Overbore questions ->

[Back2Mustangs]

I'm about to have an '01 Cobra block machined for a build up and I have no idea by looking at the cyl walls to know whether they will need to be bored. If the cylinders need to be bored, will they do a .020 overbore? I'm guessing .030 wouldn't be needed unless the cylinders were really worn out? I don't know. If the cylinder walls aren't that worn, will they even have to bore them? If they only do a .020 overbore does that mean I will just have to run bigger rings or are there actually .020 over pistons (3.572)? This motor will be under about 15+ lbs of boost.

And also, what is the point of sleeving these aluminum blocks?

 

[DBMSTNG]

you'll want to bore the cylinders no mater what to fit forged pistons. standard for the 4.6L engines is .020". sleeving is only needed if you want to make the bores larger than .020" oversize.

 

[Back2Mustangs]

That's what I needed to know. Thank you very much!