b18c block question with pic- do you think this is safe?

[MrJDMCivic]

so 84mm pistons arnt any good at all. i guess im gonna have to get 81mm pistons.

[tinkerbell]

did you not read the whole thread?

or is it that you dont want to re-sleeve it?

[MrJDMCivic]

shit sleeving cost over 2000, dont wanna spend that type of money only on a block. i think im better off getting 81.5mm pistons and boring it out to 81.5 specs.

[tinkerbell]

how much did you pay for the posted block?

[MrJDMCivic]

bought it off this guy for 500, bored already to 81.25mm,. so looks like im gonna have to buy 81.50mm pistons and bore it out to that so the sleeves dont break.

[tinkerbell]

sound like a good plan...

i know someone who is running 82mm pistons with stock sleeves, but i think the block was sent to Japan to get it bored...

[MrJDMCivic]

also if i bore it out to 81.50mm do i have to bore out the head and the headgasget?

[tinkerbell]

IMO no, you don't have to, but other peopls may say that you should...

[MrJDMCivic]

so the standard headgasget with standard head will fit perfectly and have no clearence issues being the pistons are 0.5mm bigger

[tinkerbell]

no, 'perfectly' is the wrong word.

but there should be no 'clearance' issues, what pistons are you going to use? have you actually looked at them (or a picture of them?)

the reason why people might suggest boring out the head and HG is not for clearance concerns, more detonation 'hot-spot' concerns...

[MrJDMCivic]

ahh., im getting je pistons. what do you think about them? also they are meant to have a compresion ratio of 11.5:1

[tinkerbell]

i think they are as good as any other forged piston in that price range...

11.5 is *only* ITR compression, why not go with 12.5:1?

do you have a ECU to tune the engine?