apex'i vafc
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apex'i vafc
who likes theres and is it useful on a SOHC VTEC motor(f22b1). i want to lower my vtec engagement point because i dont feel like reving the motor to ~5000 rpm to hit vtec. i also heard the car preforms better when it is set around 3500. is this true?
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Re: apex'i vafc (Razor)
Hey, I just found out recently that the VTEC switch over is at like 2300-3200rpm, depending on engine conditions and load, on the 5th gen F22B1. I was flipping through the manual and noticed that the other day. So I guess if you set it at 3500rpm it would actually be raising it?
I think basically the F22B1 works like a 12-valve engine when VTEC is not engaged. Like 1 intake valve and 2 exhaust valves, and when VTEC kicks in the other intake valve starts opening. Yeah that probably has nothing to do with what your asking, but I found it interesting, hehe.
Eddie
I think basically the F22B1 works like a 12-valve engine when VTEC is not engaged. Like 1 intake valve and 2 exhaust valves, and when VTEC kicks in the other intake valve starts opening. Yeah that probably has nothing to do with what your asking, but I found it interesting, hehe.
Eddie
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From: OMGWTFLOLHI2U2, UMPAPAMAOMAO
Re: apex'i vafc (Eddiebx)
Hey, I just found out recently that the VTEC switch over is at like 2300-3200rpm, depending on engine conditions and load, on the 5th gen F22B1. I was flipping through the manual and noticed that the other day. So I guess if you set it at 3500rpm it would actually be raising it?
I think basically the F22B1 works like a 12-valve engine when VTEC is not engaged. Like 1 intake valve and 2 exhaust valves, and when VTEC kicks in the other intake valve starts opening. Yeah that probably has nothing to do with what your asking, but I found it interesting, hehe.
Eddie
I think basically the F22B1 works like a 12-valve engine when VTEC is not engaged. Like 1 intake valve and 2 exhaust valves, and when VTEC kicks in the other intake valve starts opening. Yeah that probably has nothing to do with what your asking, but I found it interesting, hehe.
Eddie
all 16 valves work all the time
3500 is what i had my cutover at, dun reit has many others have as well
anyway back to this clown that does not know what he is talking about
THE HICAM CUTOVER STOCK IS 5250
the mid lobe(locked) is used between 2500-5249
and prior to that a mixture of the idle and mid lobe are used to create an intense swirl effect to facilitate some low-end torque
*Wink*
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From: sandbox, IRAQ, IRAQ
Re: apex'i vafc (Razor)
who likes theres and is it useful on a SOHC VTEC motor(f22b1). i want to lower my vtec engagement point because i dont feel like reving the motor to ~5000 rpm to hit vtec. i also heard the car preforms better when it is set around 3500. is this true?
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From: Bloomington, Indiana, USA
Re: apex'i vafc (Eddiebx)
I think basically the F22B1 works like a 12-valve engine when VTEC is not engaged. Like 1 intake valve and 2 exhaust valves, and when VTEC kicks in the other intake valve starts opening. Yeah that probably has nothing to do with what your asking, but I found it interesting, hehe.
[Modified by nickh2k1, 4:55 PM 6/1/2002]
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From: Bloomington, Indiana, USA
Re: apex'i vafc (Razor)
yes it will be useful regardless of the transmission...but i'm not sure if you will get a whole lot of added power by bringing the vtec engagement down to 3500 rpm's!
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From: sandbox, IRAQ, IRAQ
Re: apex'i vafc (Razor)
i dun think you can adjust the idle, basically your changing the vtec point and then it lets you correct the fuel mixture for the added air, you will need a dyno to get the best results but misa or i can give you the setup that im using now.
it lets you monitor the revs, throttle position as a %, fuel correction, pressure,vti, vto i dunno what the last 3 are lol.
it lets you monitor the revs, throttle position as a %, fuel correction, pressure,vti, vto i dunno what the last 3 are lol.
