Another H22 Head Question...

[Airhonda92]

Currently building an F22 ground up for boost. I've decided to run with an H22 head. Will any H22 head swap onto a CB7 F22 block? What should I know? I know I'm being very broad but I want to know what others have done. So far what I've read are mainly full H22 motor swaps, I'm only interested in doing a head swap because I have my block ready to go... Thanks!

[theSOB]

search g32

[deevergote]

search g32

What will he find. Nothing.




There is no point in running the H22 head on an F22 block. Do some port work on the F22A head, and it is capable of outflowing even a modified H22 head. The H22 head on the F22 block will produce numerous reliability issues (at least that's what I've seen in the past). If this car is anything but a project toy, don't risk this headswap. There are no significant gains to be had by swapping over an H22 head.

Search posts by wikkedv16, search "frankenstein", and search "G22" (which is an absolutely idiotic term, as this swap does not create a "G" series engine... but it's a common term anyway)

[Airhonda92]

What will he find. Nothing.




There is no point in running the H22 head on an F22 block. Do some port work on the F22A head, and it is capable of outflowing even a modified H22 head. The H22 head on the F22 block will produce numerous reliability issues (at least that's what I've seen in the past). If this car is anything but a project toy, don't risk this headswap. There are no significant gains to be had by swapping over an H22 head.

Search posts by wikkedv16, search "frankenstein", and search "G22" (which is an absolutely idiotic term, as this swap does not create a "G" series engine... but it's a common term anyway)

Thanks for that info. I've been told otherwise by a few different mechanics, they've told me the exact opposite The DOHC will out flow the SOHC all day when tuned right. Do you have any flow charts showing the flow of either set up?

[deevergote]

Modified, the F22A head will outflow the H22A head, stock or otherwise. This is the reason why Bisi Ezerioha runs the F22A in his record breaking Insight drag car.

I've learned one thing about mechanics... they may know how to make a car run, but not all of them acutally understand performance. Everyone assumes DOHC is better. Everyone assumes VTEC is better. Nobody takes into consideration the valve angles (which are nearly ideal for the F22A, not so for the H22A). Nobody takes into consideration pord design (the F22A's design is significantly better than the H22A's). Nobody takes valvetrain mass into consideration (the VTEC valvetrain is considerably heavier).

The F22A head flows better. Have it ported and polished. The exhaust ports are restrictive in stock form, but they can be opened up easily.

Additionally, the H22A head on the F22A bottom end tends to produce reliability issues. I've seen such combinations fail even in the hands of experienced people.

[foamypirate]

If you REALLY insist on an H22/F22 frank, talk to LoDollar92LX.

[deevergote]

He's one of the few that has managed to make it work for any significant amount of time.

[Airhonda92]

Modified, the F22A head will outflow the H22A head, stock or otherwise. This is the reason why Bisi Ezerioha runs the F22A in his record breaking Insight drag car.

I've learned one thing about mechanics... they may know how to make a car run, but not all of them acutally understand performance. Everyone assumes DOHC is better. Everyone assumes VTEC is better. Nobody takes into consideration the valve angles (which are nearly ideal for the F22A, not so for the H22A). Nobody takes into consideration pord design (the F22A's design is significantly better than the H22A's). Nobody takes valvetrain mass into consideration (the VTEC valvetrain is considerably heavier).

The F22A head flows better. Have it ported and polished. The exhaust ports are restrictive in stock form, but they can be opened up easily.

Additionally, the H22A head on the F22A bottom end tends to produce reliability issues. I've seen such combinations fail even in the hands of experienced people.

Sounds like you know what you're talking about. I'm not insisting on anything, just gathering as much info before I commit to a head. I'm boring and guarding my block in the next 3 weeks so I'm researching now. What setup do you have? I know the H22 swap will be a nightmare with tuning and all so I'm leaning more and more towards the F22 head and port polish etc. My goal is to have a 350+- BHP car that isn't in too much danger of blowing up.

[deevergote]

You'd be better off installing some lower-compression Mahle Gold Series pistons in a full H22 block, and having it carefully dyno tuned by someone that knows what they're doing. A frankenstein build is inviting reliability issues.

A block guards is a very bad idea. They tend to warp cylinder walls.


Personally, I have an H22 that I haven't driven for a year and a half. Nearly stock. All my time and money goes into this site.

[immeraufdemhund]

I agree with deev on this one also. I've worked on a few h22's and a few h23's and noticed that they are just not as beefy as I would like. The h23 has a problem of cracking that pushes oil into your coolant jacket, and the h22 is just HUGE and heavy. A lot of people say that if you loose vtec your not going to be able to rev. Well the only thing that lets the h22 rev so high is that it comes with duel springs stock. The f22 is just a single spring on the valve train. If your going to want to rev (which i assume you will because your using a turbo) than your going to want to upgrade your valve train to a double (if not a triple) spring set up, with some sodium filled (or better) valves. Upgrade your valve guides as well. Do some research on building up a head. Having a built up head will be less of a "head" ache in the end. Bottom end work is important but so is top end.

anywho, glad to hear that you have time to research all this before you build. Hope your build goes well.

[Accrdwgnguy]

F22A head outflows even the B18C5 Integra Type-R head.

[wed3k]

how does a block guard warp cylinder walls?

[immeraufdemhund]

I just remembered, if you don't have the f22a6 manifold (or h23) than it would be good to have that too.

[mozzandherb]

how does a block guard warp cylinder walls?

would like to know this as well

[wed3k]

would like to know this as well

yea, if you install them and then bore/hone there shouldnt be any issues as long as there was enough press fit.