The Dodge SRT-4 have specification : 230 horsepower and 250 pound-feet of torque in a subcompact car. It’s also a superb value, making it popular with younger “tuner” customers. This document describes some modifications that are commonly made to SRT-4, to help you recognize modifications that you may want to investigate further, if not question the owner about. These modifications could lead to powertrain warranty restriction. Increasing Boost and Changing Other Engine Parameters : Aside from simply replacing the stock actuator (fig.1) with a different one, there are a few ways to modify the operation of the stock unit. Adjustable metal tee used to bleed the wastegate actuator hose. It’s even easier for owners to do a “spring mod” by simply attaching a spring to the rod to increase the preload on the wastegate. Example of an electronic driveradjustable wastegate system. Another method of increasing power is to replace the factory turbo unit with a larger aftermarket one, or a kit to increase the power of the existing turbo. The idea is the same: to increase boost, and therefore, power. this can cause the same types of engine damage: burned pistons, blown head gaskets, damaged connecting rod bearings and turbo overspeeding. However, fault codes may not set, because the controller isn’t receiving accurate sensor information.
Tags : dodge srt 4, connecting rod bearings, wastegate actuator, powertrain warranty, head gaskets, engine parameters, stock unit, turbo unit, subcompact car, pound feet, preload, horsepower, powertrain, pistons, restriction
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