H23head/f22a6 block or h23 whole swap?

[Tman6925]

I'm not sure what to do, but would the power difference and output be much better if I just got the whole h23 engine or would putting the h23 head on my f22a6 block have basically the same output potential???

[Jarrett]

What do you have access to? The H23 pistons have slightly less of a dish in them so compression would be higher with the whole swap as opposed to putting only the head on. That would be the only direct performance benefit. Also, if you do have access to an entire H23, what condition is it in? How many miles are on it? If your F is struggling then by all means throw the H23 in there. Be sure you grab the ECU and distributor though. But we need a little more info on your situation.

[Tman6925]

Ya sorry I wasn't specific I dont have access right now I'm just trying to plan out what I'm gonna do though, and any advice is appreciated. But right now my motor has 240,000 miles on it, and it still runs fine so far. But I was thinking of rebuilding the or atleast updating the bottom end to get it back in new condition then do the head. But would a full swap possibly be the better way to go cause of so many miles?

[92ex]

h23 has higher compression and a bigger bore, that's where it's power comes from. Of course you could just use jdm f22b pistons since there dome

[Tman6925]

I also have another question the h23 and the f22b dohc are the exact same from what I've heard but are their ecu's set differently, like is their a rev limiter on one and not the other? or are both ecus interchangable with either head? just trying to narrow this down guys

[lucid]

is their a rev limiter on one and not the other?

All stock honda ECUs I've seen have a factory preset rev limiter. Some and likely all JDM ECUs have Top Speed Governors on them. I think somewhere between 112 and 118mph . Depending on the engine/ transmission setup- you could hit the limiter in fourth gear. USDM Integras, Civics, Preludes and Accords are free to drive downhill with their weaker powerplants until they reach into the 140s

[92ex]

you sure, cause I'm pretty sure people hit speed limiters with their f22s/h22s

[Tman6925]

So then going with the H23 setup would be better than, because the usdm ecus are less limited. Hmm well I think I've made up my mind I'm going to go with an H23 engine swap rather than a hybrid, I think it would just be better off replacing the whole engine than keeping my 240,000 mile block haha. I have another question now, I have an automatic tranny, would the gains be any better if I forked out the extra money and effort to do the 5 speed swap? Or should I just stick with the h23 auto instead of converting it...I heard that with either prelude tranny, the 1/4 times will be very close wiether its auto or manual

[lucid]

you sure, cause I'm pretty sure people hit speed limiters with their f22s/h22s

Back in the day I had a '95 Integra and my roomate had a '90- we both would let them eat on the highway for an hour or so at a time in the 125-135 range. I haven't gotten much over 100 in my '92 accord, but my '93 Prelude Si VTEC hit 140 on the way to the track the other day, and my bro's '97 (Prelude) was right there with me. I have another friend with a '92 Prelude swapped to JDM H22A and he can't go over 118 I think is the number he said. Keep in mind the JDM motors are usually slightly higher power and definitely lower mileage, and it is not that expensive to have someone "chip" your ECU. I plan on using the services of a guy on eBay who doesn't sell ECUs, but installs the parts and reprograms yours. It only costs $60 (eBay search for "ECU chipping service"). This will give you more power thru more aggressive air/fuel curves, timing and you can also have your rev limiter moved around and your speed limiter removed. You can even have your check engine light come on as a shift light wherever you want. Try to get as good a grasp on exactly what you want down the road as you can. You have a lot of options out there, don't lock your performance potential down to avoid a $60 hurdle if you're going for straight performance. The only two upgrades I know of that can get you close to 10hp for less than $100 are an ECU reprogramming and a (Hondata/Nextgear/PPP) intake manifold gasket. I wanted to go H22 on my Accord, and have the motor, but It will be cheaper and make more power to throw 7-9psi of boost to a stock 2.3. Take your time and learn all you can so you can make the right decision- I like to have an idea of each of my cars as a finished product- what I would want it to be to be happy enough with it to call it done, that way I don't regret or replace anything I've bought.

[hybridizer]

Im in the same predicament as u buddie , i picked up an h23a1 w/a snapped crank CHEAP that i plan on rebuilding if the main journals aren't Fuk'd, but even then i got spare f22 lieing around not including the one i blew the rings in hitting the rev limited every day since i bought it and am still driving to this day at 240,000 k's. Which im gonna haveto rebuild anyways if i wanna throw the head on

either / or id rather have the reliability of a rebuilt usdm engine than sumtin from over shores u know nothing about, not bashing jdm or anything ive owned a jdm zc crx which i beat the shit outta b4 trading it for my cb

[lucid]

Giving it 10/10ths helps weed out the weak parts, so screw them anyway, I ain't carrying around no damn pussy parts unless they can handle what I have to dish out, that's how I roll . This same mindset can be applied to vehicles too!

[Tman6925]

Hmm that sounds pretty good, I like the idea of that chipping service, I'll have to look into that. That sounds pretty good than, a full h23 usdm swap. What would be better for that motor though turbo or n/a??? And if turbo can the h23 AUTOMATIC tranny take that abuse? Thanks for all your comments guys

[mondojackal]

i recommend using the a6 lower intake manifold plenum..its smaller diameter, giving you more torque, which is always the weak point of a 4 cyilinder motor..

[wed3k]

go for a f22b swap...the amount im spending on a h23 headswap surpasses the whole f22b engine swap.

[NAiL05]

Well since he is already debating the h23 might as well its not a bad swap. I dunno what type of ECU would be compatible with that maybe a chipped p06? The stock would be the normal p14 but i dont think thats chippable. Midniterayne and another person has a boosted h23 so might wanna talk to them about it. But i would say boost the h23 if you get it lots a torque. JDM ECU's have a limiter in them that limits them from 115-120 basically a lil under 180kph. Chip it and it will bypass it. Chipping can be done at a local performance shop and such i dont trust ebay. I had a friend chip mine and he did it for 20 bucks i just had to provide him with the ECU and chip. MRX on here can help you out if your lookin to chip an ECU. He is prob one of the better people that know what hes doing when it comes to chipping an ECU.