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vtec controller...

 
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Old 04-21-2009, 02:57 PM
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vtec controller...

Hey just wondering what you guys know about vtec controllers, how much one will set me back how well they actually work and what the installation is like for starters
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Old 04-21-2009, 03:02 PM
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Re: vtec controller...

basically you have complete control of when you want vtec to kick in. I was thinking about doing it problem is i dont wanna risk ****ing **** up especially since im not a master mechanic nor do i know much about the vtec controller, apexi makes them, search em on the web.
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Old 04-21-2009, 04:02 PM
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Re: vtec controller...

I just sold my Apexi VAFC last week for 100 shipped, it was tuned for a H22 with i/h/e/flywheel. It made the VTEC crossover smoother and more powerfull. You can also adjust your Air/Fuel ratio with it. It does a pretty good job for what its ment to do. As for installation its pretty straight forward but it does require splicing your ECU wires to wire it up(or just buy a plug and play harness for 125, kinda pricey tho). Its no substitution for a real tune on a chipped ECU but its nice for a fraction of the price. Plus if you live in cali like me and have to deal with SMOG while being OBDII its kinda one of your only options. Also unlike a real tune, when you get the VAFC dyno tuned(which you most certainly should) you can only tune at WOT(wide open throttle) where as in a tuneable ECU you can tune cold start, idle, etc.


VAFC - VTEC engagement point A/F ratio. 100-200 used. plus tune.

Tunable ECU - VTEC, Fuel maps, ignition tables, timing, datalog, and alot lot more. 500-700 tuned.
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Old 04-21-2009, 05:24 PM
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Re: vtec controller...

Quote:
Originally Posted by 2.2Lude View Post
I just sold my Apexi VAFC last week for 100 shipped, it was tuned for a H22 with i/h/e/flywheel. It made the VTEC crossover smoother and more powerfull. You can also adjust your Air/Fuel ratio with it. It does a pretty good job for what its ment to do. As for installation its pretty straight forward but it does require splicing your ECU wires to wire it up(or just buy a plug and play harness for 125, kinda pricey tho). Its no substitution for a real tune on a chipped ECU but its nice for a fraction of the price. Plus if you live in cali like me and have to deal with SMOG while being OBDII its kinda one of your only options. Also unlike a real tune, when you get the VAFC dyno tuned(which you most certainly should) you can only tune at WOT(wide open throttle) where as in a tuneable ECU you can tune cold start, idle, etc.


VAFC - VTEC engagement point A/F ratio. 100-200 used. plus tune.

Tunable ECU - VTEC, Fuel maps, ignition tables, timing, datalog, and alot lot more. 500-700 tuned.
Props

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Old 04-21-2009, 06:44 PM
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Re: vtec controller...

There's two you can buy. Something like the VAFC that 2.2lude mentioned is more of a piggyback ecu than just a vtec controller.

You can also buy units such as the VCON, which only move the vtec engagement point. Problem with that is that while the high cam might engage earlier, it the VCON unit isn't clever enough to move the high cam fuel map with the engagement point.
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Old 04-21-2009, 08:10 PM
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Re: vtec controller...

Thanks Smok3y


yeah Colin is right too, theres other units like the greddy that gives you a little more tunablity(lol i don't know if thats a word?). And then there's units like the VCON and Spoon controller that only changes the VTEC point, Colin pretty much explained the problem with them too.
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Old 04-21-2009, 09:18 PM
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Re: vtec controller...

Quote:
Originally Posted by Brash22 View Post
There's two you can buy. Something like the VAFC that 2.2lude mentioned is more of a piggyback ecu than just a vtec controller.

You can also buy units such as the VCON, which only move the vtec engagement point. Problem with that is that while the high cam might engage earlier, it the VCON unit isn't clever enough to move the high cam fuel map with the engagement point.
I actually have one of those in my lude. My friend kinda talked me into it. Now i really regret it. I set vtec to kick at 4500 rpm for like 2 days, then i was like screw it. 5200 is the perfect spot 2 keep it at. Like brash said, it doesnt move the fuel map to the vtec point u try and set it at.

