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H23 block with H22 head

 
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Old 06-05-2013, 02:40 PM
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H23 block with H22 head

I was just wondering how simple it is to put a h22 vtec head on a h23 block? Ive been told it can be done but what all would I have to do?
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Old 06-05-2013, 03:05 PM
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Re: H23 block with H22 head

googles first result: H22 DOHC Vtec Head on H23 Block? What Do I Need? Help! - Honda Prelude Forum - Prelude Online.com

but remember that h23 has pretty low compression (specially compared to jdm and h22a4 engines) so its not THAT great swap (h22 cams could need higher compression to make good results)
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Old 06-05-2013, 03:09 PM
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Re: H23 block with H22 head

Ok, what could I do to make the compression higher? And about how much higher would the compression need to be?
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Old 06-05-2013, 03:13 PM
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Re: H23 block with H22 head

h22 pistons, thinner head gasket
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Old 06-05-2013, 03:25 PM
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Re: H23 block with H22 head

Quote:
Originally Posted by M0B5TA View Post
h22 pistons, thicker head gasket
I though a ticker gasket will actually lower compression?
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Old 06-05-2013, 03:26 PM
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Re: H23 block with H22 head

Ok kool man thanks.
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Old 06-05-2013, 03:26 PM
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Re: H23 block with H22 head

Would the h22 pistons fit in perfect?
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Old 06-05-2013, 03:34 PM
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Re: H23 block with H22 head

Quote:
Originally Posted by 4GenLudeLover View Post
I though a ticker gasket will actually lower compression?
sorry i meant thinner. i used a thicker one on my motor BECAUSE BOOST
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Old 06-05-2013, 03:36 PM
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Re: H23 block with H22 head

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Originally Posted by JDM93Sipunk View Post
Would the h22 pistons fit in perfect?
im not sure if the h22 pistons fit perfect on the 2.3 rods but you can find 2.2 pistons cheap and tell us how it goes lol. im using h22 low compression pistons on f22 forged rods
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Old 06-05-2013, 03:38 PM
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Re: H23 block with H22 head

Quote:
Originally Posted by JDM93Sipunk View Post
And about how much higher would the compression need to be?
11 is the highest with oem H22 pistons, mahle has 11.5 and if you sleeve the block you can get even higher ones
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Old 06-06-2013, 04:23 PM
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Re: H23 block with H22 head

The h22 pistons fit in the h23 blocks fine. They are the same. Difference in h22 and h23 are the crank and rods. Stock usdm h22a4 pistons on the h23 rods and crank are going to yield you just shy of a 11:1 compression ratio. Keep in mind this is also going to have your piston to valve clearance at a minimum and some aftermarket cams or change in camshaft timing may not be an option.
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Old 06-07-2013, 12:11 PM
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Re: H23 block with H22 head

Quote:
Originally Posted by M0B5TA View Post
im not sure if the h22 pistons fit perfect on the 2.3 rods but you can find 2.2 pistons cheap and tell us how it goes lol. im using h22 low compression pistons on f22 forged rods
f22 rods and H23 rods are the same. With that being said, H22 pistons will fit on H23 rods. Taller rods will also result in higher compression.
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Old 06-07-2013, 12:13 PM
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Re: H23 block with H22 head

Quote:
Originally Posted by bigblue7t6 View Post
The h22 pistons fit in the h23 blocks fine. They are the same. Difference in h22 and h23 are the crank and rods. Stock usdm h22a4 pistons on the h23 rods and crank are going to yield you just shy of a 11:1 compression ratio. Keep in mind this is also going to have your piston to valve clearance at a minimum and some aftermarket cams or change in camshaft timing may not be an option.
dont forget the H22 also has "oil squirters" for its higher RPM range.
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Old 06-08-2013, 12:15 PM
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Re: H23 block with H22 head

Kool, I really appreciate yalls information and help
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Old 06-08-2013, 12:56 PM
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Re: H23 block with H22 head

When I was trying to do research on this a while ago, it seemed that there was a definitive write-up that everyone always referenced, that has since been taken down.

Here's were it used to be.

Was it ever mirrored someplace?
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Old 06-08-2013, 01:19 PM
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Re: H23 block with H22 head

I dug up a lot of info on this build a while back
Starting my H23vtec build.
I long since abandoned the project due to money, time, and practicallity. But this is good info.
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