9FRESH5

hey...i joined honda-tech just to ask u experts.
i have a 95 ex w/a SOHC VTEC motor in it (f22b1)
i wanted to kno since its already wired VTEC.
wood it b possible to fit an h22a head on it?

Andryzzle

you CAN put the H22 head on your block and theres a whole thread about it in the Accord FAQ. you would need a p13 or p28 ecu i think.

scabbs

yeah it can be done it's called a frankenstine I believe... but you cant jus swap it on top and expect to take it to 7500 rpms... you'll have to build up the bottom end for the motor to take it that high... you dont wanna throw rods n stuff... that would be a waiste of your time n money.

this is the place on this site that you'll wanna go
https://honda-tech.com/zerothread?id=776837

H22 CL

I thought the bore was all wrong for that match, I've heard that its better to do this on an F23 Block................. well, I dunno............. I was actually also thinking about this, but everybody said just get the whole swap............ I would have if the labor wouldnt cost me 2000 bucks to install the 900 dollar engine


and about that thread on the H head/F block........... what do they mean by "Decking" the block and then the "Claying" part??????


Modified by H22 CL at 4:33 PM 12/13/2006


Modified by H22 CL at 4:34 PM 12/13/2006

scabbs

I would say get the swap it would totally be way easier on you than to try to build up the bottom end.. I was thinking about doing the same thing... it's easier in terms of the swap.. because it's already in your car n all you have to do is swap heads theoretically... but it's a little more than jus that... you have to build up the bottom end to match those high revs... otherwise you're jus ruining your motor... I've seen unbuilt bottom ends with built heads hurt cars bad... my friend has a teg that he had a stock ls block n a b16 head that had skunk2 cams... n he took his rev too high and ruined his bottom end within a week or two. then he got a b20 bottom end (CR-V) same thing happened...

I dont really think it's worth it honestly unless you have the time n money to build up the bottom end... plus if you get a full h22 that means you wont be out a motor to drive with... if you have to build up you're bottom end that means you will be without a car unless you jus have another bottom end lying around... and if sumthing does happen to your h22 you can pull it out and put your old one in.. if you do the hybrid you'll be with out a car til you can get another bottom end... the h22 swap really isnt that hard if you have friends that can help you.

erik_cd5

i want to know if the f23 block pistons will hit the head valve and bend them if i dont change the pistons

GhostAccord

No they won't even come close to touching a valve. The F23 pistons have a -14cc dish top.

erik_cd5

but will it give a hard pull and they told me i got to change the pump gear do i or can i keep the same one

GhostAccord

Highly unlikely, seeing as how you will end up with an 8.8:1 compression ratio. That is lower than the stock F23 CR. It would probably pull harder an intake, header and exhaust upgrade.

I think most people that are looking to do a swap like this without changing the pistons are looking to do a turbo build.

Did they tell you why you wold have to change the pump gear? If you mean the oil pump I don't think there is one you can change to.

erik_cd5

they told me the water pump gear i dont know why they just told me that .............wat do u think is it a good project or not i dnt know cuz im berly getting into all that honda stuff

GhostAccord

Yes the water pump gears need to be changed in order to get the timing belt lined up properly with the DOHC head.

I'm not sure if it is a good project or not. Depends on if you are you looking to do a turbo build?

erik_cd5

no i dnt want to boost it i just want to keep it simple

GhostAccord

Well dropping an H22 head on your F23 is not the best route to go N/A. Unless you are going to get new pistons to raise the compression. A tunable engine management system (computer/ECU) and time on a dyno/street tune will also be a must.

You would be better off with an F22A* head and an F22A6/H23 hybrid intake with your F23 throttle body. I know it sounds confusing. Take some time and look around for F23 builds. There are a few out there that don't require boost or exorbitant amounts of money.

erik_cd5

and can i have a f23 block with a f22 head

GhostAccord

Yeah the issue with that is that the F22A combustion chamber is only 85mm at the opening where as the F23 is 86mm. You could very easily have a machine shop open up the face of the F22A combustion chamber to 86mm and not have any problems. You would also keep the F23's stock compression ratio.

You could also mill a few thou off the head while it was in the shop. Removing 0.02" off the F22 cylinder head would bring you up to approx 9.6:1 compression and you still wouldn't have to worry about piston to valve clearance issues.

erik_cd5

ok koo but wat will happen if i just sit the head of that f22 to that f23 block with out doing nothing if i just asemble it like that

GhostAccord

Not much really. It's been done before. You may or may not have a potential for hot spots where the F22 combustion chamber ridge sits 0.5mm inside the F23 cylinder bore. So long as you run an OEM F23 head gasket you won't have to worry about piston to head contact anyway.

erik_cd5

so if i just do it like that ima have to use the f23 head gasket not the f22 one

nus_dogg

Just do full H22A complete swap and be done with. Saves you the hassle.