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Old 09-19-2009, 02:44 PM   #1
h22honda98
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F22B swap

Hey guys. no one on any of the prelude forums knows the answer to my question, and i have searched, so i figured i would ask the guys who prodominantly use this engine...accord guys. for the record, i am not a beginner to honda's whatsoever, but i dont have the posts to make a thread in the "real" forum, so this is my best bet.
I am swapping an F22B DOHC into my 5th gen prelude this weekend. as far as the prelude community is concerned this engine is almost irrelevant and no one has done this swap into a 5th gen. i have done many swaps, so swapping it is not the problem, its just getting it running. I am not entirely sure what all needs to be swapped over from my obd2 h22a4 (if anything) to get this f22b into my prelude with no CEL's/ annoying obd issues. I figured i will have to wire in a ckp sensor, or something, but i have never messed with wiring, and patience would be appreciated. I am getting mixed answers, and i am worried i wont be able to get this done . I have already ordered a conversion harness and a P28 with a stock f22b map on it. I will be boosting and tuning in the next few weeks so thats why im not just buying a stock ecu. what all will i need to swap over? dist,injectors etc....? i plan to use my stock h22 harness. also, are there any things i should have disabled on the ecu im ordering? knock sensor? also, does anyone know if my power steering pump will work with the F22B? thanks for the help guys. Anyone that knows the answer to this question, PLEASE help me out! i have the engine sitting in my garage from HMO right now and i am too scared to swap it because i dont want to get it in there and not be able to get it running. thanks again.

Brandon

im not sure if only beginners post in this forum, it sucks i cant make one in the actual forum. so please, only people with real knowledge on the subject post. thanks.
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Old 09-19-2009, 06:08 PM   #2
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You actually have a much better chance of getting real help in this section. We don't encourage beginners to stumble around blindly until they get 30 posts... the purpose of this forum is for those with little knowledge to gain more knowledge unmolested. Flaming is not allowed in this section. Members are expected to post helpful information, or not post at all.

Anyway, I gather that you're planning on changing the F22B over to OBD2, rather than converting the car to OBD1? If you're going to be working with an OBD1 P28, it would probably be wise to convert everything to OBD1... which means you won't be changing anything on the engine, but you will have to hack up some wires.

The F22B is a direct swap into a CB, which means the CB's wire harness should have all plugs necessary. I'm not incredibly experienced with wiring, and I've never done an OBD conversion... but getting ahold of a wiring harness for a CB might be a good start.
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Old 09-21-2009, 04:47 PM   #3
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Just curious as why the h22 is coming out?
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Old 09-22-2009, 12:47 AM   #4
h22honda98
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Thanks for the replies guys. ive been out of town so i couldnt get to a computer. deev, the car is also being converted to obd1. i was under the impression that you have to be obd1 to tune, and i will def. need a tune. as far as "hack up some wires", what exactly are you referring to? how in depth would this be? i think i might have to wire in a ckp sensor...any knowledge on that?

i contacted rywire by the way, and they mentioned something about sending in my h22 harness, and the hacked up harness that i got from HMO and they would make me a harness that worked. im not sure how they could just "do" that but hey, if it works then ill probably consider it. they want $300 for it, so if the wiring is minimal i would rather just do it myself.

as for why the H22 is being pulled out. I have wanted to boost my prelude ever since i got the car. The H series engines just seem like too much of a risk to boost. sure, you CAN boost an H22, and odds are itll be fine for a while, but they just seem to detonate and crack ringlands too often with the high compression. i just dont want to deal with it. not to mention that a replacement for that engine would run $1000+. the F22B sounded like a good idea. iron sleeves, low(er) compression, a cheap price tag, and that awesome reputation that F series engines have for boosting. ive also never seen an F22B 5th gen prelude before, let alone a boosted one. so itll be cool to do something a little different.

Turbo set up:
5th Gen Prelude
DOHC F22B
Garrett T3 Super 60-.60/.63
Lovefab Mini-Me EQ mani
Tial 44mm WG
Greddy type RS BOV
Walbro 255
DSM 450's
Treadstone intercooler & piping
tuned on a P28 w/ eCtune

all i need is the wastegate and im good to go. the turbo is on its way
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Old 09-22-2009, 03:44 AM   #5
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Sounds like one hell of a task with that wiring harness, goodluck! Itll be unique if nothing else
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Old 09-22-2009, 03:20 PM   #6
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I believe instead of hacking up your harness, you could buy whats called a step down harness that converts your obd2 harness to obd1 or 0. Here's a pic of what it would look like.
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Old 09-22-2009, 03:41 PM   #7
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Use 96 Prelude H23 dizzy. If you are boosting, you want bigger injectors anyways, so OBD2 injectors that would fit an H22 would work. Use the OBD2 - OBD1 ECU harness, if you don't already have one. The H22A4 engine harness should fit the F22B, you may need to move some connectors. Coolant temp sensors may be different.

The H23 and the F22B are externally very similar, if not the same. See if the 96 H23 has this ckp sensor you need.
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Old 09-22-2009, 03:43 PM   #8
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I never thought of that.

And yeah, that harness would be a good thing to go with. I keep forgetting that people actually make conversion parts... I don't work with any OBD2 cars, so I'm pretty ignorant about that stuff.

The OBD2 H22A injectors are actually smaller than the OBD1 injectors. They're a different type, though.
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Old 09-22-2009, 04:16 PM   #9
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4u2h8me, i do already have an obd2 to obd1 conversion harness. as for the injectors, i already have DSM 450's with a resistor box, so ill have to wire in the injector plugs to my understanding. accordwgnguy, could you explain to me why ill need to use an obd2 H23 distributor? not to mention how hard that particular part would be to find. as far as i understand, the F22B is literally a debored H23 with iron sleeves. so wouldnt the distributor that comes on the F22B be the same? Im aware its an obd1 engine, but again i dont understand why i would use the obd2 distributor.

