DOHC F-series? - Honda Prelude Forum

jsmooney · 01-16-2003, 08:05 PM

My friend has an accord with an F22A1 (i believe) and he wants to know if there is an F series DOHC head that will fit his block. I will not give up my F22B right now, not enough $$ for VTEC. I know there is an F20B head, but.... Does anyone have a head that will fit his block?

Thanks,
JS

92 SI Ludester · 01-16-2003, 09:35 PM

not sure and i highly doubt this but how about the F20C (S2000) i know it is a F and DOHC

achemze · 01-16-2003, 09:42 PM

uhm, an f20c attaching to an f22? If you could make that work, i want to see pictures. That just seems far fetched to me. But then again, what do i know?

red92s · 01-16-2003, 10:17 PM

I remember reading in a magazine that a company put a DOHC head on a f22 block, but it cost an ass-load of money to do it.

[SUB[EX] · 01-16-2003, 10:45 PM

I ask this question about once a month and i still have not gotten a direct answer. I wana know if its possible also. From looking at the actual block castings they look identical. I have not seen where the head bolts up tho.

myke · 01-16-2003, 11:02 PM

Quote:

Originally posted by jsmooney
My friend has an accord with an F22A1 (i believe) and he wants to know if there is an F series DOHC head that will fit his block. I will not give up my F22B right now, not enough $$ for VTEC. I know there is an F20B head, but.... Does anyone have a head that will fit his block?

Thanks,
JS

The F22A1 is a SOHC...there is no way that u can make it a DOHC!!!! The F22B is a DOHC..that i know for sure!!! But the F22A1 is a SOHC not a DOHC!!! a couple of friends of mine were successful at puttin H22A pistons into a SOHC block, it runs pretty well too,,,they said that it ran just like an H-motor.....but it was a SOHC...its just that theres alot of werk invoved...so if you have questions go to www.pfispeed.com !!!

jsmooney · 01-17-2003, 05:33 AM

sorry, I KNOW that the F22b is a DOHC, cause i drive it everyday. And, i like it more than the H23! So, the block is what matters in this, not the head?

4thGVtec · 01-17-2003, 09:28 AM

Quote:

Originally posted by 92 SI Ludester
not sure and i highly doubt this but how about the F20C (S2000) i know it is a F and DOHC

the first problem i'd see is the f20c runs off a timing chain, and the f22a is a timing belt... so your gears or crank pully would have to be changed

92 SI Ludester · 01-17-2003, 02:48 PM

Quote:

Originally posted by 4thGVtec

the first problem i'd see is the f20c runs off a timing chain, and the f22a is a timing belt... so your gears or crank pully would have to be changed

thats true but like they say, anything can be done with enough money...if they fit a NSX motor in a Del Sol i am SURE there is a way to make the F20C work...i guess

Forbidden · 01-17-2003, 04:10 PM

Theorically F-series heads should fit the block, the exception here is the F20C cause the engine turns the opposite way than most (if not all) previous Honda engines.

myke: How did your friends did that? did they get the block sleeved or just bored? F-series engine have 85mm bore and H-series have 87mm bore

jsmooney: The F22B is the same as the H23 except is has a smaller bore. Though it might have higher compression...

brendon2k · 01-17-2003, 04:32 PM

Quote:

Originally posted by jsmooney
sorry, I KNOW that the F22b is a DOHC, cause i drive it everyday. And, i like it more than the H23! So, the block is what matters in this, not the head?

why do you like it more? it is pretty much a h23 with slightly less power.

Preyluder · 01-17-2003, 04:37 PM

Quote:

Originally posted by brendon2k

why do you like it more? it is pretty much a h23 with slightly less power.

Plus, doesn't the h23 have higher compression?

The h23 is just a better engine than the f22.... simply put....

Satan_SRV · 01-17-2003, 04:46 PM

F20C - DOHC VTEC S2000 motor, forget about it, everything is different
F20B - This is a DOHC VTEC H-block, trust me. It just has an 85mm bore

kennethmina · 01-17-2003, 04:54 PM

then how about my F20A.. JDM 90-93 Accord Si...

hehehe...

Preyluder · 01-17-2003, 05:02 PM

That'd be a good swap, but the head alone wouldn't have a chance to match up with 2.2 block.

[SUB[EX] · 01-17-2003, 06:52 PM

Ok, so besides the bore, what is the difference between the F22 and H22 Block. Are the Head bolts in different locations?

Preyluder · 01-17-2003, 07:30 PM

The f22 is a SOHC engine... that's one pretty considerable diff. if you ask me.

jsmooney · 01-17-2003, 09:30 PM

fvck yall, F22B is DOHC, so, not all f22's are SOHC!

[SUB[EX] · 01-17-2003, 10:59 PM

Just because the HEAD is dual cam's means NOTHING about the bottom end.

Ok let me try to explain to you guys that are a little less informed. The f22 and H22 bottom end are almost completely identical. The bore is a little different. Its a 4 cyl 2.2 liter engine. Its got the same crank, i believe the bearings are the same or at least they appear to be. What i want to know is if the Head bolts are in the same locations, or if not can they be relocated, im guessing if there not then they can be moved. Ohh and as for the bore being different, it really does not matter, you can run the stock f22 pistons/rods as long as they dont hit the head. and i dont see why that would happen. Im sure the h22 rod's/pistons are better but i dont think its that big of a deal, if im wrong then correct me and i will know better.

ShadowSonic · 01-18-2003, 06:29 AM

Quote:

Originally posted by Preyluder
That'd be a good swap, but the head alone wouldn't have a chance to match up with 2.2 block.

Eh .. 2 much change over i'd just stick with the H22 swap.