frankinstine

[hondakid1996]

okay so my 91 lx has the basic f22a1 in it and its lacking some power. 125 just isnt enough. so i was thinking about a frankinstine build. my f22a1 block, a complete h23a1 head, and a good 10 psi of boost. im looking for any advice, thoughts or possible gains. thanks!

[mcdizzle]

just swap in an entire h23 or boost the f22 already in the care....

also its frankenstein.....

[turboAccordHSF]

Search around the forum, you'll see why people don't like these kind of builds and why some do.

And what exactly is wrong with your F22?

[hondakid1996]

okay sorry about my spelling. and nothings wrong with my f22. the point is, i want the iron selves of the f22 and the dohc of the h23. and they mate up almost perfectly. then the turbo is just for some hp and fun.

[GeoffM]

http://cb7tuner.com/bookstore.htm

Helpful.

[JustSomeGuy]

dohc isn't all it's cracked up to be. with carefull planning and the right combination you can make just as much power on your sohc f22a1 as you will with a frankenstein and you'll prolly be more reliable. just do all your regular maintanance and get some colder plugs in it, then boost it. ( depending on condition on your motor ) if your motor is up there in milage do a rebuild, upgrade as you see fit, and stick with it. a good tuner will get you where you want to be.

[deevergote]

This question is asked repeatedly. This is the second one this week, and it's only Tuesday.

The iron sleeves of the F22A are no stronger than the FRM sleeves of the H23A. In fact, the FRM sleeves are stronger, lighter, and dissipate heat better. They just aren't compatible with most common forged pistons (Mahle makes FRM compatible pistons.)
The F22A head has a better port design and valve angle than the H23A head. There is a reason why Bisimoto's record-breaking drag Insight is using an F22A head and not a DOHC head.


If you put the H23A head on the F22A block, there will be a sharp edge in the combustion chamber, due to the difference of the bore diameter and the combustion chamber diameter. This will provide a perfect source for engine-killing detonation. Slap a turbo on there, and you're pretty much guaranteeing that. Boring the cylinders to match the larger combustion chambers would leave you with terribly thin cylinder walls. The only way to combat that would be to resleeve the block... and then you could just resleeve an H23A block and have everything bolt up properly.

Frankenstein motors are a bad idea with the F and H series. Unless you know enough to make it work, and have a specific need that such a motor could fill (honestly, I've never heard a good reason for it) then you will most likely be putting lots of time and effort into a very unreliable project. If you know enough to make it work, you wouldn't be making a thread like this.

[hondakid1996]

okay, so with all that being said, how indepth is a complete swap? i mean taking out the old and puting in the new isnt too complicated, but will it be a direct fit?

[Accrdwgnguy]

Its called a Frankenstein because the H head does not fit the F head "perfectly" as you say, you gotta do some custom stitching to make them work right together.

Get a cam and tune your F22, thats some cheap power.

[Tippey764]

Do you even have the proper budget for all new gaskets and timing belt equipment letting alone the swap itselfs cost?

[deevergote]

okay sorry about my spelling. and nothings wrong with my f22. the point is, i want the iron selves of the f22 and the dohc of the h23. and they mate up almost perfectly. then the turbo is just for some hp and fun.

A complete engine swap is MUCH less complicated than a headswap... and far more likely to be reliable. The most common swaps are very well documented in the "swaps" section of this site. Read through those before asking "how do I do it"... If you have any specific questions, we will be glad to help once you've read through that information. Otherwise, we'll only be wasting our time repeating information that is already available to you.

[hondakid1996]

Do you even have the proper budget for all new gaskets and timing belt equipment letting alone the swap itselfs cost?

i can get the complete head from my junkyard for 50 bucks. gasket set is like 50 on ebay. honestly i could probably do it for like 150 bucks and a day or 2 of work.

[GeoffM]

i can get the complete head from my junkyard for 50 bucks. gasket set is like 50 on ebay. honestly i could probably do it for like 150 bucks and a day or 2 of work.

Intake and exhaust gaskets
Timing belt kit

$250?

[hondakid1996]

Intake and exhaust gaskets
Timing belt kit

$250?

i doubt it, i mean my local autozone sells all of that for way cheep. and its duralast stuff so it all has a liketime warenty. but oh well. ive decided to tune up my f22a1 and boost the shit out of it.to an extent anyway. delta cam, chipped p06, port and pollish, stuff like that. then ill peice the turbo together.

[Chris2388]

I have to say I have been reading on this forum for a lil while now And like everyone is saying its not worth the headaches doing the head swap. Just rebuild the f22 and turbo it. If you dont want to turbo it just buy a H22a and a P13 ecu and rite there you will have 200hp to play with. Also if you rebuild the F22 make sure you buy Quality gaskets and seals. Spend the money once on good known brands and have it work out rite the first time. You wouldnt want to do a rebuild on the cheapest parts you can find because then your newly rebuilt motor wont last as long as it should and thats the last thing you would want.