51/R Turbocharger

51/R Turbocharger

Regular price $975.00 Sale

New for 2024, we've updated and improved this turbocharger throughout. A revised compressor wheel improves transient response and boost threshold characteristics, and is optimized for low-medium range pressure ratios. Compressor efficiency is also improved with peak efficiency centered exactly where they are needing on most 2-2.5L engines.

an all-new 9 blade 52mm Turbine wheel perfectly matches this new compressor, and offers the same great response as the existing 47mm turbine wheel, hower with improved power capabilties at high RPM.

Optimized for 1.8-2.5L displacement SI engines with power outputs between 300 and 525BHP, the 51/R turbocharger is well suited to many high performance modern engine applications.  It's 51mm compressor inducer supports flow rates of 50 lb/min, while also providing impressive surge resistance for a wide flow range; critical for correctly matching the high volumetric efficiency across wide RPM ranges seen with today's modern 4 and 6 cylinder engines.

Optional compressor shroud designs further increase compressor map width, while also improving compressor efficiency closer to surge, resulting in impressive spool characteristics and low to mid range engine torque output.  Based around a patented and fully serviceable ball-bearing cartridge featuring second-to-none materials selection throughout, this turbocharger is built to last even under high temperatures and rotor speeds.

A wide range of turbine options are available, allowing for a perfect turbine match under virtually all operating conditions within this power range. The serviceable and modular nature of the CHRA design, in conjunction with our commitment to customer satisfaction and product adaptability allows for repair, modification, or upgrading of your turbocharger at any time, without the unnecessary re-purchasing of a entire new unit.


All of our turbochargers are built to order to meet your exact requirements and specifications.  Our current lead time is 3 weeks. Please email info@spectrummotorsportssolutions.com for more information.

All prices are listed in USD, with taxes applicable to Canadian residences.  Please email directly for inquiries and invoicing in CAD.



Compressor choked flow rate: 50 lb/min (corrected)

Compressor flow range at 2:1 PR: 8-42 lb/min (corrected)

max. Compressor efficiency: 72%

max. Pressure ratio: 4:1

Max. Compressor tip speed: 535 M/S (150,000RPM)

Max. Turbine inlet temp: 985C (cast) / 1025C (316SS)





Billet 2618 Aluminum / 5-axis machined wheel

51mm full-bladed inducer

.86 A/R housing volute

Billet Aluminum backplate



Water-cooled, Ball bearing Cartridge

Integrated oil feed restrictor

Silocone Nitride Ceramic balls

M50 bearing rings

Silver-plated 4340 bearing cages



Inconel 713-C turbine wheel w/ 4140 chromoly shaft

54mm or 60mm inducer diameter

.86 A/R housing Volute

"T2" inlet flange

Ported internal or external wastegate

Optional features:

Conventional ported compressor shroud

Billet 6061 ported shroud compressor inlet

Adjustable compressor sound production (quiet operation, or audible compressor noise)

Mixed flow turbine blade geometry for turbine efficiency optimization

Inconel 718 wastegate flapper assembly w/ Nitronic-60 wastegate bushing

"T3" inlet .82 A/R turbine housing

316 stainless V-band inlet/outlet .86 A/R turbine housing

Cerakote Ceramic turbine housing coating

Custom anodizing of any billet aluminum components

Low-boost, 1 Bar (std), or billet canister wastegate actuator