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Old 02-22-2008, 04:46 AM
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f20b

i am trying to research the f20b motor to see if it is really worth swapping it over an H22 one thing i cant find out is why the f20b can rev higher than the h22 i read somewhere it has an 8900 rpm redline
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Old 02-22-2008, 09:52 PM
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i would go with the f20b if your going to boost
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Old 02-23-2008, 01:31 PM
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f20b is 2 liters, it needs to rev higher to extract more power...8900 that's a bit too high lol!
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Old 02-25-2008, 10:57 PM
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it revs higher to extact more power but that still doesn't answer my question. What makes it possible for it to rev higher....basically what components on the motor enable it to reach higher rpms that is my question. I did search and they all say exactly showed me in the link i dont want the specs of the motor i want to know how its able to do that.
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Old 02-25-2008, 11:02 PM
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im not 100% on this answer but it could be possible thru the compression ration, cams, and other stuff. but im guessing mainly bcuz of the cams and compression ration. but like i said im not 100% sure! just tryin to help out a lil bit.
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Old 02-25-2008, 11:15 PM
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Compression ratio wouldn't make the engine be able to rev higher. Apparently the F20B has 11:1 CR which is pretty stout for a stock engine, but a higher compression ratio will yield more power, not make it rev higher.
To get an engine to rev higher, you need to lighten alotta the moving parts, i.e. pistons, rods, crank, valves, etc etc, but I have no idea what the F20B's internals consist of. Maybe they're much lighter than H22's, idk.
It also has a bore x stroke of 85mm x 88mm, as opposed to our H's having 87mm x 90-95mm, so I guess this could translate into smaller parts = lighter parts.

Thats my edumacated guess.
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But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 02-25-2008, 11:25 PM
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i knew somebody would be a lil more "edumacated" than i could answer. lol. i stand corrected. ah well... i tried. lol. im still learning my self!
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Old 02-25-2008, 11:42 PM
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hey, the day that you stop learning new things, should be........................... (trying to sound intellectual).....................




the day you die.


ok that just sounded morbid. on me.
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But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 02-25-2008, 11:44 PM
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haha. nick that was hilllllll-LARI-ous!!! haha
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Old 03-02-2008, 12:40 AM
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twokevlv6coupe the answer you game me, makes sense.... i did some other searching in general and that explains why i have read somewhere that a lightened flywheel can make you rev up faster so i guess a combination of what you mentioned can give the motor a higher reving range.
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Old 03-02-2008, 12:44 AM
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so lets say i was to get an f20b motor how would i get it to have more torque
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Old 03-02-2008, 01:13 AM
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Quote:
Originally Posted by slvr92lude View Post
it revs higher to extact more power but that still doesn't answer my question. What makes it possible for it to rev higher....basically what components on the motor enable it to reach higher rpms that is my question. I did search and they all say exactly showed me in the link i dont want the specs of the motor i want to know how its able to do that.
http://www.honda-tech.com/zerothread?id=1057251
(PLEASE READ THIS THREAD)

Quote:
Originally Posted by slvr92lude View Post
so lets say i was to get an f20b motor how would i get it to have more torque
Tune it, build it...?

in all honesty, stick with the h22. More torque and a bigger displacement motor with a lot more aftermarket products plus knowledge on it. If you're trying to be, "different" with a F20B, then more power to you. I wouldn't mind the t2t4 transmission that comes with the f20b though...now that's a fantastic LSD transmission...
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Old 03-02-2008, 04:17 PM
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the bore and stoke makes it rev higher than the h22. it does has a slightly higher torque that lets say a b18. higher revs doesn't mean better or faster.
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Old 03-02-2008, 07:34 PM
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the bore and stoke makes it rev higher than the h22. it does has a slightly higher torque that lets say a b18. higher revs doesn't mean better or faster.
X2 to the max.
And it has the shorter gears to compensate for the larger RPM range.
It has the same power as an H22 but slightly less torque but it's also cheaper than an H22.
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Old 03-27-2008, 07:07 AM
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Maximum piston acceleration(maximum force on mechanical parts) will occur at a higher RPM in a shorter stroke engine. I mostly mess with motorcycles but IC engines are all the same.
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Old 03-27-2008, 08:48 AM
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Think about it... a smaller bore not only lightens the rotational mass... but a smaller stroke means less distance travelled per crank revolution = faster per crank revolution than a larger stroke
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Old 09-20-2012, 09:58 PM
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Re: f20b

i have a question that i have not found an answer for anywhere. i have a f20b in my 1996 civic hatch with a chipped p13 tuned with crome. now my problem is that when my vtech kicks in once i stop accelerating i lose idle anyone know of the solution for this
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