Bolts
  • Clevite 77 "H" Series Main & Rod Bearings
  • JE/SRP 10.9-1 Forged Aluminum Pistons w/Coated Skirts
  • Total Seal Plasma Moly Ring Set
  • SSRE Custom Steel Billet Hydraulic Roller Camshaft (1)
  • Proprietary .904 Short Travel Hydraulic Roller Lifters
  • Rollmaster Billet Timing Set w/IWIS Chain & Torrington Bearing
  • Brodix BB3X 380 Fully CNC Ported Rectangle Port Aluminum Heads
  • Manley 2.300" / 1.880" Titanium Valves
  • Isky Custom Design "Special Process" 1.550" Hyd. Roller Springs
  • Lightweight Tool Steel Retainers & 10° BeadLocs
  • ARP Head Stud Kit /Parallel Ground Washers
  • Scorpion 1.7 Race Series Aluminum Roller Rockers
  • Chromemoly (1) Piece .080" Wall Pushrods
  • FelPro HP Head Gaskets w/Pre-Flattened Steel Wire
  • Merlin X "New Design" Dominator Intake Manifold
  • SSRE/Moroso Pro Windage Series Oil Pan
  • Moroso Race Prepped Oil Pump w/Tig Welded HD Pickup
  • GM Performance Chrome Front Cover w/Billet Timing Pointer
  • Hi-Performance Harmonic Balancer
  • Complete Assembly Internally Balanced
  • Individually Dyno Tested & Tuned
  • Actual Dyno Sheet Provided
  • Footnotes:
  • (1) Composite Fuel Pump Rod Required with our custom camshafts.
Shafiroff Racing Engine Upgrade Packages
Holley Sniper EFI
Holley Sniper II EFI Package$2995
Includes: Holley Super Sniper EFI Unit, Sniper EFI Touchscreen LCD Programmer, Bosch LSU 4.9 Wideband Oxygen Sensor, Stainless Steel Clamp-On Oxygen Sensor Installation Kit (May Also Be Welded), Hyperspark Distributor and SSRE Custom Ignition Wires w/Looms. Base Tuneup and Parameters Set and Calibrated on Your Engine.
Igniton Components
Hyperspark Ignition Coil $39
Shafiroff Racing Engine Options
Fuel System Components
Why Buy A Carburetor From Us?

Yes, you can certainly purchase a stock carb from the big mail order companies but we've seen carbs out of the box down on power as much as 40HP and between 15-20HP is common. That's why we disassemble and blueprint EVERY carburetor before we ever bolt it on your engine. We then tune, adjust and jet your carb on your engine so you get every ounce of power that you paid for.

Even if you're considering one of our Engine Kits or simply looking for a replacement carb, the same blueprint work is done and we dyno test it on a comparable engine to yours before it ships!
 $Priceless
APD 1050 CFM 4500 Series E85 Carb Package includes: 2 Circuit Billet Carb, Phenolic Spacer, Aluminum AN Fuel Fittings, Studs & Gaskets. Dyno Tuned, Jetted and Calibrated on your engine.ImageShafiroff Racing Available Options Close$1495
APD 1050 CFM 4500 Series Carb Package includes: 2 Circuit Billet Carb, Phenolic Spacer, Aluminum AN Fuel Fittings, Studs & Gaskets. Dyno Tuned, Jetted and Calibrated on your engine.ImageShafiroff Racing Available Options Close$1395
APD 1175 CFM 4500 Series Carb Package includes: Carb, Phenolic Spacer, Aluminum AN Fuel Fittings, Studs & Gaskets. Dyno Tuned, Jetted and Calibrated on your engine.ImageShafiroff Racing Available Options Close$1395
MagnaFuel ProStar 500 Billet Gerotor Electric Fuel PumpImageShafiroff Racing Available Options Close$430
Igniton Components
MSD Electronic Ignition Package Includes: MSD Pro Billet Distributor, Hi Perf Gear, Custom Moroso 8mm Wire Set. Custom Curved and Calibrated To Your Engine. $595
MSD 6AL Digital Electronic Ignition Box w/Hi-Speed Rev Limiter $305
MSD 6AL-2 Digital Electronic Ignition Box w/Launch Control & Hi-Speed Rev Limiter $480
MSD Blaster 3 Hi Performance Ignition Coil w/HEI Style Post $65
MSD 8201 Pro Power Coil $159
Composite Distributor Gear (if required)ImageShafiroff Racing Available Options Close$125
Blocks
Dart Inner Valley Stud Kit (Improved Head Gasket Sealing) $95
Brodix Aluminum Block w/Steel Billet Caps, Special Head Stud Kit & Additional Machining (Slightly Less Peak HP) $4500
HIP® Process (Hot Isostatic Pressing) For Increased Durability With Aluminum Blocks $675
Connecting Rods
Callies Ultra H-Beam 4330M Timken Steel Rods w/ARP H-11 Bolts $1395
Timing
Cloyes 2 Piece Aluminum Timing CoverImageShafiroff Racing Available Options Close$195
Jesel "Original 2 pc" Belt Drive $1145
Oil Pumps - Oil Pans - Vacuum Pump
Lokar Custom Locking & Calibrated Dipstick (Upgrade)ImageShafiroff Racing Available Options Close$95
Vacuum Pump Kit Includes: Moroso 3 Vane Vacuum Pump & Adjustable Relief Valve, Breather Tank, AN Fittings, Jones Mandrel & Bracket Kit w/Radius Tooth HTD Belt. ImageShafiroff Racing Available Options Close$1495
Additional Parts - Labor - Accessories
Cometic MLS (Multi Layered Steel) Head Gaskets $125
SFI Approved Harmonic Balancer (Required At All Race Tracks) $150
ATI SFI Approved Super Damper Balancer (Includes Hone To Fit Labor) $295
Master Power Silent Drive Vacuum Pump Kit For Power BrakesImageShafiroff Racing Available Options Close$625
SFI Heavy Duty Flexplate & ARP Bolt Package $150
Boninfante Severe Duty SFI Flexplate & ARP Bolt PackageImageShafiroff Racing Available Options Close$229
Boninfante SFI Billet Flexplate & ARP Bolt PackageImageShafiroff Racing Available Options Close$395
PowerMaster Hi-Torque Mini StarterImageShafiroff Racing Available Options Close$229
Painless Performance Hot Shot Relay Kit (Recommended for above starter) $39
Edelbrock Aluminum "High Volume" Mechanical Water Pump (Short or Long Version)ImageShafiroff Racing Available Options Close$350
Meziere 55GPH Electric Water PumpImageShafiroff Racing Available Options Close$575
Billet Specialties Tru Trac Serpentine SystemImageShafiroff Racing Available Options Close$Call
Billet Specialties V-Track Pulley SystemImageShafiroff Racing Available Options Close$Call
Custom Powder Coating Packages Available $Call
SSRE Engraved Sheet Metal Valve Covers w/BreathersImageShafiroff Racing Available Options Close$375