Designed to be the most responsive turbocharger for small displacement 200-300hp applications, the SR/42 is capable of lightning fast spool that will make most stock turbos blush. A perfect match for stock engines and drift or autocross applications, the unique trim on both compressor and turbine wheel coupled to a robust ceramic ball-bearing cartridge results in significant reductions in rotor group mass while allowing for reliable operation above 160,000RPM
Optimized for 1.0-2.2L displacement SI engines with power outputs between 200 and 325BHP, the SR/42 turbocharger is well suited to many high performance modern engine applications. It's 42mm compressor inducer supports flow rates of 38 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 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. For most applications, it's standard radial-flow turbine wheel, made of the high-nickel Inconel 713-C superalloy with either .64 or .86 A/R open volute housing is a great fit. However, peak turbine efficiency characteristics can be tailored to unique or heavily optimized applications when opting into the SR42/M motorsports selections. The aforementioned 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 an entire new unit.
All of our turbochargers are built to order to meet your exact requirements and specifications. Our current lead time is 4 weeks. Please email firstname.lastname@example.org 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: 34 lb/min (corrected)
Compressor flow range at 2:1 PR: 12-30 lb/min (corrected)
max. Compressor efficiency: 75%
max. Pressure ratio: 3:1
Max. Compressor tip speed: 575 M/S (165,000RPM)
Max. Turbine inlet temp: 985C (cast) / 1025C (316SS)
Billet 2618 Aluminum / 5-axis machined wheel
42mm full-bladed inducer
.5 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
.64 A/R housing Volute
"T2" inlet flange
Ported internal or external wastegate
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
Mixed flow turbine blade geometry
Cerakote Ceramic turbine housing coating
Custom anodizing of any billet aluminum components
low-boost, 1 Bar (std), or billet canister wastegate actuator