This month's installment of our crate-motor series wraps up with three of the nastiest powerplants available anywhere: an LSX-block monster that is at home both on the street and on the strip, and two traditional Pontiac race engines. Nelson Racing Engines, Butler Performance, and Kauffman Racing Equipment have stepped up to offer these turbo and supercharger-fed neck-snappers.

Nelson Racing Engines
For the last 11 years, Nelson Racing Engines (NRE) in Chatsworth, California, has been turning out innovative and extremely powerful street and racing engines based on GM, Ford, and Chrysler designs. The company is especially well-known for its 1,500-plus-horsepower street engines and has been on the leading edge of technology with its LS-based designs.

Tom Nelson, president of Nelson Racing Engines, selected the 455ci twin-turbo LSX from the company's Hot Rod Series of turbocharged engines, as it represents horsepower levels unheard of in street cars. The emphasis is on performance, as well as value for the dollar. At $36,000, it's not at all cheap, but it offers very competitive performance compared to other combinations.

"This engine is built and designed for the guy who wants to drive the hell out of his car, with brutal power and extreme reliability," said Tom Nelson. "This motor will get you in the 8s at over 165 mph in the quarter-mile on pump gas." He adds: "This is intended for the crazies at heart."

Without a doubt, many late-model Pontiac fans (and maybe even some traditionalists) will take a hard look at this combination as reliable, four-figure street power for their machines.

Engine Buildup Worksheet
Price: $36,000
Engine displacement: 455 ci
Horsepower: 1,801
Torque: 1,685 lb-ft
Bore/stroke: 4.125-in bore, 4.25-in stroke
Block/crank combo: 9.7-in deck height GM LSX or RHS 97
Bore/stroke ratio: .97:1
Rod/stroke ratio: 1.48:1

Bottom End
Block: 2010 GM LS
Preparation: Measure and inspect
Deck height: 9.74-in
Crank: 2010 Callies Magnum 4340 forged
Preparation: Measure and inspect
Balancer: NRE custom billet
Rods: Oliver billet 6.300-in
Preparation: Measure and inspect
Bearings: Clevite H Series
Pistons: JE Pistons, custom NRE specs
Piston to deck height: 0.005-in
Piston pins: JE
Method used to retain piston pins in pistons: Double- spiral locks
Rings: Hell Fire
Rod bolts/head studs: ARP
Balancing specs: Balanced within 1 gram dynamic

Oiling System
Oil pan: GM
Oil pump: GM Performance Parts

Heads
Casting number: All Pro, six-bolts per cylinder, rectangular port
Chamber open/closed: Open
Head mods: Fully CNC-ported
Combustion chamber volume: 72 cc
Maximum flow at 28 inches of water:
Intake: 410 at 0.700-in lift
Exhaust: 265 at 0.700-in lift
Compression ratio: 8.8:1
Valves: REV, Inconel, 2.25/1.625-in
Angles used in valve job: Multiple
Retainers: Titanium
Keepers: 10-deg
Valve guides: Bronze
Valve seals: Viton
Rocker shafts: T&D
Rocker arms: Shaft-mounted, 1.7:1 roller
Pushrods: Smith Brothers 3/8-in

Cam
Brand: NRE billet solid-lifter
Duration at .050: Propietary grind, mid-230s
Valve springs: Manley
Seat pressure: 180 lb-in
Open pressure: 420 lb-in
Timing chain: GM

Induction
Type: EFI
Throttle body: BBK dual or Nelson single blade, 1,700 cfm
Fuel injectors: Siemens Deka, two per cylinder, 60-lb/hr
Fuel rails: Nelson custom
Computer (ECM): Custom
Fuel management system: Electromotive Tec 3
Intake manifold: NRE sheetmetal

Power Adder
Turbos: Two 72mm Turbonetics
Wastegates: TIAL 44mm V-Band billet
Blow-off valves: TIAL
Intercooler: Custom to your application
Maximum Boost Pressure: 36 psi on 116-octane race fuel, 14 on 91 octane

Ignition
Type: 60-tooth crank trigger
Wires: Taylor
Plugs: Autolite 3924

Exhaust
Headers: NRE stainless
Primaries: 1.875-in
Collector size: 3.00-in

Gaskets
Brand: SCE Copper Gaskets

Optional Upgrades and Prices
Electronic boost control: $1,000
Fully polished package: $2,500

Additional Items Required But Not Included
Charge piping, customer-supplied
Accessory drive: $1,000-$2,000
Starter: $300

Source
Nelson Racing Engines
(818) 998-5593
www.nelsonracingengines.com

Butler Performance
Butler Performance sent us this 2,000-plus-horsepower single-turbo Pontiac race engine combination, which is attractive from both cost and maintenance standpoints.

"The single-turbo combination is easier for racers to tune and package in an existing racecar than a twin-turbo," says David Butler of Butler Performance. "Even though it uses only one turbo, it will still make way more power than most chassis will be able to handle."

