What f series heads...

[sepulveda87]

i have a f22a4 with 97,548 miles. and was wondering what other heads are interchangable with that engine? and what power can i see in them?

[F20A CB7]

well you can fit any f22aX head on a f22a block.

you can use dohc h23 head as well, your motor will be like a h23 then with more compression thana f22a but less thana h23.

also you can swap h22 head, but hey please search a lil bit harder, youll find your answer.

[deevergote]

The only heads worth using on the F22A block are the F22A heads. Anything else, especially in the hands of someone that doesn't know what they are doing, will be unreliable. The SOHC VTEC heads are garbage, and the DOHC F series heads don't have much to offer... actually, they have less potential than the F22A head.

[sepulveda87]

ok deevergote. in your opinion what would you recommend? i am thinking about a h23 but i need some pros and cons. i have only heard of pros of it and i have seen peeps with f22B?

[deevergote]

F22a.

[ChampCoupe]

i say you get a bisimoto cam and call it a day. but that just my opinion. cost less and will see better numbers.

[AaronRVegas]

i say you get a bisimoto cam and call it a day. but that just my opinion. cost less and will see better numbers.

agreed on the cam. if you get the proper head work done on top of that, those 2 mods will be pretty sexy. if you really want your f22a to hit he hard you need to rebuild the bottom end of the motor. remember the stock redline is 6400rpm and personally i would not push a 20 year old motor to the redline.

['93CB7Ex]

port an a6 head and get a cam. lol

[deevergote]

Why not port an A1 or A4 head?

[sepulveda87]

hmmm what if i was to rebuil my a4 head with a port and lil polish job and do a 3 angle valve job? or do the same for a h23 head?

[SleepyG]

hmmm what if i was to rebuil my a4 head with a port and lil polish job and do a 3 angle valve job? or do the same for a h23 head?

Deeve broke my heart when he said the SOHC VTEC heads suck. I was gonna do a F23A turbo.

Lol, anyways I say do the A4 port/polish and all the internals of the head plus the bisi cam. Get the bottom end checked out real good too, might need to work on that too?

[flcb7]

SOHC vtec heads are performance pointless. Only good for fuel economy...SOHC vtec heads only work at lower RPMs..and when vtec kicks in ONLY one of your two intake valves open all the way and the 2nd valve only opens part way to create a "swirl" effect to combust more efficiently. Your exhaust vales don't open anymore than normal.

DOHC vtec is the screamer. Both sets of intake and exhaust valves open when vtec kicks in for added power...works on high end unlike the single slammer vtec.

F22a head PnP with bisi cam and bisi header and call it a day. You will see some really nice gains. If you have the cash beef up the block raise your compression and you will have a really nice f22 engine to play around with.

[deevergote]

If you want SOHC VTEC with turbo, you can still make more power than you'd ever need on a FWD street car.

[owequitit]

SOHC vtec heads are performance pointless. Only good for fuel economy...SOHC vtec heads only work at lower RPMs..and when vtec kicks in ONLY one of your two intake valves open all the way and the 2nd valve only opens part way to create a "swirl" effect to combust more efficiently. Your exhaust vales don't open anymore than normal.

DOHC vtec is the screamer. Both sets of intake and exhaust valves open when vtec kicks in for added power...works on high end unlike the single slammer vtec.

F22a head PnP with bisi cam and bisi header and call it a day. You will see some really nice gains. If you have the cash beef up the block raise your compression and you will have a really nice f22 engine to play around with.

Your reasoning is incorrect.

When a SOHC VTEC engine of the F22 variety is at LOW RPM, then only one intake valve opens. At higher RPM's (approx 3500) VTEC engages and both intake valves open fully.

However, the main issue with the SOHC VTEC F series heads are that comparatively speaking, the ports are much smaller than the F22Ax heads.

In fact, according to Bisi, there is only one stock Honda head that outflows the F22Ax, and that is the F20C in the S2000.

[hondavtec-r]

now can he use the a6 intake manifold or the h23 and a chipped ecu,and some injectors ..
wont that improve horsepower and lower end torque a bit??