EJ25 questions

COSTIGAN86

COSTIGAN86

New member
Are there any differences between a naturally aspirated 2.5 shortblock and a turbo 2.5 shortblock? I know the compression ratio is higher on the NA, but I'm guessing that the difference is in the heads. I am asking because I can get a 2.5 core in need of rebuilding from a Saabaru. Its always a good idea to keep an extra around just in case
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well the block on a na is open deck aka has 2 places on the block hold the cylinder walls from moving. the turbo is called semi closed because its held in 4 places other than that the oil pump and water pumps are different. the rods on turbo are forged units

 
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