h22a vs h22a4
05-20-2006, 10:30 PM
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Re: h22a vs h22a4 (severen)
h22a- jdm- 200hp 163(or is it 161? who cares) tq- 10.6:1 compression ratio
h22a4 is usdm as is the h22a1. the Euro-r h22 has 220 hp and 167 tq and 11:1 compression. I dont know the difference between the a4 and the a1 though.
h22a4 is usdm as is the h22a1. the Euro-r h22 has 220 hp and 167 tq and 11:1 compression. I dont know the difference between the a4 and the a1 though.
05-21-2006, 06:23 AM
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Re: (mgags7)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 »</TD></TR><TR><TD CLASS="quote">h22a1 & 1997 only h22a4s have 50mm mains
98+ h22a4s have 55mm mains</TD></TR></TABLE>\
I did some reading and found out anothe notied difference between the makes of motors is in the idel adjustment screw....seems to me(what I heard) is that the 91-95 H22s have a screw to adjust the idle..and in the 96+ they switched to a plunger? because the screw design would work its way loose and cause Idle problems and inconsistanceys....okay Im done next topic
98+ h22a4s have 55mm mains</TD></TR></TABLE>\
I did some reading and found out anothe notied difference between the makes of motors is in the idel adjustment screw....seems to me(what I heard) is that the 91-95 H22s have a screw to adjust the idle..and in the 96+ they switched to a plunger? because the screw design would work its way loose and cause Idle problems and inconsistanceys....okay Im done next topic
05-22-2006, 05:16 PM
#33
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Re: (severen)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by severen »</TD></TR><TR><TD CLASS="quote">i wanna know how u had a h22a4 in a 97 they were only in 99-01 the bb6 </TD></TR></TABLE>
h22a4 is 97-01
h22a4 is 97-01
05-22-2006, 05:17 PM
#34
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Re: h22a vs h22a4 (severen)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by severen »</TD></TR><TR><TD CLASS="quote">also base model does not have 195hp that is the auto base stick still is 200hp</TD></TR></TABLE>
who cares?
who cares?
05-22-2006, 06:11 PM
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Re: (severen)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by severen »</TD></TR><TR><TD CLASS="quote">i wanna know how u had a h22a4 in a 97 they were only in 99-01 the bb6 </TD></TR></TABLE>
Many people here need to brush up on some basic Prelude knowlege. Read the faqs section people! I hardly ever start a new thread because most of the stuff I wanted to know off the bat was in the faqs.
Many people here need to brush up on some basic Prelude knowlege. Read the faqs section people! I hardly ever start a new thread because most of the stuff I wanted to know off the bat was in the faqs.
05-22-2006, 06:18 PM
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Re: h22a vs h22a4 (98vtec)
it is not 97-01
http://www.ntpog.org/specs/index.shtml
look there will show u 97-98 and 99-01 have diff engines
http://www.raceseek.com/honda_specs.htm
look there as well they have it as h22a2 though its really h22a4
it is not the same u have a 98 look at ur engine unless u swapd it
http://www.ntpog.org/specs/index.shtml
look there will show u 97-98 and 99-01 have diff engines
http://www.raceseek.com/honda_specs.htm
look there as well they have it as h22a2 though its really h22a4
it is not the same u have a 98 look at ur engine unless u swapd it
05-22-2006, 06:18 PM
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Re: (Televator)
and i dun really care about the 5hp but if someone stats something as a fact and i know its not ill correct it i dont know everything but if i do knwo i post it
05-22-2006, 06:45 PM
#39
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Re: h22a vs h22a4 (98vtec)
ok then if you think the 97-98 motors are different from 99-01 then what do you think the engine code for 97-98 is?
you are making yourself look stupid
USDM OBDI = h22a1
USDM OBDII = h22a4 (even the sh is h22a4)
JDM = h22a
EDM Euro R = h22a2
accord type R = h22a7
comprende? Thanks.
you are making yourself look stupid
USDM OBDI = h22a1
USDM OBDII = h22a4 (even the sh is h22a4)
JDM = h22a
EDM Euro R = h22a2
accord type R = h22a7
comprende? Thanks.
05-22-2006, 06:50 PM
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Oh man...
Guys,
This really is a NOOB thread... and I can't let this go unanswered... at least for the basics.
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 accomdate 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.
8) 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.
This really is a NOOB thread... and I can't let this go unanswered... at least for the basics.
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 accomdate 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.
8) 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.
