This is GrimmSpeed's new OVERTAKE BB500 Turbocharger and it is another powerful turbocharger designed by Chase Trogan who is a senior engineer at GrimmSpeed. The Overtake Ball-Bearing 500-Series Turbocharger takes the same formula as the GrimmSpeed CHASE JB400, but improves on the design with a faster spool, and increased airflow. This turbocharger features a larger 55lb compressor wheel, along with a massive 60mm turbine wheel. This will allow the engine to breathe easier at higher RPMs. By combining slick aero wheel designs and a dual ceramic ball-bearing center cartridge, GrimmSpeed was able to achieve a quicker spool when compared to the CHASE JB400 turbocharger by 150 RPMs.
The OVERTAKE BB500 will stay in the powerband after shifts and holds substantially more power when compared to the stock turbocharger to redline. It produces +129 horsepower and 109 ft/lbs of torque than a tuned stock STI turbocharger when research and testing had been performed on GrimmSpeed's STI on E85 with simple tuning and fuel modifications. Vehicles with cams, a built engine, and other major modifications will certainly see larger gains. This turbocharger is very competitively priced in the market when compared to other turbochargers in the same size and power category, and it is a direct mount fitment.
HIGHLIGHTS:
Compressor Wheel Size (Inducer / Exducer): 55.1mm / 74.6mm with a 54 trim
Turbine Wheel Size (Inducer / Exducer): 60mm / 55.1mm, 84 trim
Compressor Flow: 55 lb/min
Compressor Wheel Construction: Billet 2618 alloy
Compressor Housing Construction: A356 alloy
Turbine Housing Construction: D5S alloy
Bearing Type: Ceramic ball-bearing design featuring silver-plated 4340 bearing cages
Compressor A/R: 0.65
Turbine A/R: 0.88
Very robust and reliable at high boost levels and in race applications
Dual-piston rings and advanced oil flinger design to combat oil leakage and CHRA pressurization
Wastegate actuator will come pre-set to 15 psi
This turbocharger was able to produce 440 WHP and 460 WTQ on GrimmSpeed's Stage 3 2020 STI with tuning and fuel upgrades
Ideal for daily drivers that demand more power
Durable enough for track-dedicated race cars
Will include new gaskets, fluid lines, and hardware for the installation