H2B

Which H Series Block Would Be Best For ALL Motor? Planing To Do H2B. I currently have an H22A4 Block just sitting but want to know which block would be the best.

TracerAcer2.2L

Your current block is great, IMO. The FRM liners in the H series supposedly have better friction (or, anti-friction) properties than regular block sleeves. Everyone rags on FRM sleeves, but little do they know that even some Porsche's use this technology. They are lightweight sleeves that can hold the power.

That's as far as sleeves go. What year is your motor? I believe '97 and up are open deck blocks, which is terrible for boost as the cylinder walls are thinner. However, it has better cooling capabilities, and is my belief that it may lead to more HP and better dependability in the long run for the N/A application. Furthermore, the '97 and up model engine uses 55mm mains, which is better for high RPM capability.

I don't usually do this for noobs asking such open ended questions but I'm feeling generous today

chrisnick

55mm mains also allow for the use of a 97mm crank from an F23!

the171

Ill argue that the open deck block is not weaker. The lack of deck surface in the later engines does not make the cylinders thinner or less strong. Look at the mahle piston thread... There is some high hp stock block info there from any H motor. 500hp and beyond is normal. Similar to s2000 and nsx engines.

The H22A4 is one of the best H blocks to use because it accepts more cranks, the crank itself is beefier, and because it has arguably better cooling ability. For stock engines, the H23A probably makes the most power by a little bit. But they are all good and fun to use, if its what you got, run it.

While resilient, One of the crappier things about the H is the lack of pistons choice. Sure the f23 crank is cool but there is no piston available for that size. At least, It would be custom order and not cheap. And then there is the problem of fitting the specialty piston. Not many people have experience boring/ honing this material. This is probably why there are less H builds. Often overlooked is the G23... Its got similar potential to the H but the less exotic block offers unlimited piston choice.

TracerAcer2.2L

Good info 171, I didn't know that about the strength of the block.

While there may be lack of aftermarket piston choices, there are all sorts of OEM choices all resulting in different compression to suit your build.

I wonder if OP will ever respond back lol

manasel

you could easy use the f20-f22 block,stock sleeves can handle up to 450hp

GhostAccord

Kind of hard to use an S2000 F20/F22 mated to a b series trans. They are completely different from the H/F Series engines found in the Accord & Prelude. They are more along the lines of the Kseries engines. They rotate in different directions!

manasel

i was talking about the old f-series mate!

GhostAccord

Oh got ya.... F20B & F22B. ... know them very well👍

H2B

Sorry For taking so long to reply and thank you for all the information it was very helpful! Do you guys think it would be worth resleeving the block to make the bore size 89mm? I know that the stock bore is 87mm so its not really that much of a difference. Thanks again!

H2B

And is anyone familiar with CP Forged Pistons? Im looking at a CP forged 87mm with 11.5:1 compression. From what ive read they are great pistons but i would like to get your take on them.

COM2

Yes, CP is a solid company. There are a few quality choices, but CP definitely is on the list.

GhostAccord

89mm is a good round number for a sleeved H series, that's the bore I am going with for my similar F series build. Don't kid yourself, it may only be 2mm but it goes a long way.

Are you going to be sleeving the block or not? If not are the CP pistons FRM compatible? CP is a good company. However, if the pistons are not made for FRM sleeves it won't matter who makes them.

Edit.
The CP catalog that I have states that the H22 pistons are for sleeved blocks only.

H2B

After more research my finally decision is resleeving the block and boring it to 89mm. im gonna throw on wiesco pistons with 11.5:1 comrpession ratio and manley rods. Anyone familiar with the evolution h2b kit?

TracerAcer2.2L

Here is the gist of most Evolution H2B reviews:

Pros:
- The engine is positioned lower, so there's no need for un-aerodynamical (and ugly) hood risers
- There are no potentially dangerous flywheel spacers
- There is not as much grinding of the block as with the QSD kit
- It's a very well made kit

Cons:
- The engine is positioned lower, so there is less header/oil pan clearance. There is also improper axle alignment (although I haven't heard of this actually causing a problem)
- Quite a few have reported shifting issues with this kit. I don't remember if it is because of the transmission being in a different position or the slave cylinder not quite lining up right or what, but it's there