1UZ max bore?

[JDMfantasy]

I know this has been talked about many times before, but I can't seem to come up with anything solid when searching. I've found 87.73mm in one thread, and .10mm over in another.
I'd like to bore the motor slightlly without sacrificing any block strength. I know the liners are thin...what do you guys think?

 

[Lextreme II]

When we ordered the Group Buy pistons few months ago. We were very much concerned about the bore. We finally convienced only .010" is the max. However, few weeks ago i took my 1uzfe engine to a local performance engine builder. I asked him the same question. He stated that it can take .030" over bore. With .010" over bore, its very difficult to bore and hone because the wear of the sleeves.

From my personal experience, .020" is very safe and its almost a must for aged sleeves. The link below might help you out.

http://www.lextreme.com/3uzblock.html

 

[djr48312]

No one sleeves these blocks? The 2uz uses a 94mm bore for it's 4.7L. If you could sleeve the block to 94mm you'd have 4.7L. With an additional 10% of stroke you would be 5.2L.