83mm Pistons in a JDM B20A Block

[fmn716]

HI Guys

searched around for this but I couldnt find any answers so maybe you can help

found this thread but the answer is not there

https://www.3geez.com/forum/showthread.php?t=64992


Anyway so I know a few ppl on pp.com are running b21 (83mm pistons) in there 3G lude b20a's

Now I would like to know can I bore out my block to 83mm and still run high comp pistons or will the block walls become to weak ?

Thanks for any input

[MessyHonda]

hey nice to see you here. I had my b20 bored out to 81.5. its much easier to run b16 pistons

[fmn716]

haha still need to pay the balance on the intake manifold pm me how much I owe you again
been a while and I totally forgot about it lol

The reason I am looking at boring it out to 83mm is that I can get CA18 pistons for a good price

The only thing I am worried about is weakening the block to the point of failure

[gfrg88]

Why not run b16 pistons instead? You can find them cheap too

[fmn716]

I have had a look at the rs machine pistons but those only go to 82mm and then jump to 84mm

[gfrg88]

why not 82mm? And there's some 83mm out there also..

[fmn716]

I am kinda keen on those pistons as they per the price