Dry Sleeved vs Wet Sleeved blocks. Help?

[PureVenom]

I am looking at some short blocks for when I do some future upgrades. They offer a dry sleeve and wet sleeve option. What exactly doe these mean? and are there any advantages in either one?

[Thomas91169]

i believe, not 100% sure, that a "Dry Sleeve" is a machined piece of metal that slips into the block. a "Wet Sleeve" is like a cement that they pour into the cavities which hardens.

i used to see alot of honduh's buy the sleeves that slip in, when they wanted to run higher than 10psi on their motors, and a few times now ive seen where they mixed up some shit, poured it into the block cavities and were good to go.

[wrecked2001]

I think "wet sleeve" blocks the actual Iron cylinder liner is surrounded by coolant. In a dry sleeve block the Iron cylinder liner sits in a bore. Like the the 4.6 aluminum blocks.


Wet sleeve.

Dry sleeve.

I think they are also referred to as closed deck and open deck. Someone correct me if i am wrong.

[jimmy_beaner]

so the advantage of the wet sleeve is that it keeps the cylinder cooler?

[PureVenom]

Quote: Originally Posted by jimmy_beaner so the advantage of the wet sleeve is that it keeps the cylinder cooler?

That is my guess because the sites I am looking at say don't run over 20 lbs of boost on the dry sleeve...

But, I am looking for the benefits of going with one over the other as there is about a 1k difference in price.

[jimmy_beaner]

Quote: Originally Posted by Smurfin That is my guess because the sites I am looking at say don't run over 20 lbs of boost on the dry sleeve... But, I am looking for the benefits of going with one over the other as there is about a 1k difference in price.

would the wet sleeve also have the advantage of the air not seeing a hot surface until ignition? That would kind of make your boost a little more than on the dry sleeve, wouldn't it?

[wrecked2001]

Quote: Originally Posted by jimmy_beaner so the advantage of the wet sleeve is that it keeps the cylinder cooler?

Yeah, but they have a problem with distorting, warping and loosing head seal at high boost pressure. That's why they are making aftermarket closed deck (dry sleeve) honda blocks for high boost applications. Wet sleeves are cheaper to manufacture that's why most if not all import engines use a open deck design.

[jimmy_beaner]

Quote: Originally Posted by wrecked2001 Yeah, but they have a problem with distorting, warping and loosing head seal at high boost pressure. That's why they are making aftermarket closed deck (dry sleeve) honda blocks for high boost applications. Wet sleeves are cheaper to manufacture that's why most if not all import engines use a open deck design.

yeah, just trying to understand, but I think I got it. I'd think it'd be pretty easy to blow those sleeves apart at 20 psi though.

[wrecked2001]

Quote: Originally Posted by jimmy_beaner yeah, just trying to understand, but I think I got it. I'd think it'd be pretty easy to blow those sleeves apart at 20 psi though.

I think i am correct, but do some more research.

[PureVenom]

Quote: Originally Posted by wrecked2001 Yeah, but they have a problem with distorting, warping and loosing head seal at high boost pressure. That's why they are making aftermarket closed deck (dry sleeve) honda blocks for high boost applications. Wet sleeves are cheaper to manufacture that's why most if not all import engines use a open deck design.

I think you might have that backwards, but I am not sure. According to vtengines.com...

Quote: VT Machined Cobra Blocks: 3.700" Dry Sleeved Block $1195 with customer supplied block 3.700" Wet Sleeved Block $2495 with customer supplied block Final hone will be required. This is just inserting the sleeves. We do not recommend more than 20psi on a dry sleeved application. The Darton MID sleeves have been tested to 35psi, and allow the motor to run cooler than the dry sleeve setup.

Kind of makes it sound like wet sleeve is better for higher boost.

[Thomas91169]

ACURA BLOCK SLEEVING, HONDA BLOCK SLEEVING

little info on the process of "sleeving" a block. its a "open deck" configuration on them honduh motors(which is why they are so frail if youre planning on running boost). the coolant runs through the space between the itty-bitty cylinder walls and the main block. sleeving is the process of taking down the preexisting cylinder wall, and installing a sleeve into the block that is stronger, and then drilling passages for coolant to still do its job.

Diesel Engine Cylinder Sleeve or Bore -  Engineers Edge

little more info.

[wrecked2001]

Yeah, i think i got it backwards.

[STEVE]

Um pm corey the link to this thread and be done with it.

[KFP]

A wet sleeve is that that touches the coolent. The water jackets that are filled with coolant the walls are like cut out so the coolant can cool the sleeves. Since the coolent is able to touch the sleeve it's called wet. Now the dry sleeve doesn't touch coolent far as I know. I could be wrong, I checked my note book and I have everything else but these sleeves written down and I don't have my text book on me. The difference between them other then wet and dry is thickness. A wet sleeve (if remembering correctly) is thicker then a dry one and a dry one is thinner to help deal with heat. Thinner would explain why they aren't able to handle all the boost. Suck if your sleeve shattered because then it would tear up your engine pretty bad. Tomorrow I'll go threw the text book and note that section in my note book and come back and type up every single info on it.