Field Report: This 900hp Air-Cooled Sleeper is WILD!

Tuned In

With 903hp at the wheels, a 9.71-second quarter-mile at 161mph on an unprepped strip, and a fully air-cooled 3.6L turbocharged engine, this Porsche is the definition of a sleeper. In this video, we chat with Arthur to uncover the secrets behind his beastly build.

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Originally a 230hp Carrera Supersport, Arthur's Porsche now runs 102mm @lnengineeringllc Nikasil barrels, ARGO conrods, a GT3 RS crank, CMW Racing billet heads prepared by @ramsheadservice8427 , and a @precisionturbo 8385 pushing 38 PSI. The drivetrain features a 996 Holinger sequential gearbox, billet 32-spline axles, and OEM @Porsche (yup!) CV joints.
Cooling is a unique challenge for this air-cooled monster, with dual oil coolers, fuel cooling strategies, and a switch to a water-to-air intercooler keeping intake temps in check so far without the need to use ice on the strip. Engine management comes from a tried-and-true Autronic ECU, once a leader in the market but now a little long in the tooth but an @AEMpowerTVelectronics dash/logger helps keep it ticking the boxes it needs to for this particular project.
Running on E85, with dual 1000hp @WeldonAutomotive pumps and a @BoschMotorsportAustralia 044 primer, this car shows what’s possible when you push air-cooled tech to its limits and it was awesome to see running in the Flying 500 at the @WorldTimeAttackChallenge. A sleeper? Absolutely. And one that’s redefining what these classic Porsches can do at that.