{"id":148023,"date":"2026-04-28T15:05:10","date_gmt":"2026-04-28T20:05:10","guid":{"rendered":"https:\/\/engineswapdepot.com\/?p=148023"},"modified":"2026-04-28T15:05:10","modified_gmt":"2026-04-28T20:05:10","slug":"hennesseys-twin-turbo-7-2l-hemi-v8-makes-1355-whp-on-the-dyno","status":"publish","type":"post","link":"https:\/\/engineswapdepot.com\/?p=148023","title":{"rendered":"Hennessey’s Twin-Turbo 7.2L Hemi V8 Makes 1355 whp on the Dyno"},"content":{"rendered":"

\"Hennessey<\/a><\/p>\n

Hennessey Performance<\/a> offered 12 special “Demon 1700 Twin Turbo<\/a>” conversions. The project started with pulling the factory supercharged Demon V8 and wrapping it for storage. In its place Hennessey Performance installed a 440 ci (7.2L) Hemi V8 featuring a Dart iron block with 4.185-inch bore and 4.00-inch stroke. Inside are billet steel crank, forged steel rods, and billet aluminum pistons. Other upgrades include two Precision PT6870 turbochargers, twin water-to-air intercoolers, billet wastegates and BOVs, and stainless steel exhaust. Hennessey Performance upgraded the drivetrain with a Stage 3 automatic transmission with billet converter, upgraded driveshaft, and 3.09 ratio differentials. Hennessey Performance put a purple Demon 1700 on the dyno and made 1355 hp (996 kW) and 1202 lb-ft (1629 Nm) of torque to the wheels on 23 psi of boost.<\/p>\n