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From: chattanooga, tn
Re: apex'i vafc (Sabastian)
i thought the f22a's were the ones with vtec? f22b series were non-vtec??? anyways, it wouldnt matter what rpms you engage vtec at, its still going to be a slow piece of crap
get a motor swap if you want to go faster
get a motor swap if you want to go faster
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From: OMGWTFLOLHI2U2, UMPAPAMAOMAO
Re: apex'i vafc (urbantrain)
i thought the f22a's were the ones with vtec? f22b series were non-vtec??? anyways, it wouldnt matter what rpms you engage vtec at, its still going to be a slow piece of crap
get a motor swap if you want to go faster
get a motor swap if you want to go faster
silly white boy,
much have yu0 to learn about the force
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Re: apex'i vafc (Sabastian)
Ok, I said outside of VTEC the engine acts like a 12 valve. This is because one of the valves open up only enough to make sure fuel doesn't accumulate in the intake port. I might not have been clear before, I mean all 16 valves are still working, just that one of them opens slightly so thats why I said it acts like a 12 valve. I believe they did it like this so that there will be a swirling affect when the air and fuel mixture comes in at low RPM. And if you don't believe me, go open up the 1994 service manual and take a look for yourself, unless those "CLOWNS" over at honda are screwing with us too.
Eddie
Eddie
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From: OMGWTFLOLHI2U2, UMPAPAMAOMAO
Re: apex'i vafc (WadZii)
Eddie is right.... for the 5th gen sohc vtec engine vtec comes in between 2300 and 2700 depending on throttle possision. if i had a digi cam i would take a pic of the cam to prove it to you people. when not in vtec only one intake valve opens fully, the 2nd one only opens enough to prevent fuel from pooling ontop of the valve. then when vtec comes in it opens both valves with slightly more lift than the one does when not in vtec. the vtec in the f22 was made for fuel ecconomy, not power. the 15 extra hp come from a better exhaust, a better exhaust manifold and a better intake system. for all of you with a ApexI Vafc. set the monitor to Vti.... vti comes on when the ECU says for vtec to come in. and 5250 for vtec is BS, even in my h22 it came in at 5000 stock. you people need to know the facts b4 you go bashing people
the stock hi-cam cutover is 5250, and im not talking about the other mesly little lobes im talking about the rockers locking and the HI cam being used. VTEC is a SYSTEM of valvetrain parts, not somesort of 'EVENT'
cam switchover is an 'event' not 'VT3C' y0!
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From: Kensington, MD, USA
Re: apex'i vafc (exaccord)
IMO the vafc wont really help such a stock situation. i think it would be best used with much more bolt-ons at least.
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Re: apex'i vafc (SOHCArchangel)
Dude seeing that you are pretty into your car, I am sure you have a honda service manual at home. Hows about you open it up and take a look at it. There's a great section in there explaining how VTEC works, oh my bad, I mean this "SYSTEM or valvetrain parts" works. Here, let me make it even easier for you, go to section 5 and read pages 4 through 7. I wouldn't want you to ACCIDENTALLY skip over those pages. Sorry, I don't have a scanner avaliable right now so I can't scan them in for you.
Eddie
Eddie
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Re: apex'i vafc (4doorH22)
IMO the vafc wont really help such a stock situation. i think it would be best used with much more bolt-ons at least.
I was wondering if the VAFC is good on B16s. The VAFC did wonders for my midrange on the H22. Just by lowering the VTEC crossover I think I gained like 18 HP at 5000 rpm. I really want a Hondata for control of the ignition maps as well.
I was wondering if the VAFC is good on B16s. The VAFC did wonders for my midrange on the H22. Just by lowering the VTEC crossover I think I gained like 18 HP at 5000 rpm. I really want a Hondata for control of the ignition maps as well.
, sorry.Eddie
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Re: apex'i vafc (4doorH22)
Have you actually held a camshaft in your hand and looked at the intake and exhaust lobes? Ever taken off your valvecover and adusted your valves?
.Eddie