Building a 10k RPM H22A?

[MidGa93EX]

9,500+ Streetable RPMs from an H-series, or maybe even an F???
10,000+ Race motors???

With a completly forged bottom end, and serious cam/valvetrain mods, could this be a feasible semi-streetable motor, or better yet somewhat reliable?

I know 10k+ B-series motors are easy, and the f20c is close from the factory, but I want some S2K revs in my CB!!!!!

THIS IS JUST CURIOSITY!!!!!!

I'm just getting ideas for the very distant future. I know that pretty much anything is possible, but usually unrealistic or just plain $$$$$$!

[gloryaccordy]

Just plain $$$, plus think about the power band...if you wanna make power throughout you NEED serious, custom designed cams...all those cams that are out for the H22 are made to make power up to maybe 8500RPM tops. Furthermore, you'd need a perfectly balanced and blueprinted bottom end, higher than stock compression, and a perfect fuel map from hours and hours of tuning. Is it worth it? That's really up to you to decide; but in my eyes 300WHP for $10K+ is not worth it; you'd need a custom final gear (think 5.5:1+) and all kinds of stuff, plus your mileage would be shit.

Personally, I think a good project to do would be to build an H22 on an F22 block. The heads are relatively easy to get, Scat makes crankshafts for ~$400 and you can get custom rods and pistons. You lose some displacement from the F22/H22 (maybe 50-55cc, .05 liters) but who cares? Tune it, get some good journal bearings, an oil cooler, maybe some cams, rev it to 8000rpm and make 200whp with bolt-ons. Way cheaper and more useful than a 10Krpm primadonna H22 IMO.

[ZigenBallZ]

You lose some displacement from the F22/H22 (maybe 50-55cc, .05 liters)

H22 = 2156cc
F22 = 2156cc

or do you mean a 90.7mm stroke with an 85mm bore? Which would drop you roughly 100cc down to about a 2055cc displacement. You weren't really specific when talking about the crankshaft...



If someone really wants to rev to 10k and needs to ask about it...just buy a sportbike...

or start with an F20B and be happy with 9k...

[kamaccord]

There is a story in the current issue of Honda Tuning Magazine about building an all motor H22 for about $3000 in 3 stages averaging $1000 per stage. Very interesting article! Good luck!

[Rick Solis]

Why would you wantto rev to 10K?

What purpose would that serve?

[DrLove'sKuDang]

personally i think its unrealistic and unnecessary. an itr motor probably peaks around 8k, they need to rev that high to make power cause they have less displacement. if you get yourself a h22, youll make the same power but at around 6800 instead.

get yourself a stock h and a set of cams and youll be revving to 8k. i did. eventhough peak was at about 7100, the drop off wasnt too drastic, so i could rev to 8ish and still get pull out of it.

[MidGa93EX]

I wasn't seriously going to try to do this. I was just throwing the idea up in the air.

I was just thinking about the beautiful sound of 5 digit revs and how it would blow peoples mind coming from under the hood of a CB.

If want that kind of revs i'll just get have to wait until I finally get one of these bad boys:

CBR1000RR

Hayabusa

It would probably be cheaper than building and tuning that motor anyways!!!

Thanks for the interesting conversation.