05-22-2006, 09:19 PM
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Re: Oh man... (gerhard)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gerhard »</TD></TR><TR><TD CLASS="quote">Guys,
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..</TD></TR></TABLE>
Poo I wish somebody had told me that...I was wondering why I go through more oil than a little bit.......expletive oh well I was talking to a friend and he was explaining wiht timing so advanced in my car if I didn't se 92 octane I would have pre-detonation............crap okay well I know now thanks alot for the info
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..</TD></TR></TABLE>
Poo I wish somebody had told me that...I was wondering why I go through more oil than a little bit.......expletive oh well I was talking to a friend and he was explaining wiht timing so advanced in my car if I didn't se 92 octane I would have pre-detonation............crap okay well I know now thanks alot for the info
05-23-2006, 11:52 AM
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Re: Oh man... (NAmodified)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NAmodified »</TD></TR><TR><TD CLASS="quote">usdm blows 
</TD></TR></TABLE>
yeah it sucks making 220whp on a stock us motor with cams
</TD></TR></TABLE>yeah it sucks making 220whp on a stock us motor with cams
05-23-2006, 03:05 PM
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Re: h22a vs h22a4 (xxx99ludexxx)
98+ H22's also use a spring type LMA as apposed to the failure prone hydraulic LMA's found in the pre 98 H series motors (97 H22A4 and 92-96 H22)
All other differences can be explained here:
https://honda-tech.com/zerothread?id=1232811
All other differences can be explained here:
https://honda-tech.com/zerothread?id=1232811
05-23-2006, 07:56 PM
#46
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Re: h22a vs h22a4 (SRBB6)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xxx99ludexxx »</TD></TR><TR><TD CLASS="quote">it is not 97-01
http://www.ntpog.org/specs/index.shtml
look there will show u 97-98 and 99-01 have diff engines
http://www.raceseek.com/honda_specs.htm
look there as well they have it as h22a2 though its really h22a4
it is not the same u have a 98 look at ur engine unless u swapd it</TD></TR></TABLE>
Well if it's in NTOPG then it must be true!! HAHA dip ****
http://www.ntpog.org/specs/index.shtml
look there will show u 97-98 and 99-01 have diff engines
http://www.raceseek.com/honda_specs.htm
look there as well they have it as h22a2 though its really h22a4
it is not the same u have a 98 look at ur engine unless u swapd it</TD></TR></TABLE>
Well if it's in NTOPG then it must be true!! HAHA dip ****
05-23-2006, 08:02 PM
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Re: h22a vs h22a4 (I got the CD5 Jeebies!)
This info is incorrect in that I have a 1998 Base Prelude and my engine is an H22A4. This post says only SH's had the A4. Sorry, just thought I would point that out
01-20-2009, 10:06 PM
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Re: h22a vs h22a4 (I got the CD5 Jeebies!)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I got the CD5 Jeebies! »</TD></TR><TR><TD CLASS="quote">Correct I have the H22a motor it has 200 hp and 161 with a 10.6:1 compression all rated AT THE CRANK!!!!! the reason the H22a4 motor sucks (imo) is ATS which is...god I forget....ummmmmmmm Auto Tourqe sumtin....**** anyhoo has alot of limitation on what you can do to that motor...
Credit goes to accordinglydone.com for the stats.
H22A4 Prelude SH 99-01 200 156 10.0:1 87 90 DOHC VTEC 2157 USDM
</TD></TR></TABLE>
Wrong. I have an H22A4 in my 91 Accord. I DO NOT have ATTS and Not all Preludes with this motor were type SH.There is no more a limiation on building this motor than any other H22
Credit goes to accordinglydone.com for the stats.
H22A4 Prelude SH 99-01 200 156 10.0:1 87 90 DOHC VTEC 2157 USDM
</TD></TR></TABLE>
Wrong. I have an H22A4 in my 91 Accord. I DO NOT have ATTS and Not all Preludes with this motor were type SH.There is no more a limiation on building this motor than any other H22
hey man i have an h22a4 how do i know if it's SH??? i bought the car without transmission and i got a SH transmission but i don't know if i have a SH BLOCK. can u guys help me please?
01-21-2009, 10:39 AM
#49
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Re: h22a vs h22a4
I don't know if there is a particular why to verify and know how to tell apart a SH block from a Base H22A4 block.
Is there?
Is there?
01-21-2009, 02:31 PM
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Re: h22a vs h22a4 (I got the CD5 Jeebies!)
Look at the oil filter. A Base block will have the oil filter mounted perpendicular to the back of the block, while an SH block has the oil filter at an angle.