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1987 944 Piston swap

Engine

Vehicle Information: Model(924/944/968): 924S; Year: 1987; Body Type: Coupe; Total Mileage: 117xxx;

If 88 10.2:1 pistons are installed on an 87 924S will the ECU/DME need to be an 88 unit or can the 87 ECU be used? Does the CR change A/F ratios and if so will the engine run rich if the 87 ECU is used?

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