This combo is based on an IA II block, forged crankshaft, and a huge Turbonetics turbo. Additionally, the new high-port Edelbrock heads can be substituted for the standard Edelbrock Wide Ports for even more flow. Butler can also put together a twin-turbo version for roomier engine bays or if the customer likes the balanced appearance of the twin setup.

"We've sold a few of these engines recently," David reports. "Probably the most famous of these is currently in John Welter's '02 Trans Am. With a best trap speed of 209 mph in the quarter, you know it's making power."

Engine Buildup Worksheet
Price: Starting at $34,500
Engine Displacement: 505 ci
Horsepower: 1,100-1,200+ on pump gas/ 2,000+ on race fuel or alcohol
Torque: 1,000-1,100+ lb-ft on pump gas / 1,800+ lb-ft on race fuel or alcohol
Bore/stroke: 4.350/4.250-in
Block/crank combo: IA II/aftermarket forged (pump gas), billet (race gas)
Bore/stroke ratio: 1.02:1
Rod/stroke ratio: 1.58:1

Bottom End
Block description: 2010 IA II aftermarket high-nickel block with siamese cylinders (over 0.250-in thick at 4.350 bore), splayed four-bolt billet main caps, extra-thick deck
Preparation: Pressure-tested, sonic-tested, deburred, bored and honed with torque plate, deck squared (block and head both fitted with O-rings when using copper head gaskets)
Deck height: 10.230-in
Crank: SCAT(forged)/Crower (billet)
Preparation: Inspect and clean
Balancer: ATI Super Damper elastomer band
Rods: Oliver billet steel, 6.700-in
Preparation: Pin-fit/check sizes
Bearings: Federal Mogul Race Series
Preparation: Measure and inspect
Pistons: Ross/Butler spec.
Preparation: Deburr/remove sharp edges, pin-fit
Piston to deck height: -0.005 to 0.000-in
Piston pins: Ferrea tool steel
Method used to retain piston pins in pistons: Double spiral locks
Rings: Total Seal TNT
Preparation: Measure and file-fit
Rod bolts/head studs: ARP/Oliver WSB/ARP
Balancing specs: +/- 1 gram

Oiling System
Windage tray: Optional
Crank scraper: Butler Performance
Oil pan: Canton or Billet Fabrication custom aluminum
Oil pump: Butler Performance/Melling Pro pump or Titan billet gerotor pump
Preparation: Clean and inspect

Heads
Casting number: Edelbrock Performer RPM or Edelbrock Victor High Ports (optional)
Chamber open/closed: Open
Head mods: Ported, 3-angle competition valve job surfaced (O-ring for copper head gaskets)
Combustion chamber volume: 87 cc
Maximum flow at 28 inches of water:
Intake: 330+ at 0.700-in lift (Victor heads/ 400 at 0.700-in lift)
Exhaust: 250 at 0.700-in lift (Victor Heads/ 270 at 0.700-in lift)
Compression ratio: 8-8.25:1/ pump gas (9.0:1 on race gas)
Valves: Ferrea stainless, 2.19/1.77-in
Angles used in valve job: 45/45-deg
Mods: Back-cut
Retainers: Titanium
Keepers: Chromoly
Valve guides: Edelbrock bronze
Valve seals: Viton
Rocker types: ARP rocker studs or T&D Shaft
Rocker arms: Roller, Scorpion or T&D, 1.65:1
Pushrods: Butler Performance, 5/16-in (3/8-in on Victor heads)

Cam
Brand: Comp Cams hyd. roller/pump gas or solid-roller for race-gas combo
Duration at 0.050: Proprietary 260-275 deg
Lift: 0.650-in for pump gas or 0.750-in for race gas
Centerline: Proprietary
Lobe separation angle: Proprietary
Installed position: Proprietary
Lifters: Comp Cams hyd. or solid-roller
Valve springs: Comp Cams
Seat pressure: 165-185 lb-in for hyd.-roller / 260-280+ lb-in for solid-roller
Open pressure: 380 lb-in/750+ lb-in
Timing chain: Butler Performance, billet gear, 9-keyway crank sprocket

Induction
EFI: FAST XFI
Throttle body: Accufab 75mm for pump gas, 90mm for race gas
Fuel injectors: Bosch 120-lb/hr for pump gas, 160-lb/hr for race gas, custom for alcohol
Fuel rails: Butler Performance custom
Computer (ECM): FAST stand-alone
Fuel management system: Weldon, sized for application
Intake manifold: Edelbrock Super Victor EFI or Hogan custom sheetmetal
Mods: Ported

Power Adder
Turbos: Precision Turbo 88mm or 106mm
Wastegates: TIAL
Blow-off valves: TIAL
Intercooler: Precision/custom per application
Maximum boost pressure: Pump gas 12psi/race gas or alcohol 30+ psi

