I got a spare d15b2 for my 91 hatch. I was wondering if its possible (and worth it) to bore out the cylinders to make it a 1.8 liter. And then just use a larger set of pistons and better rods. What do you think, waste of time or ??

 

you won't be able to get 1.8l out of the the 1.5. if you did you wouldn't have any sleeves left. i would say it's not worth it cause the only rods made for the 1.5 are from crower that i know of and they aren't the econo's either. you would be set back like $700 for them.