Custom Engine Builds

Description

ScienceofSpeed has designed, tested, and put into use some of the most impressive NSX engines for uses varying from the street-driven NSX to the offroad NSX powered race car. Are you repairing your factory engine, and wanting to keep it as original as possible? Or, are you building a supercharged or turbocharged high-performance engine? ScienceofSpeed has a solution for you.

our process: through in-house research and development, we have perfected the best formula of component materials and design, machining and clearances, and assembly techniques. Each engine is built in our climate-controlled engine assembly room where each component is measured and recorded as a part of our blueprinted assembly process. In addition to the high-performance components used by ScienceofSpeed, each engine is rebuilt using all new seals, gaskets, and bearings.

stages are rated by crankshaft horsepower capacity: to help our customers match their power goals with the proper modifications ScienceofSpeed offers three "stages" of engine modification.

  • Stage 1 (3.0L): this stage is intended for 1991-96 M/T NSX or 1997-05 A/T NSX. This engine can produce factory power (using factory compression pistons) or for forced induction up to 550 BHP. The package includes a blueprinted assembly that includes cylinder block processing, cylinder head processing, forged pistons, bushed factory connecting rods, and all new seals & gaskets.
  • Stage 2 (3.2L): this stage intended for all NSX years. This engine can produce factory power (using factory compression pistons) or forced induction up to 650 BHP. This package includes a blueprinted assembly that includes a re-sleeved cylinder block, cylinder head processing, forged pistons, bushed factory connecting rods, and all new seals.
  • Stage 3 (3.5L): this stage intended for high-performance applications for all NSX years using stand-alone engine management. This engine can produce an increase in factory power in naturally aspirated applications or forced induction up to 750 BHP. This package includes a blueprinted assembly that includes a re-sleeved cylinder block, cylinder head processing, forged pistons, bushed factory connecting rods, and all new seals.

These stages are rated in horsepower at the crankshaft since power measured at the wheels can vary by chassis dynamometer used. A 15% drivetrain loss factor (the loss of power between what is measured at the wheels & crankshaft) is used for a general guideline. Keep in mind that these ratings are what the engine is capable of producing with the addition of a properly designed supercharger or turbocharger system.

suggested options: Each engine is assembled with new seals, gaskets a factory timing belt. In addition to the options available to each stage, we also recommend considering the following items depending on age & application:

  • ScienceofSpeed Lost Motion Assembly Kit
  • factory water pump
  • ScienceofSpeed Billet Oil Pump Gearset
  • factory timing belt tensioner or ScienceofSpeed Locking Timing Belt Tensioner
  • ScienceofSpeed Oil Pan Baffle

Options

Stage 1 - 3.0L

Factory power or up to 550 BHP at the crankshaft with forced induction.

Our most popular engine for supercharged and turbocharged 3.0L applications. Engine designed for factory 3.0L engines (3.0L cast iron cylinder sleeves are retained) for up to 580 crankshaft horsepower (approximately 500 whp). Precision blueprinted assembly including pistons, cylinder head studs, and new seals, gaskets & bearings. Stage 1 includes:

components:

  • ScienceofSpeed forged low compression piston set (pistons, rings, locks, & pins) with Xylan skirt coating
  • MLS head gasket set
  • ARP head stud set
  • complete new genuine factory cylinder head seal set, cylinder block seal set, bearing set, & timing belt

services:

  • cylinder heads: surface heads, inspect guides, competition valve job
  • cylinder block: surface deck, machine, bore, & hone cylinder sleeves to size
  • clean & inspect cylinder heads, cylinder block, connecting rods, and crankshaft
  • bushing of factory connecting rods for floating pin
  • blueprinted assembly: set ring gap, measure and adjust clearances, record weights, provide specification sheet

options:

  • precision balancing of rotating assembly (recommended for racing applications)
  • Time-sert cylinder head fastener threaded holes (recommended and required if cylinder heads have been previously removed)

 

Stage 2 - 3.2L

Factory power or up to 650 BHP at the crankshaft with forced induction.

