Ej257 short block

Old 12 April 2019, 05:51 PM
stevie turbo
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Default Ej257 short block

Hi can any one on here point me in the right direction or have done this,

Im looking to get a new oem subaru sti ej257 block,and was hoping as you can in america replace the very poor pistons in the block with good quality forged 2618 ones.

I carn't find anyone in uk to supply the type A and B pistons that will replace oem ones these are fitted to get the correct piston to wall clearance for correct operation, as just putting a drop in forged piston may be a little loose and to get the approx 3 thou gap required.
The reason for doing it was to have a new oem block with uprated pistons and without splitting a new block and a cheaper option to buying a rebuilt block from a company and less hassle.
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Old 12 April 2019, 07:24 PM
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As performance should be able to answer your question
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Old 13 April 2019, 09:55 AM
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the block requires stripped and honed to get the correct clearance due to not only differing tolerances but the likely hood of bore ovality even on new blocks!!
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