Shazi All Motor

hey guys, i have a complete sir F20b head put down with timing belt, headgasket, head bolts, cams w/ camgears and everything sitting. my friend has a dohc F20a in his ascot and would like to know if my sir head will work on his F20a block so that he can go vtec.

plZ do not tell me to buy a complete f20b engine if the swap can work just plz guide me as to what will be needed to do this Frankenstein if it is possible and if it is a direct bolt on.

Shazi All Motor

plz shed sum light here any1

1funryd

Take pictures of both and post up so we can see what you are talking about.

Bouckaroo

It should work but you may have to plum in the oil line like you would on a b18b with a gsr head.

1funryd

So you have this F20a motor and you want to put an H22 head on it?







This really depends on how much you are going to put into this build.

An H22 is about $895 plus $250-300 shipping, or if you buy locally its maybe cheaper.
An F20B is $545 from tigerjapanese plus shipping, and if you weigh your costs out, you are probably better off purchasing the entire motor.

After you get all the correct parts to make this build work correclty, you will have spent $1500 to $2000.

So why are you doing this build vs purchasing a complete motor? It is not a direct fit without mods.

Bouckaroo

sean hes not sayign he is gonna buy the whole engine, he is saying he has the head(f20 b <which is a vtec head of tourneo accord> and his freind has the block(f23 non vtec from accord) and they wanna homo the 2 together to create a frankenstein F23vtec.

its not really hard, although you will have to deal with the lack of oil to activate vtec, jsut like you would if you did b18b with b18c3(jdm gsr) head.

1funryd

Yes, I know this, but like I said after getting all the parts that will essentially make this an official F20B motor it will cost more than purchasing the motor in its entirety.

I know because I am building an H23vtec currently and every little gasket bolt, water pump, oil pump etc ads up.

The only difference in my build is I got a Darton sleeved H23a1 block for dirt cheap which eliminated a good chunk of my cost.

But still by the time I have everything balance, and all necessary parts, I am probably going to end up sending $1500.

Bouckaroo

ahh i see what your are saying, basiclaly this swap will be a f20b with longer stroke.
and, yes i know how that part sitution goess, i feel you, just in oem parts for my h23vtec,(all seals and whatnot) was almost 1000 from stealership. my j swap was almost 2000 if you include the flywheel and all the bolts and seals and gaskets and thermostat and what not and that came from an online honda parts distributor.


I dont think this guy understands what all he needs to do to make this setup work well.

1funryd

Yep, thats why I was putting out the information, because like you and I and most DIY's understand that while many take for granted the whole "slap this on and slap that on" its not really that at all.

When you look at the details, its really expensive to do it right and to do it clean.

The only time its cheap is if you get an properly built block and all accessories for less than $700 all together, now that is cheap.

And if the op goes to tigerjapanese.com he will see the price of a F20B long block with everything together already vs building two separate motors to equal what he could have gotten in one fail swoop.

Ya dig????


For reference:

F20B - $595 + shipping

Shazi All Motor

i really just want to know if the f20b doch vtec head is a direct bolt on to the f20a dohc block and all the things i'll need to have and do to get this frank-motor banging vtec.

Bouckaroo

no its not direct fit. you will need the headgasket for the block, and then you will nee d to deal with oiling lines for vtec as well as some other minor adjsutments. I think that you will need to change a few of the small items like thermstat housing and intake maifold(use the vtec one) as well as your harness(or just wire in a vtec line) as well as ecu, you will need to get a chipped ecu to run that combination.

i think you need to do more research as there are lots of small parts that need to be bought and replaced to build it correctly as sean has already said.

perhaps start pricing out all the seals and gaskets needed do this and you will see that its not jsut a matter of a few bucks and some time. Before you moutn the head to the block you will need to make sure both surfaces are true.

v4lu3s

what kind of oil line set up is needed for a H series type head on an F series block? That is teh first I have ever heard of that, usually I just hear that you remove the oil control orifice from the block.

Bouckaroo

http://www.cb7tuner.com/vbb/showthread.php?t=187140


i jsut found this to help this guy, it comes from cb tuners, a forum that deals with accords and accord related stuffs.

1funryd

Just this image alone should stop you in your tracks if you cannot get your head around this hybrid head block combo.




More pics of this combo setup:





F20a Block:


F20A Head:





Figure that out and tell me how simple it is to just do an H22 head swap on to an F series motor.

Does this look like a simple bolt up situation to you???

I mean no disrespect, but hybrid combonations are hard enough without having to machine them to work together.

v4lu3s

in other hybrid F/H head swaps they often have to block oil drains and so on, its NOT uncommon for gaskets to not match well.

what i can not get my head around is the comments that this kind of swap is like a b series one with an external oil line etc, when every other F series head swap has NOT had anything like that done.

btw your little pic is interesting. but seeing as the f20b has 85mm bore and the f20a has 85mm bore...i am not sure what the relevance of the image is....

Bouckaroo

I said you MAY have to plumb in the oiling line for Vtec. MAY is the key word in that sentance, but since you seem to ahev read other threads about people doing this swap, then perhaops go do what they did, and stop asking questions and looking for others to do all the legwork for you.


Simple.

Shazi All Motor

thx guys, my question was perfectly answered :D

JarrettL

Hey guys, I just found this thread in a Google search and the pictures and quotes used here are from my post on CB7Tuner.com where I have a Frankenstein sticky thread.

OP, you're asking to be spoon-fed and that's ridiculous. Can it work? Sure. Reliably and without a lot of additional work to make it mate up? Not even close. If you want the head to mate to the block you have two options. You can block off the extra oil drains in the head with Hondabond or some other compound that prevents oil from going down a passage it was supposed to. Then you have to get a head gasket for the block and it will be responsible for not allowing oil to leak through the other orifices even though the picture showed you just how off the other holes are. Good luck, they leak all the time. Or you could have the holes on the head welded up and reshaped with a carbide bit to match the block. That would be best but very expensive. I'd say in the $300 range for someone to do that and machine to head when done.

Stop asking for handouts. You're posting a question that could have easily been solved with a tiny bit of searching onto a forum and stipulating what the responses can and can't be. Grow up.

To everyone else, you're talking out of your asses when you're talking about how VTEC is added to a non-VTEC H/F-series engine. Thanks for all the help in uselessly confusing people.

Apex1972

buy a ******* H23 bluetop fool.