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EJ251 performance gains?

rpholz
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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so i have a phase II EJ251 that i will be swapping into my 89 XT and was wondering since i have it torn down right now if i would see any gains if i get the heads milled down? and what would be the safe amount? i was already planning on taking the flywheel down to a shop to get that resurfaced and lightened which also leads to the question can i use an EJ18 flywheel and what would be the most i could get lightened and still keep it drivable?

 

appreciate any input

_Ryan

  • Author

lol, 10-4

 

another question has anyone put a ej22 style tensioner on an ej25 and if so did you run into any issues with the belt?

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