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ECU upgrade performance

Does anyone know how much differance an ECU upgrade ( e.g JWT ecu ) would make to the 0 - 60 dash time on a Zed over stock? Has anyone put this to the test and timed their car?. Which ECU upgrade would you guys rate as the best / worst ( time for a few arguements!! )?

 

seez ya!

 

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    One performance comparison i have noticed is that they go a lot faster without modification when you come to sell the old girl. just a thought!

     

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    Glad to be joining in the ECU debate.

     

    Has anyone heard of a Dinan chip?? They state a 25-30hp gain.

     

    Are these any good or do they come under the superchips league?

     

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