when does the v-tec engage on a 99 accord ? is it around 3 ... 3.5 rpm ?

 

try search... and btw: it's vtec not v-tec.

 

i did try search ... couldnt find what i wanted yea i noticed that oops vtec. so do you know the answer to my question or do u just like to point out the obviouse ?

 

well atleast he didn't say vTeCh y0

 

I pretty much want to know too....since i got a 02 accord 4cyl
and the holy vafc is gonna come within this week or next......

 

guess no one knows then ?

 

the vtec in a v6 kicks in at 3500 rpms

 

I don't know when mine kicks in...I didn't ever notice it with it being stock and now that it has a turbo I really can't tell cuz of the sound of the turbo spolling up. I think it is around 3500 tho..Try a vfac or open up the intake and exhuast and you might just be able to hear it.

 

why does it matter? its just VTEC nothing special

 

amen

 

i think i hear it at 3.5... someone else tells me it's 4.5... (on I4) why are you getting a vafc? i heard it does pretty much nothing for the I4?

 

it changes...its variable depending on load

there's a range of rpms, but i forget what it is...pretty big range...like 2500-5000

 

Where exactly did you hear this?

 

au contraire...

 

and do you think it will do something for a v-6? messing with vtec wont really help you unless you really really know what you are doing. air/fuel tuning will, of course depending on mods.

 

i got a 4 cyl with i/h/e lowered and extra 500bucks in my wallet..what should i do?
get 500 APC sticker and stick them to mad looking ricer? jk
i was looking for some engine management thing....any idea? for 500 or less
just spend 245 for eibach

 

u heard worng

 

vafc and dyno tuning

 

The F23 has a variable engagement VTEC. depending on MAP sensor voltage and throttle position it will engage anywhere between 2300 and 3500. The V part of the V-AFC won't help you out too much. VTEC on the F23 is mostly for fuel economy and Honda got the X-over pretty much correct

 

Ive seen both NA and FI cars benefit from vtec being as low as possible

 

em....apex'i vafc -->vtec and air/fuel tuning? or only vtec?

 

Both.

 

There was a whole thread on VAFC awhile back... let me find it...

https://honda-tech.com/zerothread?id=198319

lots of info... and it is correct, F23 I4 VTEC x-over is variable, it can open as low as 2300 as indicated by my VAFC... and the x-over setting is useless for I4s because the the lowest RPM the VAFC can set the VTEC x-over is at 3100rpm.

I didn't connect up the VTEC x-over of the VAFC, only the a/f part. I am using the VTEC x-over to actually control when my n2o starts spraying...


[Modified by TWG, 8:23 PM 9/9/2002]


[Modified by TWG, 8:23 PM 9/9/2002]

 

all I4's or just the F23?

nice idea.

 

The VAFC wont let you go any lower than 3100.