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? about h22a1 and h22a4

 
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Old 10-13-2008, 07:03 PM
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Icon5 ? about h22a1 and h22a4

i was wondering if theres a difference in internals between the h22a1 and h22a4. im planning on buying Eagle Rods, Skunk2 Stage 2+ Camshafts, Skunk2 Cam Gears, KMS Valvetrain package (titanium retaineirs, valves and dual valve springs), and Cometic Headgasket for my h22a4. but the guy that i was going to buy this stuff off of has a h22a1. is there a difference or is it ok? help me out...thanks
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Old 10-13-2008, 10:10 PM
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Re: ? about h22a1 and h22a4

some one?????????
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Old 10-13-2008, 10:41 PM
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Re: ? about h22a1 and h22a4

Firstly - bumping your thread less than three hours after you started it achieves nothing but making you look like an impatient git.

H22A1 and H22A4 are pretty much the same. The gear will be fine.

Oh, and there's a little red button up there on the top of the page under the masthead, it says SEARCH. Please use it, as this has been covered many, many times.
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Old 10-14-2008, 12:33 AM
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Re: ? about h22a1 and h22a4

Dont be rude he was just asking some people as myself dont have much time to search the web for hours to get our answer.You can simply just help the person out as im sure you have asked something before also. hate me for saying this to you yourself but I mean seriously between school,work,the my girl, and the work from school I have the same problems with lack of time for the car stuff.

Im sure if you take a quick run on google and type in the other one it will explain it to full detail right away.
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Old 10-14-2008, 01:42 AM
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Re: ? about h22a1 and h22a4

Yeah man, H22a1 and H22a4 aren't exactly the same, but the parts you listed will fit just fine for you. As long as you know what you're doing. 0.0
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Old 10-14-2008, 01:57 AM
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Re: ? about h22a1 and h22a4

Some one asked a similar question on Homemadeturbo.com but it reffers to the JDM H22A and the H22A4, for you some info is needed while some is not, I assume you can weed out the unnecessary stuff.


*******EDIT***********

read the entire post and found out that the response below does not pertain to the question, however it is simple good knowledge so I shall leave it.


Quote:
The H22A vs H22A4... Here we go:

The H22A is specifically a Japanese Domestic Market (JDM) engine.

Any H22A made and sold in Japan will bear the H22A designation on the block, and only be differentiated by the serial number. This includes engines that were used in every JAPANESE model of Prelude.

The H22A4 is SPECIFICALLY the engine used in the 1997-2001 Honda Preludes sold in North America.

The H22A4 has TWO variants: The base model block and the Type-SH block. The type SH block is machined to allow the proper fitting of the ATTS unit (Active Torque Transfer System) and the transmission. For swap purposes the H22A4[SH] is useless for anyone with a "normal" or non-SH block.

Basic Differences:

1) The H22A series of engines have higher compression ratios: 10.6:1 and 11:1. While the H22A4 series has a 10:1 compression ratio. All engines require 91 or better octane gas, and this is not negotiable if you have an H22A. Significant usage of non-premium fuel will eventually ruin your rings, no matter how much the ECU retards the timing.

2) The early H22A series engines have CLOSED DECK design, while the H22A4 engines have an OPEN DECK design. The closed deck means that aluminum is cast around the tops of the cylinders with coolant port openings, leaving block-to-cylinder bore contact at the TOP of the block. The H22A4 does not have this. Instead, the cylinder bores are ancored only at the bottom of the block, and the head gasket / cylinder head keep them ancored on the top. Mechanically, the closed deck design is stronger. However, the open deck design allows for superious cooling of the top part of the cylinder bores, thus reducing NOx emissions. Later H22A series blocks are exaclty the same as the H22A4 blocks.

3) Once again, early H22A series engines are different on the timing side of the engine, since the later model H22A and H22A4 engines are OBD2. This means that the oil pump housing must accommodate different sensors that the old OBD1 H22A's don't require.

4) The crank harmonic balancer bolt is smaller on the older H22A's.

5) The intake manifold is an older design on the older H22A's. ...and on the 11:1 version of the H22A (for the 5 Gen Type-S Prelude) the IM is ported and polished at the factory.

6) The Thermostat housing is different on the older H22A's.

7) The distributors are different on the older H22A's.

Cool Most of the older H22A series engines used type A pistons, whereas the H22A4 pistons are the smaller tolerance type B pistons.

9) The older H22A series engines (lets just call them 4th Gen Prelude engines [92-96]) have different oil pans. (The H22A4 and later model H22A units are aluminum and have a transmission stiffener.)

Basically, it's a matter of the bolt on's and the electronic controls... but only when you are comparing a 4th Gen Prelude H22A JDM to a USDM H22A4.
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Last edited by 408Honda; 10-14-2008 at 02:00 AM.
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Old 10-14-2008, 02:13 AM
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Re: ? about h22a1 and h22a4

actually they ARE different. one is closed deck the A1 and one is open deck the A4
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Old 10-14-2008, 02:14 AM
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Re: ? about h22a1 and h22a4

That clears up a lot of my questions. Thanks.
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Old 10-14-2008, 11:08 AM
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Re: ? about h22a1 and h22a4

thanks alot
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Old 10-14-2008, 12:12 PM
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Re: ? about h22a1 and h22a4

The H22A and A1 are the same except for the compression. A1 is 10:1, A is 10.6:1, and a S-Spec A is 11:1. The S-Spec comes with a red valve cover.
Everything else has been said in previous posts.
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