whats largest bore possible

straycat990 · May 21, 2005

I have a 153 block, just how far can this block be bored? it has a 4.004 bore now.

thanks,
David

Big Stu · May 22, 2005

One of my oncenter blocks is 4.040, and I think that is about pushing it. Not much meat left between the water jackets..

steve hughes · May 22, 2005

The only way to find out for sure how much it can safely be bored is to have it sonic checked.

BAGN · May 24, 2005

I've seen 4.060

DR BOOST · May 24, 2005

4.065 on a off center...sonic checked ok

65vette396 · May 26, 2005

My 153 is at 4.025 as we speak. Drew

Mygn421 · May 26, 2005

mine is 4.060 bore and no problems

EightSecV6 · May 26, 2005

I have run one at 4.090, you run out of gasket after that! Be sure to sonic check it!