Motohip

Ok, the H23 makes 160 hp. The H22 makes 22% more horsepower at 195. The F22 non-VTEC engine makes 140 horsepower. But the F23 makes only 10 more horsepower at 150. That's only about a 7% increase in power and that's with a slight increase in displacement and a higher compression ratio. It's only a 4% increase if we compare the non-VTEC F22 with the VTEC F22. If the F23 made 22% more power than its non-VTEC counterpart, than it would be at 170 horsepower. I know the F-series aren't built for power, but does that mean it's de-tuned? Can more power be extracted?

So what's giving the H22 so much more power than the H23? Does the F22/3 have that kind of potential with a more agressive cam and higher compression? I don't know much about engines and rod/stroke ratio and bore and all that, so if anyone can explain the major difference that would be great.

Zerostatic

The F-Series motor is the most under-rated motor in the entire Honda universe. That engine has some mean potential. in fact isn't the fastest all-motor honda a CRX powered by an F22.

agranado

interesting research. let's get the bookworms out here...

I'd like to know more...

bkmc24

thatd be nice to know, im considering either builfing my f22 then turboing it or doing a swap idk yet

DivineCL

Good luck on your research.

agranado

anyone? any info? come on SOMEONE has to know something... I was thinking about how cool it would be on the way home from work today.

-Alex

azian21485

the f22b1 (sohc vtec) has 145 hp..the f23a1 is a pretty much just a bored out f22b1 making 150hp

the h23a has a different head and port design and cam profile than the h22a...what gives the h22a more power is from the design of the head...there are too many differences between the two heads that it isn't really worth comparing

here is a chart on fseries
http://www.accordinglydone.com/data/...s.php?Series=F

here is a chart on hseries
http://www.accordinglydone.com/data/...s.php?Series=H

again, the f22 and f23 heads flow very horribly...also obviously a dohc vtec will yield larger gains the a sohc vtec

the fseries is probably the best boost application everyone overlooks (due to the hseries)...it already has perfect compression (although some bump it up a little) and iron sleeves

problem with the fseries is poor selection with internals...they are out there but only a limited selection will make pistons, rods, valves, etc

going n/a you'll be spending tons of cash trying to break 200whp...turboing and you can hit 250whp easy

the thing about the fseries and hseries is most parts are interchangeable with a few minor adjustments...people have been swapping heads, rods/pistons and what not back and forth

hope this points you somewhere...sorry for being so vague but it's late

azian21485

you can say it started as an f22 but it definately doesn't resemble that motor anymore...plus the amount of money, work, research put into the entire car is something only 1% of the motorsport population is willing to do

azian21485

i forgot to add that you can't compare the h22a and fseries due to too many variables as well

shineynitelite

how fast was that crx??

agranado

so lets say I wanted to swap out all the internals and upgrade them... what exactly would have to change?

what can be done about the head for better flow?

would higher compression be better for the engine or worse?

and once you do all the internal work, what kind of boost would a turbo give then w/all the upgrades..

signed,
a technical

-Alex

azian21485

http://www.bisimoto.com/

azian21485

concerning the internals....sort of a vague question....do you want to use aftermarket or use h22a rods and pistons? if you want to use h22a pistons, you'll need to use h22a rods. and i'm sure the h22a1 (and no other model h22) crank

you just have to look at the fseries as just another engine....basically they all do the same thing and work the same way...it depends how they are designed which will determine how they will flow

main thing people do is increase throttle body...the h23 i believe bolts right up and is a little larger than the stock f22...but there's a company that offers services to bore out the stock f22 throttle body and is a few mm larger than the h23 throttle body...i forgot his name but i'll look into it if you want

the same ol' porting, valvejobs, etc....basic headwork....but like said before...you won't change the port geometries of the head which is what will really be holding you back...shit i doubt you'll flow better than a stock kseries =)

how high do you want compression and what application?

boost depends on what size turbo...but i'll throw out an example for you

http://www./forum/show...ighlight=boost

to be honest, i'm really the wrong person to be answering these questions because i don't need to know this stuff (i just know the gist of it) based on what i do with my car...but i'll give you some links to filter through

hseries head on fseries block
http://www.accordinglydone.com/forum...highlight=f22a

h22 crank/rods/pistons in fseries block
http://www.accordinglydone.com/forum...ght=h22a+crank

accords have been building the fseries for years...i highly suggest you look at www.accordinglydone.com ...it'll have more info than you'll probably need

agranado

agreed - and now im off to class

-Alex

CL Platano

Pick up the latest Honda Tuning magazine they talk about an non vtec F22b ( Prelude Si motor 92-96) swap into a 90-93 Accord. They also talk about a H22 swap into a civic. I want to write them and tell them to work on a CL for christ sake.