Product Details
Description
Garrett Powermax™ direct fit performance charge air cooler for the 2015+ BMW M3 and M4 boasts a 47%
larger core with dual pass coolant flows to help reduce intake manifold temperatures by an average of 10 °F.
CFD-optimized end tanks improve airflow through the core. An average increase of 12.4 horsepower and 4.9 lb-ft of torque was measured during back-to-back dyno pulls. This direct-fit performance intercooler installs in 1.5 hours and reuses the stock bolts, hoses, and clamps.
Performance Dyno Testing
We performed a vehicle dyno test to gather data comparing the OE to the Garrett intercooler. Multiple back-to-back dyno pulls measure intercooler effectiveness by comparing horsepower output, inlet and outlet temps, and OBD II data.
- The engine gains 12.4 horsepower and 4.9 lb-ft of torque on average after heat soak (10th pull)
- The engine gains 18.7 horsepower and 6.4 lb-ft of torque at the 15th pull
CFD Optimization
- The CFD-optimized design allows Garrett engineers to improve flow distribution through the end tanks.
- The charge air flow shown in the chart depicts air flow per passage
- The variation is ~7% from the mean flow
Thermal Data
- Garrett intercooler outlet temp is ~5 °F lower each run before heat soak
- OE intercooler has 90% instantaneous effectiveness
- Garrett intercooler has 92% instantaneous effectiveness
- Garrett intercooler outlet temperature is ~10 °F lower after heat soak
- At heat soak, outlet temperature drops by 10 °F
OBD II Data
- After heat soak, charge air flow rate and pressure increase
- ~2 lb/min higher charge air flow rate after 10th pull
- ~1.5 psi higher charge air pressure after the 10th run
Product Features
- Supports up to 980hp
- 47% larger core than stock
- Installs in stock location
- Cast aluminum end tanks
- Air-to-water design
- Bar-and-plate construction
OE Numbers
- 17517846235
installation
warranty
Warranty Varies By Product Application
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