50 Engine Bolt Ons Gt 40
GT-40/AccuFab 65mm TB: 280 hp at 5,300 rpm, 326 lb-ft at 3,400 rpm
The GT-40 intake offers a revised runner length and cross section. The tuning effect works on the induction side as the runner length and cross section combine to provide a minor supercharging effect. This ram effect greatly improves cylinder filling over the air drawn in by the simple downward stroke of the piston alone. Like the headers (only in reverse), this tuning effect is a function of the variables in the manifold, which must be optimized in the proper rpm range. On our mild 5.0L, the GT-40 intake increased output from 261 hp and 321 lb-ft of torque to 278 hp and 323 lb-ft of torque. These numbers were increased slightly to 280 hp and 326 ft-lb with the addition of a 65mm throttle body from AccuFab. The tuning effect is obvious in the power curves, as the stock (small and long-runner) H.O. intake produced more torque than the GT-40 up to 3,330 rpm... View Related Article
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