engine change
 

hi all am thinking of fitting a ej25 into my classic next year.will i be able to use my wrx box or will i need to change it

You don't need to change the box. Good idea to change the clutch though. :drive:

Don't "need" to change either but all depends what's going in with it ;)

2.5 is likely to have too much torque for a 5 speed in the long run. It'll fit I had mine on a 5 speed for a bit.

im building a road legal track car. so thats why i want to put a 2.5 in it

I'd do a 2.1 or 2.35
2.5 is not a track engine I d want again

:agreed: 2.35 is the way forward best of both worlds :drive:

My view is 2.5 for road, 2.1 or 2.35 (if you have deeper pockets for track)

My 2.5 is great on the road but on track it's too fragile and doesn't like to be revved that hard. Getting a 2.5 pinned or closed would increase safety margin but the engine would still be about low down torque not really a track setup.

cheers guys. so do you think a ej22 would do

ej22 with a 2.5 crank (needs a rear thrust conversion to fit) with forged rods and pistons will give you the holy grail of impreza engine the 2.35. If I had my time again I'd wait on my rebuild and do the above, C.J did the same having a very good strong 2.5 he still switched to a 2.35 because of the reliability/safety.

going to see if i can get an ej22 then

Friend has some coming in from the states in january if need one pm us