Gazoo Racing might be featured in the Supra’s name, but to you and me, the 2020 model year is nothing more than a Z4 with a fixed metal roof and the lesser version of the inline-six turbo engine. BMW of North America recall of seven Supras stands proof of how little input Toyota had with the powertrain, and given these circumstances, the aftermarket is much obliged to squeeze out every ounce of performance.
Team owner Stephan Papadakis of Papadakis Racing is one of the few people who decided on improving the B58 in the Supra, and it all started with the teardown back in August 2019. The next step was to level up from 335 to 1,000 horsepower with a lot of expensive parts, and the emphasis was put on the intake system and turbocharging.
The third part of the build starts by putting the crankshaft back into the block, which hasn’t even been washed. The same bearings were utilized, which goes to show that BMW knows how to design an engine to be durable from the get-go. New pistons, the bone-stock rings, a flange-style pulley, and the oil pump were next, followed by the timing chain, the factory head gasket, exhaust camshaft, and the flexplate.
Fast-forward to the next stage, Stephan highlights there’s no dipstick to check the oil. That’s all done electronically, which is a bit of a shame as well as a hassle by all accounts. After installing the spark plugs, the red-coated valve cover and injectors also went in.
The 3D-printed aluminum intake manifold was designed specifically for this 1,000-horsepower engine yet the throttle body is completely stock. On the exhaust side, the gaskets were followed by the custom-built manifold, turbo housing, turbo, and a pair of waste gates.
Stephan didn’t have the time to put the engine back into the GR Supra, reprogram the ECU, and dyno the thing to reveal if these mods are enough to develop 1,000 ponies and tons of torque. Taking a look at the video’s description on YouTube, episode four is coming soon with a dyno test to validate the crankshaft and rear-wheel horsepower.
After a 1:43 scale model of a Ferrari 250 GTO sparked Mircea's interest for cars when he was a kid, an early internship at Top Gear sealed his career path. He's most interested in muscle cars and American trucks, but he takes a passing interest in quirky kei cars as well. Full profile
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