Engine ideally suited for original 3.2L engines & 3.0L engines interested in increased displacement and power. Engine designed for either 3.0L or 3.2L engines (3.0L engines will be increased in displacement to 3.2L) up to 650 crankshaft horsepower (approximately 550 whp). See note on fuel above. Increased capacity of up to 700+ crankshaft horsepower is possible with recommend options below. Precision blueprinted assembly including pistons, cylinder head studs, and new seals, gaskets & bearings. Stage 2 includes:

components:

  • ScienceofSpeed forged low compression piston set (pistons, rings, locks, & pins) with Xylan skirt coating
  • MLS head gasket set
  • ARP head stud set
  • nodular ductile iron dry cylinder sleeves
  • complete new genuine factory cylinder head seal set, cylinder block seal set, bearing set, & timing belt

services:

  • cylinder heads: surface heads, inspect guides, competition valve job
  • cylinder block: remove factory sleeves, install cylinder sleeves, pressure check cylinder block, surface deck, machine, bore, & hone cylinder sleeves to size
  • clean & inspect cylinder heads, cylinder block, connecting rods, and crankshaft
  • bushing of factory connecting rods for floating pin
  • precision balancing of rotating assembly
  • blueprinted assembly: set ring gap, measure and adjust clearances, record weights, provide specification sheet

options:

  • upgraded connecting rods, recommended for applications >650 hp
  • billet steel main caps, recommended for applications >650 hp (main journal align bore required)
  • main stud kit, recommended for applications >650 hp (main journal align bore required)
  • 36mm intake valve (for 3.0L cylinder heads)
  • Darton Modular Integrated Deck (MID) sleeve

 

Stage 3 - 3.5L

300+ BHP naturally aspirated or 750 BHP at the crankshaft with forced induction.

The ultimate forced induction engine for the NSX. Compatible with either 3.0L or 3.2L engines, the 3.5L stroker engine is the ultimate engine for your high end supercharged or turbocharged application! Not only is the engine capable of 800+ crankshaft horsepower (approximately 680 whp) but it also produces a huge increase in torque including increased compressor response from the increased stroke (78mm factory stroke is increased to 86mm) provided by the 4130 steel crankshaft and connecting rods.

Looking for just an assembled 3.5L short block? We have those available as well.

components:

  • ScienceofSpeed forged low compression piston set (pistons, rings, locks, & pins) with Xylan skirt coating
  • ScienceofSpeed 4130 billet stroker crankshaft
  • ScienceofSpeed 4130 billet stroker connecting rods
  • MAHLE Clevite Tri-Armor connecting rod & main journal bearings
  • MLS head gasket set
  • ARP head stud set
  • nodular ductile iron dry cylinder sleeves
  • complete new genuine factory cylinder head seal set, cylinder block seal set, & timing belt

services:

  • cylinder heads: surface heads, inspect guides, competition valve job
  • cylinder block: remove factory sleeves, install cylinder sleeves, pressure check cylinder block, surface deck, machine, bore, & hone cylinder sleeves to size
  • clean & inspect cylinder heads, cylinder block, connecting rods, and crankshaft
  • bushing of factory connecting rods for floating pin
  • precision balancing of rotating assembly
  • blueprinted assembly: set ring gap, measure and adjust clearances, record weights, provide specification sheet

options:

  • billet steel main caps, recommended for applications >650 hp (main journal align bore required)
  • main stud kit, recommended for applications >650 hp (main journal align bore required)
  • 36mm intake valve (for 3.0L cylinder heads)
  • Darton Modular Integrated Deck (MID) sleeve
ScienceofSpeed Stage 1 3.0L Forced Induction Engine - NSX, 3.0L

enpp-2281

$7,250.00
ScienceofSpeed Stage 2 3.2L Forced Induction Engine - NSX, 1991-05

enpp-2282

$9,750.00
ScienceofSpeed Stage 3 3.5L Forced Induction Engine - NSX, 1991-05

enpp-2283

$18,950.00