boring out a b18 block

[y2kg0p317]

i plan on boring out my b18a block and was wondering what is the max it could b bored without sleeving it?

 

[boostin4fun]

I would not go more then .20 over on a factory block regardless of what any one says. It you are planning on running alot of boost I would recommend .10 pistons or aftermarket sleeves. If you are running all motor go .20 over for that little bit of extra power.

 

[phunky.buddha]

Typically 1mm without boost, .5mm with. You're not going to gain that much displacement by boring out the block without a sleeve job.

 

[y2kg0p317]

thanks ppls, decide to just buy a block with it done to it. worked out to be much cheaper.

 

[johnercivic]

I would not go more then .20 over on a factory block regardless of what any one says. It you are planning on running alot of boost I would recommend .10 pistons or aftermarket sleeves. If you are running all motor go .20 over for that little bit of extra power.

Not to nit pick, but I think you mean 0.020 over and 0.010 over?