Live MappingMaxxECU ProjectsWork Blog Sierra Cosworth MaxxECU Converted This is a 3-Door Sierra Cosworth used for Classic Rallying. This customer was having troubles with the antiquaited original Marelli system. He opted for our MaxxECU Cosworth conversion system:MaxxECU Cosworth Conversion SystemWe fitted the system here in the workshop and popped it straight on the Dyno for a tune. This customer has a 34mm restrictor for competition use. So we have installed 2-Maps he can change on the fly for road use without the restricor.
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