H22a questions

[MCNELLY]

i am doing a swap and need help with the H22a! i bought a OBD1 head and the cams and block with a slightly melted piston.. plan on honing it out. im doing a high compression build, im going skunk2 valves/spring. nappon pistons.

my questions are what size of pistons do i use? i seen somewhere that the blocks that have "BBBB" are 87mm? does that mean i need the 87.25mm so it fits after its honed?

what size of injectors do i use?

can the F22 fly wheel, T bracket, intake manifold be used?

thanks in advance

[deevergote]

Honing FRM sleeves is difficult, and if the sleeve has been damaged, it may not even be salvageable. Are the pistons you're using going to be compatible with the FRM sleeves? If not, you can't use them.
If the pistons are compatible, then wait until you hone the sleeves. Get them in proper condition, and measure.

You will need 345cc injectors from an OBD1 H22A.

You cannot use your F22A intake manifold. It won't fit, and it would choke the H22A if it did.
The F22A flywheel will fit just fine, however. H22A and F22A clutch and flywheel components are the exact same size.

[MCNELLY]

The Nippon pistons description say they are for the prelude/ accord. H22/23 f22 motors. The sleeves pass the "finger nail" test the only bad spot is where one of the pistons started to melt to it but it's not to bad.. Since honing is harder would it be best to mill it? That's a recommendation from a buddy.

To read more bout pistons go to eBay and look for h22a Nippon type S high compression pistons.

What about the back T bracket or do I need the preludes

[AccRod91ex]

Frm sleeves require a special honing process. You don't leave the usual cross hatch pattern. They should have a near mirror finish. You should have them measured before you buy new pistons and they may just need a rehone and have new rings re gapped for proper sealing before you go oversized. You can reuse your accord mounts on the h22a. I will be performing this swap around March. Gonna collect everything I need before attempting this.

[deevergote]

Honing and milling are two completely different processes. Whatever friend suggested milling... be sure you don't take any automotive advice from him in the future! Milling typically refers to removing material from the bottom of the head. Usually just to make it straight in the event of heat-related warping, but it can also be done as a ghetto way of raising compression. It is something you would be wise to avoid unless you understand it thoroughly, and have a specific need for it.

Take the H22A block to a shop. I've been working on my H22A since 2003, and even I wouldn't attempt to hone it myself. Find a shop that is familiar with FRM sleeves, and have them hone it for you. If the scratch is too deep, it won't be able to be fixed.

The fact that the pistons say they're for the H22, H23, and F22 Prelude engines scares me a bit. H22 and H23 are both 87mm bore with FRM sleeves, so that's ok... but the F22A has an 85mm bore, with iron sleeves. Very different, and it requires different pistons than the H22 and H23 need. Pistons made for use in iron sleeves are not compatible with FRM sleeves. Be SURE your pistons are compatible with FRM sleeves before spending your money.

What bracket are you referring to?

[MCNELLY]

The pistons say for f22 if you bore .20 over? So idk bout that..

About shops, if you watch street outlaws the shop that works on Farm trucks blocks is here in my town so I should be good in that area?!

The back mount next to the fire wall.

[deevergote]

The back mount shouldn't need any changes unless you're swapping from auto to manual. If you have an EX model with the hydraulic mount, it's probably easier to switch to a standard mount from a LX or DX.

From what I've read, Nippon is an OEM supplier, so they SHOULD work with the FRM sleeves. It might be smart to contact the seller to be sure, though. I just sifted through a metric fuckton of bullshit. It's amazing how many "experts" there are on various forums that know absolutely nothing about these engines!

As far as the shop goes, just because they're a well known and experienced shop doesn't mean they're familiar with FRM cylinder liners. Ask. If they don't give you a satisfactory answer, walk away. FRM is relatively uncommon. It's only used in the B21A1, C32B, H22A, H23A, F20C, and F22C. I believe Toyota and Porsche use something similar, but not exactly the same as the Honda sleeves.
In other words, unless a shop as the knowledge and tools to PROPERLY work with these engines, they have no business working on them at all. At best, the shop may destroy your block before they even get it back together. At worst, they'll manage to get it back together, and it'll grenade on you shortly after.

This is one of those things that you'd be wise to educate yourself on before shopping for a professional. You'll need to know enough yourself to know when someone else is full of shit. I made that mistake when I paid a shop to do my swap back in 2003... and they said "sure, we've done plenty of swaps!" It took two weeks and $1800 for ME to teach THEM how to do my engine swap. Nearly 12 years later, I'm still finding and fixing little halfassed things they did. I went into it completely green. I came out of it knowing a lot, and I learned that professionals don't always know everything. I just did it the wrong way... and it cost me a good deal of money (the initial quote was $500.)

[Jarrett]

The pistons say for f22 if you bore .20 over? So idk bout that..

About shops, if you watch street outlaws the shop that works on Farm trucks blocks is here in my town so I should be good in that area?!

The back mount next to the fire wall.

.020" is .5 mm. 85mm plus .5mm is 85.5mm, not 87mm.

That shop, however famous it may be to a niche group of people, likely has zero experience with honing FRM sleeves. You want a shop that specializes in Hondas, Porsches and some motorcycles.

The "T" bracket currently in your car is reusable as long as you're not going from an automatic to a manual. Other than that, if you're not changing the rear mount itself, the "T" bracket stays the same.




Edit* Sorry, didn't see you'd already responded. I left the window open for too long before actually submitting.

[deevergote]

Hey, at least I was right!

I just looked up an auction for Nippon pistons on ebay, and they say you'd need to bore an F22A to 87.25mm to use them. I guess that means that particular set is for a .25mm overbore on the H22A. And a 2.25mm overbore on an F22A sounds like an absolutely AWFUL idea.

[MCNELLY]

Hey, at least I was right!

I just looked up an auction for Nippon pistons on ebay, and they say you'd need to bore an F22A to 87.25mm to use them. I guess that means that particular set is for a .25mm overbore on the H22A. And a 2.25mm overbore on an F22A sounds like an absolutely AWFUL idea.

So don't get this type of piston? What type do you guys recommend on using?
I'm asking about this bracket cause I'm putting this in another car not a accord. I figured y'all would know more about this motor

[deevergote]

Nobody is saying not to get it. We're saying you should verify that it is compatible.

Good luck.

[MCNELLY]

*
Yes they are 100% compatible as long as the block is honed according to the specs in the factory service manual for FRM Cylinder Honing.

That is what the seller had to say

[MCNELLY]

i took the block to aem shop and he told me i would be looking at about 550-600$ worth of work! to remove and replace sleeves. the spot is not bad. since they aren't steel and FRM that would be my only choice! is that true or can these sleeves be fixed with out replacing?

[deevergote]

Is the damage so severe that the sleeve must be replaced? If so, then yes.