ok have a b16a block that has been sittin around for a while i now finally built up the motivation to build it up...well i bought some jdm high comp. ctr pistons, and when i looked at the cylinder walls they had rust on the top and inside, its going to get bored out but there is a lot of rust on the top of the cylinders what can i do? Is it too much rust to fix it? Heres a pic please give me some advice...and im new to the area and lookin to meet someone and make some friends who are good with building hondas and stuff..anyways heres the pic....

 

when you bore it, it will take care of all that

 

how much should i bore it out...what size pistons do i need?

 

20 thousands should take care of that, and you would still be able to buy an OEM oversized piston

 

ok well i bought 82mm pistons that should be ok right...or should get 83-84mm instead

 

82mm should be fine, but i wouldnt bore a stock sleeve any further than that, even in an NA application...

 

ok thanks alot for the help i just bought the 82mm ctr pistons today so hopefully itll be ok...i dont want this motor to blow lol should i buy an aftermarket block girdle? what can i buy to keep from going kaboom..

 

There is no such thing as an oem 82mm ctr piston.
The largest oem ctr piston is 81.25mm

Did you buy aftermarket ctr style pistons that are 82mm ?

You won't need a girdle.

If you want the motor to last, simply build it to the factory specs in the helms manual.

 

yeah then i guess they are ctr style cause i requested for 82mm so iknow when it gets bored out the rust gets taken away too

 

Rust is good for an engine. Id let the cylinders rust all the way up then hone it. Rust/oxidation accelerates the molecules in the metal and they tend to compress and make a strongr block. Its much better with cast iron blocks. But the sleeves are cast soo it works well. I always leave my blocks out back to rust up. And yeah never heard of CRT pistons like that. Are they ebay pistons ? and Youdnt need a girdle but They do help in stability. If you plan on revving the crap out of the engine then I would install one. I always use them, peace of mind.