hey guys,

so ive been stuck for a few months now on what to do.
everyone is telling me different things so i almost just gave up and wanted to sell the thing.

heres the deal.

i bought my integra from a kid that wanted to boost it but never did.

9:1 CP pistons 83mm
eagle rods
type r cams and springs
70mm tb
skunk 2 intake manifold

and a few more things done to the car that dont matter for this question.

the kid never got the head resurfaced so it needed a head gasket and to be resurfaced when i purchased it.

the engine it about to go back in and im going to finish the build and turbo it, but i dont know if i can run more than 10 psi on this bore with stock sleeves.... or if i should take the time and money to sleeve it. I have decided against the block guard so thats out of the question.

let me know what you guys think!

 

From what I remember the absolutely biggest bore size for stock cylinders is 82mm. Anything bigger and it is dangerously thin and sleeving would be warranted.

Honda states that cylinder liners over an 81.25mm bore are too weak and the block should be replaced. Hope that helps. It could very well be true, or it could also be a business tactic to sell more RDOT blocks... or it could be a combination of both where the truth is present but the statement gives the blocks a huge safety margin that doesn't tarnish the whole Honda/Reliability reputation.

Take it for what it's worth... Hope that helps.

 

82mm for n/a
81.5mm for boost (unless you have css then i think they say 82mm)

no way in hell i would do 83mm.

is the block already assembled and the pistons are used? i would sell the pistons, get a new block and some 81.5mm pistons and re use all the other parts. fyi you dont want to set the piston to wall less than .0035--.004 with the cp pistons.

also keep in mind about stock map sensor that you always want to run 1 or 2 psi less than the sensor can read so your boost cut can function properly.