Engine Boring 94mm

Hello everyone. I got around to finding an old and cheap block ($23)
to try my tools on. I bored it for a 94mm Cylinder. I have a 94mm
cylinder for the measurements and to test the fit. Everything is good.
Is it ok to leave a lip like I did?? or will the 94mm piston hit that
lip? Should I leave it, or bore through.. here's a picture..

http://img487.imageshack.us/img487/8120/p4300093mq0.jpg

<img src="http://img487.imageshack.us/img487/8120/p4300093mq0.jpg">

Has anyone bored a case before? Mine is so slow.. I have to instead
run the drill press down and up abruptly over and over.. I can't just
let it slowly grind.. Is my blade bad?

Thanks!

try asking this on thesamba.com in the high performance / racing forums
alot of machinist frequent that forum alot
> wrote in message
oups.com...
> Hello everyone. I got around to finding an old and cheap block ($23)
> to try my tools on. I bored it for a 94mm Cylinder. I have a 94mm
> cylinder for the measurements and to test the fit. Everything is good.
> Is it ok to leave a lip like I did?? or will the 94mm piston hit that
> lip? Should I leave it, or bore through.. here's a picture..
>
> http://img487.imageshack.us/img487/8120/p4300093mq0.jpg
>
> <img src="http://img487.imageshack.us/img487/8120/p4300093mq0.jpg">
>
> Has anyone bored a case before? Mine is so slow.. I have to instead
> run the drill press down and up abruptly over and over.. I can't just
> let it slowly grind.. Is my blade bad?
>
> Thanks!
>