Sorry, but have no automotive experience at all, except for installing an air intake. So im trying to teach myself here. But I was just wondering what does changing the head of an engine do? I have a f22 in my Accord Lx 97 and i was wondering, if i was to put a different head on it, say a h22 what would the difference be?

 

As far as I know it will do nothing. My head was changed to an chrome cover and there is no difference.

 

Is this a joke post?

He's not talking about a valve cover. He's talking about the head.

OP where did you hear this? Why does everyone seem to know about the "G22" but doesn't just search/ask about an H22 swap?

 

Ideally, changing a head can increase volumetric efficiency. The more fuel/air you can get thru the system, the more power it can (theoretically) make.

This gets problematic when you're dealing with Honda and other like manufacturers.

Honda heads are most all 4 valves/cylinder designs. The only real choice you have (without radical machining) is single overhead cam (SOHC) and dual overhead cam (DOHC) designs.

Other than the "cool factor" (which motivates far too many people), the only (real) difference is this:
You can change the camshaft/crankshaft timing individually with the DOHC design (it has a cam for the Intake Valves and also one for the Exhaust Valves).

P

 

yeah im not sure if your joking or not but i dont mean the valve.

 

 

(Spits out soda comically)

I'm sorry, you put a chrome cover on? And didn't gain power???

I'm speechless

But seriously, P_Adams covered all you really need to know (as he usually does). Depending on the F22, your head may already flow pretty darn well and will not need modification... unless you are going for a bigger hp build.

 

There are probably many more things to consider before changing a head if you don't know what it does.

 

Changing a F22 head out for a H22 will lower your power output . This is due to the decrease in compression that will occur . The combustion chamber volume of a H22 head is 53.8cc and the combustion chamber volume of a f22 head is 50.5cc . The larger area in the combustion chamber (along with the 88mm opening HG ) will lower compression thus decrease power . The valve angle as well as flow potential of the F22A1 head is also better than that of the H22 . The "G22" engines that you may have seen making big HP numbers are from boosted cars and a lower compression ratio will allow a larger volume of combustion mixture to be pushed into the cylinders with less chance of detonation and therefore create a larger explosion and a greater amount of HP . You would be far better off spending your money or head work , cam , header and CAI . To do the H head swap on the F22 block you will need to close 2 oil returns , change most of the timing components , water pump pulley and I think the oil pump gear ( but I'm not 100% on the oil pump gear ) , plus to make any real powder you'll need to go with forced induction . With forced induction you should go with forged internals . to realize the full potential turbo cams and significant head work should be done and proper engine management and tuning . With all that you're well on your way to 500 WHP and 5K + spent . Then you'll need to upgrade tranny , axles and clutch ( another $2500 ) .