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ENG: F22B DOHC Head Swap onto F22AX Block

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  • Danno
    replied
    Wow, great writeup dude. I didn't see, did you dyno it yet?

    Leave a comment:


  • NoSloCB7
    replied
    Originally posted by Connal
    Alright, now no flames since I am new to all this. This is basicaly just taking the SOHC block and tossing on the DOHC head right? I thought the blocks were extremely similar. Isn't this essentialy the closest thing to an engine swap without really taking out the engine? And also, I have heard about about the f22b. I don't remember seeing if it has vtec though. What is your rough estimate on the hp you should be gaining? For as easy as a swap it is I think even I might be able to attempt this. Any real issues you came across while doing it? Any iffy spots that might need a little more info?
    Sorry for all the questions.
    Well, you have it half right. There is a little more to the swap than just tossing on the head. You have to change over timing components and a few other little things. The F22B is non-vtec. As far as hp gains, I would imagine that I have gained in the realm of 25 to 30 hp.

    Leave a comment:


  • Connal
    replied
    Alright, now no flames since I am new to all this. This is basicaly just taking the SOHC block and tossing on the DOHC head right? I thought the blocks were extremely similar. Isn't this essentialy the closest thing to an engine swap without really taking out the engine? And also, I have heard about about the f22b. I don't remember seeing if it has vtec though. What is your rough estimate on the hp you should be gaining? For as easy as a swap it is I think even I might be able to attempt this. Any real issues you came across while doing it? Any iffy spots that might need a little more info?
    Sorry for all the questions.

    Leave a comment:


  • oneoffaccord
    replied
    yea i figured that they were the same heads, just wanted to make sure, cuz i have a f22b at my house, thinking about taking off the head and working it.

    Leave a comment:


  • NoSloCB7
    replied
    Originally posted by oneoffaccord
    isnt the f22b head the same as the h23? nice right up

    Yes they are the same in design. The F22B DOHC head fits perfectly onto the F22AX block, meaning all drain holes and coolant ports line up. Whereas the H23 head does not. That would be the only difference between the two and between the two swaps.

    Leave a comment:


  • peego
    replied
    Originally posted by oneoffaccord
    isnt the f22b head the same as the h23? nice right up
    yes, they are the same. the only difference is one is JDM and the other is USDM. "assuming". i have both so i am awaiting to get some $$ to do this project too.

    Leave a comment:


  • oneoffaccord
    replied
    isnt the f22b head the same as the h23? nice right up

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  • NoSloCB7
    replied
    Originally posted by mondojackal
    this makes me want to do this now...will this setup work easily with a turbo setup?

    I plan on boosting the hybrid after the first of the year.

    Leave a comment:


  • mondojackal
    replied
    Originally posted by peehs
    Please get the dyno results up as soon as you can. I am really interested as to whether it is really worth the work for power or whether it is just cool to do (which it is, don't get me wrong). Also, do you see a mileage difference? Better mileage is always a good way for me to explain the need to modify my car to my wife...

    -c
    this makes me want to do this now...will this setup work easily with a turbo setup?

    Leave a comment:


  • peehs
    replied
    Please get the dyno results up as soon as you can. I am really interested as to whether it is really worth the work for power or whether it is just cool to do (which it is, don't get me wrong). Also, do you see a mileage difference? Better mileage is always a good way for me to explain the need to modify my car to my wife...

    -c

    Leave a comment:


  • NoSloCB7
    replied
    Originally posted by Funnel77
    I think he's comparing the f22a6 to the f22b. And the cost is easily justifiable, you have better top end power and the tuneability of two cams.

    BTW, my timing belt is supposed to be here today, hopefully I'll have my headswap running tonight.

    Exciting!!! Let me know if you have any questions!!

    Leave a comment:


  • Funnel77
    replied
    I think he's comparing the f22a6 to the f22b. And the cost is easily justifiable, you have better top end power and the tuneability of two cams.

    BTW, my timing belt is supposed to be here today, hopefully I'll have my headswap running tonight.

    Leave a comment:


  • NoSloCB7
    replied
    Originally posted by Masamune
    Let us know when you get some dyno results. I'm wondering if it would be wise to swap the F22B head onto the F22A6 block. I remember someone once telling me that the differences between the two in HP were so minute that you could never justify the cost.

    Is this set-up any stronger than the stock set-up? Think in relation to a turbo set-up...
    This setup is just as strong as the Stock F22AX. I'm a little confused about your one statement. Which engines are you comparing when you said the gains were minimal?

    Leave a comment:


  • Masamune
    replied
    Let us know when you get some dyno results. I'm wondering if it would be wise to swap the F22B head onto the F22A6 block. I remember someone once telling me that the differences between the two in HP were so minute that you could never justify the cost.

    Is this set-up any stronger than the stock set-up? Think in relation to a turbo set-up...

    Leave a comment:


  • NoSloCB7
    replied
    Originally posted by gromofsky_92
    What if i was to use the f22a1 Intake manifold? Will it make the whole swap a waste or is it just a small sacrafice in power. Well really there is no such thing as a small sacrafice when it comes to power. But what is the deal with that? I have one that is clean with 99k and all sensors are good. I hate to see it go to waste.
    You won't get the most potential out of your head. The DOHC head likes to breathe easy.

    Leave a comment:

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