Sleeves?

[JohnD1079]

ok ive been reading up a lot, and i noticed that once people start making a lot of HP like 300hp and up, they say to resleeve your sleeves or get new sleeves. my question is what are sleeves? i asked one of my cousins that reads up and cars a lot, and he had no clue what i was talking about. I know its probably the dumbest question bc its probably obvious. but, no question is a dumb question, especially in the beginners forum

[newtuner7]

the innermost part of the cylinder wall its wat the piston sits inside

[mozzandherb]

Re-sleeving for high horsepowered cb7's are more common among the people who have h22's. The reason being is that the h22 sleeves are made from FRM (fibre reinforced material) and are not compatible with forged pistons which are used to lower the compression with boosted setup's. But that does not mean you have to re-sleeve when boosting an h22, I havent, but I'm only running at 7lbs of boost. If I ever wanted to run more boost, I would either re-sleeve the block and add new rods, pistons and head studs, or there are the Mahle Gold's which apparently are some pistons that are compatible with the h22 FRM sleeves because they have some type of coating covering them which doesnt damage the stock sleeves

[deevergote]

Re-sleeving for high horsepowered cb7's are more common among the people who have h22's. The reason being is that the h22 sleeves are made from FRM (fibre reinforced material) and are not compatible with forged pistons which are used to lower the compression with boosted setup's. But that does not mean you have to re-sleeve when boosting an h22, I havent, but I'm only running at 7lbs of boost. If I ever wanted to run more boost, I would either re-sleeve the block and add new rods, pistons and head studs, or there are the Mahle Gold's which apparently are some pistons that are compatible with the h22 FRM sleeves because they have some type of coating covering them which doesnt damage the stock sleeves

You nailed it


Look into companies like Darton and Golden Eagle for sleeves. They're known to be some of the best. Benson also uses Darton sleeves made to their own specifications, I believe... Considered some of the best.
Resleeving a block usually costs about $1000 or so. That depends on what you have done, and who does it.
If you're going to go for a large overbore, resleeving is a good idea. Turbo? Resleeve it. Stock bore NA with an H22? Stock FRM sleeves are probably better (they've got good cooling properties, and are quite strong... people seem to be under the impression that they're weak)

Some people will suggest a "block guard" as a cheaper alternative to full sleeves. Those people don't know what they are talking about. The block guard will cause warpage in the cylinders.

[mozzandherb]

Agreed the stock sleeves of an h22 are not weak, I believe the S2000 use the same material for their sleeves.