h22 crank, rods, pistons in F22?

[Pandemic]

Just wondering if it'd be possible to use an h22 crank, rods, and/or pistons in the F22? would using any combo of the above yield any improvements?

[ACC0RD22]

Im 99% sure the crank fits, but no clue about the pistons and rods. I know, if the crank were to fit, it would destroke the f22 to about a 2.0L

[wed3k]

it will fit but the stroke is too short on a h22, as well as the rod.

the bore is a 87mm and the furthest a f22 block would go without sleeving is a 86mm bore.

h22'ers put the f22 crank and rods to stroke their motors but it would be pointless vice versa.

[Pandemic]

I thought compression was higher in the H22?

[GhostAccord]

Yes the H are higher compression but;

Stay away from the H crap. F22 crank has a longer stroke and the F22 rods are the same rods that are used in the H23. If your looking to use any OEM forged 87mm pistons your going to have to sleeve your block. And I would suggest the 2008 Accord LxP K24 pistons, they are the same compression height (+/-0.5mm) That is manageable with a 3 layer head gasket and they are also 10.1:1 CR. To run the 31mm CH H pistons you would have to machine the head.

[Pandemic]

Wouldnt a higher compression mean longer rods?

[C91BLX7]

Wouldnt a higher compression mean longer rods?

yes and no, longer rods would mean higher compression, or taller pistons.

[GhostAccord]

Not exactly.... A higher compression can be the result of a few different factors. Piston type, Dome = higher compression Flat Top (0 or -) & Dish = Less, combustion camber CC's, rod length & stroke.... There are a lot of factors that come into play when it comes to compression ratio.

If you want to know more do a search for compression ratio on google

Here is a place to start your research;

http://en.wikipedia.org/wiki/Compression_ratio

[Pandemic]

but it all makes sense. more volume at tdc = less compression. H22 compression is higher than f22. So, I would think h22 crank, pistons, and rods would increase compression on f22...

f22 crank, pistons, and rods in an H22 would lower compression... and create a TON of possibilities for turbo applications.

This is just how I understand it, but I think i'm wrong based on what I've read so far.

[C91BLX7]

No The H22 rods are shorter, thats why the pistons are bigger so that it will still be 2.2L

[wed3k]

meaning that when you install them into a f22 block, the piston (if one put a 86mm piston or 87 into a sleeved block) would sit furthur down the hole.

[Pandemic]

So how is the H22 compression higher?

[wed3k]

So how is the H22 compression higher?

i dont think they use a dished piston but probably a flat top design which nets around 9-10:1.

[Pandemic]

So, in theory, you could use the h22 crank, h22 rods, and f22 pistons. This would drop the CR below stock f22. For that reason, you could turbo the hell out of that engine and get a lot more hp.

... or am I wrong? :P

I'm not LOOKING to do this. I'm just having a convo about this so I get an idea of all of the aspects of bottom end internals.

[wed3k]

8.8:1 compression ratio is perfect for turboing but for sake of conversation the setup would work.

as for getting mroe horespower, you want as much compression as possible without the risk of increasing the chance of detonation.