B58 G2 Build Path
Quattrozone Motorsports Singapore/Malaysia
The B58 Gen 2 is a great platform to build and tune. It is stable, reliable, sounds great, and has a nice powerband. Similar to other modern BMW powerplants, the rods are the limitation and even aggressive stock turbo calibrations can push them to their limit. As long as we keep that factor in mind, we can take these from mild to wild or anywhere in between.
Stock fuel system + stock turbo + bolt ons can max out the turbo and run an ethanol blend with big power increases over stock. 450whp pump fuel 500+whp on Ethanol blend (E30)
Adding a P800 turbo is the next step, along with the Wagner charge cooler; at this point the limitation is the stock fuel system 500+whp pump fuel
The next step is adding port injection which will allow full ethanol fuel and another bump in power 500whp pump fuel, 600-650whp E85
Following the turbo and port injection upgrade in step 3, the next step would be a conventional turbo with pneumatic wastegate which will max out the engine’s capacity for power. Our in house favorite would be a 6466 if you like Precision turbo and a G35-1050 if you like Garrett. They both work well. 600-750whp on E85, depending on dyno and your risk tolerance
For more power than step 4; you’d need to build the motor. A very simple build with pistons/rods and valve springs will get you into the 4 digits if you have enough turbo. Avoid headwork in most cases. 1000+whp
A91 Supra
Stock Turbo
Infinity Auto Intakes
Do88 Intake Manifold
Custom catless exhaust
Reflex+ w 1050cc Injectors
Full FlexFuel Up to E85
The high RPM power drop off is due to the stock turbo running out of airflow; this is optimized for track work with moderate spool torque and thermally sustainable power delivery for multiple laps.
Hybrid Turbo Upgrades
Our preferred move for these is the Pure 800 turbo. They have been reliable, powerful, and quick spooling. The P850 and P900 don’t seem to add much performance. Beyond this, we recommend moving to a PTE 6466 or similar sized Garrett of your choice.
P900, Reflex with 1050x, AA GESI Catted Downpipe. Built by Maximum PSI
Built Motor + 72mm Turbo
Inconsistent traction on the dyno made getting good readings difficult but the car consistently makes good power and runs 60-130’s in the high 3’s. Built by Vanos Lab, owned by @jmacs_supra