F23A block w/F22A head

[gloryaccordy]

"I have a friend" who just got a CB that's burning oil. Rather than rebuild his tired F22A, he wants to get an F23A, throw the VTEC head in the garbage and install an F22A6 head he has sitting in a garage somewhere. Question is, he won't run into any problems w/oil+coolant passages or anything *** like that right? I know there is usually an extra oil port for VTEC... other than that is there anything he should worry about?

[90Cb7sleeper]

Most likely use the front timing components from the f22a, convince him to just swap the whole f23. Samauri88 has done it if you have questions.

[gloryaccordy]

Most likely use the front timing components from the f22a, convince him to just swap the whole f23. Samauri88 has done it if you have questions.

F23 head doesn't have as good flow as the F22A

[Ant]

I've considered doing this. Is there a write up on how to do this?

[wed3k]

I've considered doing this. Is there a write up on how to do this?

have you ever thought of being a pioneer? id personally rip all the internals of the f23a and stroke a h22a4.

[CB7lx91]

have you ever thought of being a pioneer? id personally rip all the internals of the f23a and stroke a h22a4.

same bore?

[Ant]

have you ever thought of being a pioneer? id personally rip all the internals of the f23a and stroke a h22a4.

I'm not that mechanically incline like most ppl here. But if it's just swapping heads then that's not a problem for me.

[gloryaccordy]

same bore?

No, I'm not even sure they have the same crank journals

I don't really care though, I just need a new motor soon

[jdm92_accorn]

"I have a friend" who just got a CB that's burning oil. Rather than rebuild his tired F22A, he wants to get an F23A, throw the VTEC head in the garbage and install an F22A6 head he has sitting in a garage somewhere. Question is, he won't run into any problems w/oil+coolant passages or anything *** like that right? I know there is usually an extra oil port for VTEC... other than that is there anything he should worry about?

i've built one for a friend, he has to use the f23a5 non-vtec block and yes the the f22ax head fits perfectly. the compression gets a bump to boot. not much though, the only thing is that the f22ax has a better bottom end than the f23 the rod journals are different. talk to bisi he'll tell you the same.

[gloryaccordy]

i've built one for a friend, he has to use the f23a5 non-vtec block and yes the the f22ax head fits perfectly. the compression gets a bump to boot. not much though, the only thing is that the f22ax has a better bottom end than the f23 the rod journals are different. talk to bisi he'll tell you the same.

Cool good info man. Bottom end isn't really a concern as this is just for a car to get me to and from my parents/GF's house/CB7t meets

If I can find something cheap I'm going this route

[jdm92_accorn]

no, its pretty stable, just if you plan on any real serious power change to a stroked crank for an f22. as far as the motor in mostly stock form, aka i/h/c h23 intake mani delta or bisi moto cam, you know the bolt on stuff it does pretty good. just keep the oil changed. i seen good numbers out of the one i built. it had a mild port job, bisimoto stg2 cam, valvesprings, teflon exhaust rocker spacers, megan racing header and cat-back, ebay short ram intake and chipped p28 tuned with crome. it layed down 163whp and i think some where around 147wtq. it was pretty fast, we put it in a 94 accord wagon.

[wed3k]

No, I'm not even sure they have the same crank journals

I don't really care though, I just need a new motor soon

so you're going to go in and start franking motors? just do a stock rebuild.

[gloryaccordy]

so you're going to go in and start franking motors? just do a stock rebuild.

If it costs the same and involves the same amount of work... why not

[wed3k]

If it costs the same and involves the same amount of work... why not

i can get a f22a for 100 bucks, a f23 would cost 350 bucks. rebuild kits are probably cheaper for a f22a.

if he doesnt want to purchase the block and can afford the downtime just freshen up the existing motor because you know that it was running by the time you ripped it apart.

[bruno8747]

i can get a f22a for 100 bucks, a f23 would cost 350 bucks. rebuild kits are probably cheaper for a f22a.

if he doesnt want to purchase the block and can afford the downtime just freshen up the existing motor because you know that it was running by the time you ripped it apart.

If you dont know what you are doing hybrids can be a total headache.


F23a Has 55mm mains, Thats why the crank will fit perfectly in the H22A4. It wont fit our blocks with the 50mm mains.

Also the F23 connecting rods are thinner, And they have floating style wrist pins, Even the wrist pins are smaller than standard size F22A.