slociviccoupe
Well-Known Member
hello, planning on an ej25 sohc conversion to power a pro composites vision. doing the engine build/ rebuild while building the plane. Been doing some research and seems the nitrided sti crank is prefered by auto conversion suppliers. also they reccomend or use the turbo ej257 block because of extra webbing. Are these parts necessary or will the stock sohc ej25 crank and cases be sufficient. Im using the sohc heads because they don't have the headgasket problems like the dohc heads. Most of this info is from maxwell propulsions pages in the experimenter newsletter linked here.
EAA - EAA Experimenter - Optimizing the Subaru EJ25
if these components are deemed necessary im most likely better off just buying a new set of cases, a new crank that is nitirded and cross drilled, aftermarket rods that are already forged and ballanced, stronger forged pistons, and then buy a set of heads and have them reconditioned with stainless valves and new valve stem seals.
just seing if its worth buying a core first that has to be gone through anyways or build one up from parts that would be replaced anyways.
EAA - EAA Experimenter - Optimizing the Subaru EJ25
if these components are deemed necessary im most likely better off just buying a new set of cases, a new crank that is nitirded and cross drilled, aftermarket rods that are already forged and ballanced, stronger forged pistons, and then buy a set of heads and have them reconditioned with stainless valves and new valve stem seals.
just seing if its worth buying a core first that has to be gone through anyways or build one up from parts that would be replaced anyways.