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Ive got my rb30 block here all ready to have pistons bought for it however noticed on one of the pistons a marking of 10. Im presuming this means there are 10thou oversized pistons in there.

There is slight piston slap (movement in one piston) so im wanting to know what i can do with this block or is it more worthwhile to simply buy another one.

Sleeving it could certainly be an option however with the blocks around 150 bucks i dont see that being a huge issue.

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If i remember it can be done 3 times. 10, 20 then 30 over.

Myself and Cubes went 20 thou over giving roughly 3.1Lt :whistling:

that sounds very good and means i dont need to throw out my block

will most manufacturers of pistons stock up to 30 thou over as i sem to find 10 being the limit on what i have seen? please give me links to correct me if you can

cheers for the information, certainly helps

ill take my block to the engine rebuilder tomorrow and get them to measure the pistons and see what they think. friends meant to be piecing the engine together for me howver isnt so confident on the amount of movement the pistons are making in the bores.

the next size of piston i can get is .5 oversize which would then be 20thou over meaning ive got plenty of room for movement. now to just figure out whether im going forged or na rb30e pistons and finding the part numbers (a small mission)

Edited by SirRacer

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