I am going to build a B18a for a integra, It will be a turbo motor, i was wondering if anyone had any helpful tips, i have built a motor before but it was a big block chevy, and i am sure honda motors are a little different. Other than the tips, i was woundering what i should do about the cylinders and pistons. the pistons i am getting are going to be JE and they will be low compression. As for the cylindder walls, i do not think boring it out is a good idea, i was thinkg about a hone job and using the stock diameter pistons. Any suggestons????

 

why not contact endyne about his roller pistons. heard there realy good and pick up a set of the eagle rods while your at it. i'm going with eagle rods after seeing and article about the progress civis that ran at the salt flats over 150mph with eagle rods. other then that if the owner is realy serious about the engine then i would suggest gettin the cylinders sleeved and block gaurded.

 

when refreshing a motor, it is a good idea to go overbore. This does two things:
1. allows you to clean up the walls if there are any marks or damage.
2. allows the motor to breathe better by giving the valves more room.

Another worthwhile investment would be a z10 main girdle.

 

ok now i gotta disagree with #2 there. how would an overbored cylinder help the valves breathe better? i would thing head work/valve stem work would do this. and if he's going to hone the walls that would clean them up. an over bore would allow him to use bigger pistons thus increaseing displacement slightly. this might be good for n/a, but he mentioned he was going turbo. i would think keep the bore (80mm???) and get lower c.r. pistons? but thats just my thoughts. i could be wrong.

 

Its possible sgT meant that if you use a bigger bore piston, the valve reliefs can be moved back" away from the valves...therefore creating more "room" around the valves.

I dont know..I was trying to figure out the same thing.

 

ok...but what if you used oversized valves?? then what? lol. i'm still thinking that one through.

 

forgive me, i am still sick and my brain is a bit "off".

I think it was probably poor wording. using overbore pistons creates more
area around the valves which gives more space for air to flow. You could probably
say that this is a displacement issue, but the increase in displacement
is minute.

I could probably explain this a lot better if i were at 100%.