500-mile 2020 Supra B58 Engine Gets a Full Teardown
Papdakis Racing shows us the ins and outs of what makes this B58 engine more special and better than a 2JZ.
People love to reject reality and live in the past. That’s all fine and dandy, but in the cut-throat business that is the automotive industry, if you don’t move forward, you’ll get left behind. This is the case that Toyota found itself in when the carmaker decided it wanted to make a successor to the MKIV Supra. Toyota hadn’t made a performance engine in years, let alone a straight-six turbo. If you don’t have time to design and create the technology yourself, its best to leave the job to somebody who does.
Enter BMW, patrons of the almighty straight-six engine. Up until very very recently, if you wanted any car with a inline-six engine, your only choice was BMW. Literally not a single other major manufacture offered this engine configuration and that’s how and why BMW made it its bread and butter. After revolutionizing modern straight-six technology and working out the kinks of turbo technology with the N54 and N55 engines, BMW decided to make a refined, performance-based production motor from over a decade of learning about the platform. That motor is the B58 and Toyota is lucky to have it in their Supra. Papadakis Racing will show us why this is unequivocally the case.
The first thing that Stephan Papadakis, owner of Papadakis Racing notices about pulling the B58 from the Supra is how easy it is to remove from the car. Everything was able to be pulled in a simple and relatively easy fashion. One immediate quirk they noticed is that were unable to mount the engine to the engine stand in the traditional fashion (because the timing chain assembly is on the back of the motor where the transmission mounts). Engines are usually mounted to stands where the transmission would bolt.
The next quirk is how the turbo mounts to the exhaust manifold. Visually, there are only two ports where they turbo connects even though this is a 6-cylinder engine. This is due to the fact that the turbo manifold is actually integrated into the head, thus, the turbo mounts directly onto the cylinder head. This type of integration is also used on the intercooler for the water-to-air cooling, which is actually built into the intake manifold. The thermostat is 100% electronically controlled by the ECU and there is an integrated oil cooler directly onto the block itself, which is removable.
There are so many details and special attributes to this motor that are very unconventional and surprising. If you enjoy engine design or building engines, we highly recommend you watch the full video. Did Toyota make the right choice by teaming up with BMW? We definitely think so.
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