So, I was reading up on the f-series engines, and came across on how the F22A6 has a bit more aggressive cam and stronger valve springs, with better manifolds and a nicer tune on the stock ECU.

My question is, would the head from the A6 go well with my B2 block, provided I changed the computer and used a conversion harness to go to obd1?

Bisimoto has extracted some nice numbers from that type of head, and I know I aint got near the cash of what he does, but........it can be possible to build up something nice, right?? Like around 200whp. I don't want mad craziness, just something where its nice and peppy, yet still looks relatively stock when ya pop the bonnet.

And seriously people, if ya aint got anything helpful to say about this ..........STFU.

 

I looked into it awhile back... but then just bought a whole f22a block. I believe there is a coolant port mismatch but i have HEARD not SEEN people block it off on the B2 block with JB weld and experience no problems...

https://honda-tech.com/forums/honda-accord-1990-2002-2/f22a1-w-f22b1-head-swap-complete-529272/

Check that thread out. its the opposite of what you want , but still gives you some comparisons to what needs to be done.

 

You will have to run the F22A6 intake & exhaust manifolds the thermostat housing and cooling passages are completely different. Therefore you also need to use the F22A6 thermostat housing and coolant tube that runs behind the block.

I am in the process of doing this as we speak. A6 head on my B2 block. Mind you I've gotten rid of the A6 cam and internals as I already had upgraded parts. They run the same style valve train as the B2. Parts are interchangeable.

 

So would it be better just to get the whole engine and matching ecu??? Or is what Bisi saying just silliness about the excellent head flow characteristics of the A6 head?

 

The port geometry of the F22A* heads are better than that of the F22B1-2. Therefore the flow is better out of the box.

As for if it's better to get the whole engine or not. If you can get an F22A* block in better shape than your B2, go for it!

 

so is it all F22A heads that allow this kind of flow, or just the A6, in particular??

 

From a base standpoint the ports all flow the same between the A1-A6. Where they start to differ is in the intake manifold, camshaft and tuning of each engine.

 

Okay, i see i see. Basically, im kinda inspired to do a single cam setup cause of what yer doin, (the G24 project took a dump on me , trading the blown h22 for body work) and between you and the work bisi has done, i wouldnt mind building something of that nature, of course it would be a mild build at first. Id like to be one of the first to actually venture into doing stuff with that engine and car on the island cause i haven't seen one yet..

 

Actually, I haven't heard of too many in the Maritimes, everyone want's a DOHC or boost!

 

I once did, but I think that the single route is the way to go now.

 

I am still trying to find some f22a head parts, they are soooooo hard to come by. Especially here, the only 4G accords I see now are in great shape and people are enjoying them.

 

The dream has still not gone yet!! I have done some research on this, I have read on maybe using either my block or a F23 block and IM, then use some K20 pistons for some better CR. Do some balancing of the block and make a little wider rev band, been looking around and found a M2B4 gearbox for $1000.......just need a job first

Anybody hiring??

 

Money is a factor in my build as well. That and I bought a bike that needs a lot of work....lol Lots of work out west..... Once I'm done my block training @ the end of June. That is where I am heading for a couple months work. Hopefully longer!

Surprised that you haven't been picked up to work the Long Harbour job. The local UA in NL picked up 150 apprentices for two jobs on the rock.

 

I'm wondering how your build is going? I'm just curious because I've got a cd5 f22b2 with an f22a6 head that I stumbled upon. It's my first FF and I really enjoy it!

Just wondering and wanting to learn more about this seemingly rare build.

 

There's a user on here as well as cb7tuner that's doing the swap and has run into issues with the power steering/alternator brackets/pulleys, but otherwise it's a pretty straightforward swap. Do you already have the f22a head? Unless you plan on running an aftermarket cam, there's really not a ton of improvement going to the f22a head from an f22b2. An f22b1 head or an f23a head would net more of an improvement, and, as cast, the f23a head outflows the f22a head at under .5 of lift(minor improvement on intake, large advantage on exhaust), as well as a more aggressive factory camshaft. The only real benefit to the f22a head comes with porting and slightly easier to find/use exhaust and intake manifold options.

To make similar power to an f22a6 with an f22b2, add the f22a6 cam, a decent header(the f23a upper style has longer primary runners than the f22b1/2 style), f23a intake manifold, 2.5" exhaust, and a tune. A prelude intake tube and box will provide as much of a benefit as a tube/cone filter and there's no real benefit to enlarging the throttle body opening/plate At that kind of power level. Basically, exactly what I'm doing with my f22b2 for now .

 

Will the f23a exhaust/intake manifolds bolt up to the f22b2? And the f22a6 cam drops in to the f22b2 head? Sorry I know I've spoken to you about this before but I had to delete PMs when I could only keep 5 saved as a trial user. I'm going to the pick n pull soon and I just may search out an f23a/f22a6

 

I have successfully done this as well. it can be done no problem. f22a head on f22b2 block. but seeing as they are both non vtec the b2 and a6 heads are basically the same except like stated above, cam and valve springs.
personally I would just get a f22b6 ecu with an a6 or b6 cam without swapping heads. they are so close in dimensions even though the ports flow pattern are a bit different.
to me that does not necessitate swapping over heads. but to each his own.

 

So the a6 cam can go in the b2 head without experiencing problems? The more aggressive cam doesn't require the a6 valve springs to operate properly? And the f23 intake/exhaust manifolds will bolt up to the b2 without issues?

I do like the idea of keeping the b2 head so I don't have to worry about plugging coolant passages or anything, but I don't want to damage the valvetrain if the a6 cam won't work with the b2 valve springs...

 

the a6 springs are a bit stronger to pull that valve back up faster at higher rpm. people put upgraded cams on stock springs all the time. not saying its good but it cant hurt too much. plus if you are already in that far might as well put the a6 springs in for your own piece of mind.
what you don't want is valve float. thats where power is lost. of course these stock f motors don't really spin past 7k rpms.

 

Unless something is done about the rev limiter it won't be a problem anyway.

 

Right!

 

F23 manifolds are direct bolt on, with only the f23 intake needing a couple ports plugged on the flange to get rid of the FIA That the f22b2 doesn't use, and a 3 to two wire IACV adapter from rosko racing or a homebrew solution. The only issue may be the lower "downpipe" portion of the exhaust manifold, as the patterns of the flange and hangers look to be different. The easiest solution may be looking for something that fits a 2.3CL.

 

​​​​​​These are SOHC, correct? I ask because when looking for valves, springs, cam, etc, I'm constantly seeing 2 camshafts? Feel free to let me know if I'm just stupid, but please educate me as well. I got a 92EX with damn near 400k miles. I believe it's the complete f22a6. Unfortunately with the way it smokes.... I figure if I'm gonna be that deep into it, I may as well upgrade while I replace. Just in case I want to force air later and more durability in general.