Ignition
Distributor: MSD Pro-Billet and MSD crank trigger
Amplifier: MSD
Coil: MSD
Wires: MSD
Total timing: Per application

Exhaust
Headers: Custom mild steel/coated or optional stainless
Primary tube diameter: 1.875-in

Gaskets
Brand: Butler Performance/Cometic or SCE copper head gaskets
Ancillary Components Aluminum valley pan, high-flow water pump, Hi-Torque mini starter, flexplate or flywheel, Butler Performance aluminum valve covers Turbo kit includes 88 or 106mm turbo (twins optional), custom intercooler, wastegate, blow-off valve, charge and exhaust tubes

Optional Upgrades and Prices
Twin turbo upgrade under 2,000 hp: $1,500
Twin turbo upgrade (on race gas), 2,500 hp and up-includes Hogan's sheetmetal intake, larger fuel system, more injectors, etc.: $12,000
Serpentine belt system and accessories: $1,035
Edelbrock Victor High Ports: $3,000

Source
Butler Performance
(931) 762-4596
or toll-free (866) 762-7527
www.butlerperformance.com

Kauffman Racing Equipment
As mentioned in the first installment of the series, Ohio's Kauffman's Racing Equipment has a build-to-order crate-motor program that offers the buyer a wide variety of options, making the horsepower-to-dollar ratio work out for most budgets. The last time out, we covered one of its more basic street/strip engines. This time we are going all out with one of its top-of-the-line supercharged race engine combinations.

The KRE approach to big horsepower is centered on its aftermarket MR-1 block, a beefy billet crank, and a big, big psi blower. Indeed, these 500-plus-cubic-inch supercharged monsters are capable of over 2,000 hp, and the sound they make is drag racing personified.

Engine Buildup Worksheet
Price: $48,000
Engine displacement: 505 ci
Horsepower: 2,100
Torque: 1,500 lb-ft
Bore/stroke: 4.350/4.250
Block/crank combo: K&M Performance MR-1/Crower Billet
Bore/stroke ratio: 1.023:1
Rod/stroke ratio: 1.576:1

Bottom End
Block description: 2010 K&M Performance MR-1 cast-iron
Preparation: Nothing
Deck height: 10.240-in
Crank: Crower billet
Preparation: Nothing
Balancer: Blower hub, RCD
Rods: GRP aluminum, 6.700-in
Preparation: Nothing
Bearings: Federal Mogul
Pistons: Ross Racing dished
Piston to deck height: Zero
Piston pins: Ross Racing tool steel
Method used to retain piston pins in pistons: Spiral locks
Rings: Total Seal TNT
Rod bolts/head studs: ARP
Balancing specs: N/A

Oiling System
Windage tray: Built-in with oil pan
Crank scraper: None
Oil pan: Stef's dry sump KRE custom design
Oil pump: Nutter dry sump
Preparation: N/A

Heads
Type: KRE Warp 6 canted valve
Chamber open/closed: Open
Head mods: Custom
Combustion chamber volume: 65 cc
Maximum flow at 28 inches of water:
Intake: 512 cfm at 0.900-in lift
Exhaust: 385 cfm at 0.900-in lift
Compression ratio: 11:01
Valves: Ferrea titanium, 2.375/1.85-in
Angles used in valve job: 30, 45, 60, 75-deg
Mods: Custom
Retainers: 10-deg titanium
Keepers: 10-deg steel
Valve guides: Bronze
Valve seals: PC
Rocker shafts or studs: KRE custom
Rocker arms: T&D aluminum rollers, 1.70:1
Pushrods: Trend Performance, 7/16 to 1/2-in
Length: 11.250-in

Cam
Brand: Custom solid-roller
Duration at 0.050: Proprietary grind, 280-300 deg
Lift: 0.900-in
Centerline: Proprietary
Lobe separation angle: Proprietary
Installed position: Proprietary
Lifters: Crower solid
Valvesprings: Manley
Seat pressure: 375 lb-in
Open pressure: 1100 lb-in
Timing chain: Rollmaster double-roller

Induction
Injection: Mechanical system, Veney injection hat with three 5 9/16-in openings
Fuel management system: Waterman pump at 180-200 psi
Mods: None
Fuel line size: -8

Power Adder
Supercharger: SSI 14-71
Maximum boost pressure: 35-40 psi
Intake manifold: KRE custom, billet single-plane

Ignition
Magneto: MSD Mag 44
Coil: MSD Mag 44
Wires: MSD 8.5
Total timing: 25 degrees

Exhaust
Headers: Custom
Primary tube diameter: 2.375-in
Primary tube length: N/A
Collector size: N/A

Gaskets
Brand, type: Tin Indian Performance and copper gaskets

Optional Upgrades and Prices
K&M Performance MR-1A billet block: $8,400
Kobelco blower: $6,000
Carbon-fiber hat: $1,700

Source
Kauffman Racing Equipment
(740) 599-5000
www.krepower.com

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