h22 sleeves
Posted: Mon Nov 10, 2008 9:40 amOk, so i hear more and more about these sleeves and how they dont handle boost well, can anyone elaborate?
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Posted: Mon Nov 10, 2008 9:40 amPosted: Tue Nov 11, 2008 9:36 amfrom a little research the walls on the h22 are too thin and would crack under pressure thats were sleeves come in play
Posted: Tue Nov 11, 2008 3:56 pmThe H22 Walls are also made from a Weaker material then The F22 or the H23. Which is why a H22A Head on a F22B or H23 Block is a Popular Frankenstein.
I don't remember the Exact name of it, But theirs just some coating instead of the steel sleeves in the F22 and H23.
I don't remember the Exact name of it, But theirs just some coating instead of the steel sleeves in the F22 and H23.
Posted: Thu Nov 27, 2008 5:17 pmthe sleeves in a h22 frm sleeves
Posted: Fri Nov 28, 2008 1:05 amso will sleeving the block help? And what would be better sleeving the h22, or frankenstiening it by swapping an h23 block? and what would be cheaper?
Posted: Fri Nov 28, 2008 2:34 amchrono404 wrote:The H22 Walls are also made from a Weaker material then The F22 or the H23. Which is why a H22A Head on a F22B or H23 Block is a Popular Frankenstein.
I don't remember the Exact name of it, But theirs just some coating instead of the steel sleeves in the F22 and H23.
FRM, it stands for Fiber Reinforced Metal. This basically means that the sleeve is not full ductile iron like the previous stronger sleeves of the Honda engine world.
This technology was introduced in 1988 with the introduction of the B21A1, which was included in the Prelude Si (JDM/EDM only).
FRM sleeves consist of a carbon fiber matrix, aluminum alloy, and aluminum oxide.
It is rumored that any type of power adder or forged piston in a engine used with the FRM sleeve will need to be re-sleeved, 95 percent of the people who have built an h22 with cracked sleeves will agree, the other 5 percent have never built a motor strong enough to crack the sleeve.
The following engines were created using FRM sleeves:
-B21A1
-H22A1
-H22A4
-H22A
-H23A
-F20C
-C32B(NSX)
Posted: Fri Nov 28, 2008 2:36 amcheaper? don't boost it, beef up internals like cams. that way you won't blow up your engine, then be SOL.
Posted: Fri Nov 28, 2008 2:47 amJDM3StageVTEC wrote:so will sleeving the block help? And what would be better sleeving the h22, or frankenstiening it by swapping an h23 block? and what would be cheaper?
It would be cheaper just to get a h23 block. But if you planning on making sum serious power like going boost later. I recommend sleeving. Its a bit pricey but it will save your motor.