its not a spun bearing or ring you need to wory aboutwith a b20vtec , its the stock sleeves.

disregard this if youre going golden eagle or aebs.
one thing you should remember though however is if you run 100 octane which is only like 1.85-1.90 a gallon you will be perrectly fine with a compression ratio of damn about 13:1 with good timing.

its flooring it at 2000 rpm in 5th gear where you'll have trouble.