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Discussion Starter #1 (Edited)
i know its cheaper and easier to sell the car and get a Z with a bigger engine but i want to know what i should have todo to get it done. Where should i get the software for the ecu to accept the different engine and what components would i need to change? how difficult would the conversion be and what would the price be. Should i have to get a whole new exhaust system. The year of the car is 2000 2.3.
 

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2000 E46 323i, 2000 3.0L and 2000 2.0L Z3's
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The first thing to do in confirm that your current engine is a twin VANOS engine. If it is a single VANOS engine then forget about the engine conversion, its too much trouble to get the electronics right.
 

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Discussion Starter #3
The first thing to do in confirm that your current engine is a twin VANOS engine. If it is a single VANOS engine then forget about the engine conversion, its too much trouble to get the electronics right.
the engine currently in the car is the M52TUB25 and included dual vanos would you know were i should get the software to run a M54B30 in a z3?
 
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