Deever, which harness are you referring to? a conversion harness or an actual F22B harness? also, does anyone have any experience with RyWire? im really considering just sending them my H22 Harness and my chopped F harness that i got with my engine from HMO. they apparently can make it a plug and play with the harness, but honestly it sounds almost too good to be true. i kinda felt like the guy on the phone didnt know dick about what he was talking about. but then again im asking the questions so who knows.

Also, since i finally have accord guys to ask lol, do you guys think ill have trouble making the power i want on this engine? I'm shooting for 10 psi, about 280whp and 255-260wtq. any suggestions for power with these engines would be appreciated. I'm hoping the block can take 300+ whp like the F22ax engines seem to be able to withstand. ill also be using an M2A4 H22 trans. I dont really see too many weak points in this setup with the exception of my tiny 2.33'' exhaust. also, i cant quite remember how much boost the stock map sensor can read. i think it was 9 psi, but im not sure. if anyone knows feel free to shed some light. thanks for the help guys. this seems like a pretty legit forum.
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Old 09-23-2009, 09:28 AM   #10
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Quote:
Originally Posted by h22honda98 View Post
4u2h8me, i do already have an obd2 to obd1 conversion harness. as for the injectors, i already have DSM 450's with a resistor box, so ill have to wire in the injector plugs to my understanding.
Yes sir, if you already have the step down harness, then all you need to do is wire in the pig tails for the injectors.
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Old 09-23-2009, 09:52 AM   #11
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not many people know this but the 5th gen prelude XI (Japanese model) actually came with an obdII F22B. and its 4 lug as well.

the japanese 96 prelude SI (4th gen) came with an obdII f22b but it would be difficult to get your hands on one of those harnesses. since you already have obdI components, it wouldn't be of any use to you anyway.
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Old 09-23-2009, 12:47 PM   #12
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^really??? I honestly have never heard of that. if you can find a link, just because i curious and want to see this for myself, i would appreciate it. im curious as to how well the engine can take the weight of a 5th gen prelude. theyre so damn heavy.

so does anyone have any experience with RyWire / think my power goals are attainable?
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Old 09-23-2009, 05:02 PM   #13
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I've spoken to several friends of mine that have had custom harness work from rywire. None have had any bad experience with the product, just the turn around time. Now as far as your power goals, all I can say is anything is possible with the right parts and tune.
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Old 09-27-2009, 07:25 PM   #14
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alright cool. ill probably go with rywire then. just an update: i should have my clutch in tomorrow . i got a competition clutch stage 4 1620 series. holds 350wtq, so i should be good. they claimed that it wasnt bad at all to daily drive, but i guess ill have to find out for myself lol.

also got the engine out of the car this past weekend, will be installing clutch, engine and trans, then just waiting on the harness to get back. i ended up having to use my F22 trans, so i hope the longer gears dont slow me down too much. i had an f22 on my H22 for a while and it was god awful slow.
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Old 09-28-2009, 12:05 PM   #15
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The f22 tranny would be good if you planned on going turbo later on..
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Old 09-28-2009, 01:13 PM   #16
h22honda98
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i am going turbo. my setup is at the top. that was the whole premise for using this particular engine. cheap, good for boost, fits in a prelude without sacrificing and displacement lol. would you elaborate on that though? i have heard over and over that longer gears are better for boost, but i have never seen any evidence of it whatsoever. i mean, if you are getting traction, wouldnt a shorter geared transmission be faster? i know it "keeps you in boost" but i would like to hear more about it. Do you guys know anyone who actually improved their ET after switching to a long geared trannny, while still being under 300 WHP?
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Old 09-28-2009, 02:36 PM   #17
4U2H8ME
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Being that your gonna run turbo on a f22 tranny, it has taller gears, it wont rev out as fast as an h tranny.
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Old 09-28-2009, 02:58 PM   #18
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Quote:
Originally Posted by 4U2H8ME View Post
Being that your gonna run turbo on a f22 tranny, it has taller gears, it wont rev out as fast as an h tranny.
That really says nothing...


Shorter gears require more frequent shifting. In most cases, you shift once more with an H22 transmission than you would with an F22 transmission on a quarter mile run. When you shift, the turbo has to spool up again, causing a dip in power. It may not be incredibly significant. It's really a matter of taste. You're not trying to have the fastest car in the world, so if your quarter mile time suffers by .05, I'm sure you won't really care all that much.
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Old 09-28-2009, 03:01 PM   #19
h22honda98
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right, which in turn would make it slower. right? i just dont see how if you had traction, longer gears would make your car faster. i literally shaved .6 of a second off my 1/4 ET by just switching from my F22 to my H22. the only thing i can can think of would be that the F22B wouldnt have a long enough powerband to make any use of it. I'm honestly just curious. i would like for the F trans to be better because i have to use it, but its just hard to believe.
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Old 09-28-2009, 03:05 PM   #20
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Driving your turbo car out of boost will make it slower. A properly sized turbo for a 2.2L engine will take time to spool up. The turbo slows down when you shift, and you are putting down less power until it spools back up. Eliminating one shift with longer gears will result in a faster time.

You are adding a turbo... you are drastically altering the powerband of the engine.

N/A engines will benefit from shorter gearing. Turbo engines generally benefit from longer gearing, for the reasons I just explained. Traction has nothing to do with it.
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