Oh and i'm never listening to my friend again. Lol
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Old 04-21-2009, 09:40 PM
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Re: vtec controller...

Quote:
Originally Posted by 2.2Lude View Post
I just sold my Apexi VAFC last week for 100 shipped, it was tuned for a H22 with i/h/e/flywheel. It made the VTEC crossover smoother and more powerfull. You can also adjust your Air/Fuel ratio with it. It does a pretty good job for what its ment to do. As for installation its pretty straight forward but it does require splicing your ECU wires to wire it up(or just buy a plug and play harness for 125, kinda pricey tho). Its no substitution for a real tune on a chipped ECU but its nice for a fraction of the price. Plus if you live in cali like me and have to deal with SMOG while being OBDII its kinda one of your only options. Also unlike a real tune, when you get the VAFC dyno tuned(which you most certainly should) you can only tune at WOT(wide open throttle) where as in a tuneable ECU you can tune cold start, idle, etc.


VAFC - VTEC engagement point A/F ratio. 100-200 used. plus tune.



Tunable ECU - VTEC, Fuel maps, ignition tables, timing, datalog, and alot lot more. 500-700 tuned.
Chea!! glad you sold the vafc bro..i know you were trying for a while now...and you know your stuff man props
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Old 04-21-2009, 10:57 PM
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Re: vtec controller...

Quote:
Originally Posted by blackbb6 View Post
I actually have one of those in my lude. My friend kinda talked me into it. Now i really regret it. I set vtec to kick at 4500 rpm for like 2 days, then i was like screw it. 5200 is the perfect spot 2 keep it at.
If you watch a good tuner set it up, they'll do one dyno run wholly on the low cam, then another wholly on the high cam. Where the two torque curves cross over is where the VTEC engagement point should be. In the case of a stock (or even lightly modded H22) this will always be at or around 5200rpm.
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Old 04-22-2009, 12:54 AM
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Re: vtec controller...

lol as long as you dont get a regular rocket switch like ive heard of others do....i let my ecu do the work tho
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Old 04-22-2009, 01:07 PM
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Re: vtec controller...

I have a vcon laying around that came with my lude (not hooked up) but after reading this I think I'm going to say nay on hooking it up.
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Old 04-22-2009, 01:17 PM
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Re: vtec controller...

When the cams switch lobes...its like running a race cam. (The purpose of VTEC)

Well...if you set VTEC to engage earlier, you're not changing your fuel/ignition maps. Your engaging it while its still trying to spray fuel and spark for a lower lift, not so agressive cam profile. VAFC is just a band-aid, and tricks the ECU. A VTEC controller just adjusts the VTEC x-over point.

I have directions for installing the buddy club v-con if anyone is interested....PM me. Some of em don't come with directions.

I have a V-CON that's been floating around my room for like 2 years now.
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Old 04-25-2009, 10:59 AM
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Re: vtec controller...

yea sweet thanks for the advice guys...im thinkin now its prolly just worth it to spend the extra money to chip it instead
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Old 04-26-2009, 06:30 PM
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Re: vtec controller...

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Originally Posted by ShoofIsLudin View Post
Well...if you set VTEC to engage earlier, you're not changing your fuel/ignition maps. Your engaging it while its still trying to spray fuel and spark for a lower lift, not so agressive cam profile. VAFC is just a band-aid, and tricks the ECU. A VTEC controller just adjusts the VTEC x-over point.
The VAFC does only trick the factory ECU, but running a piggyback device (such as an APexi VAFC/VAFC II or AFC Neo) gives you the ability to modify your air/fuel ratios all the way up the rev range. So when you do engage the high cam you also engage the high cam fuel map. This is the key difference between a piggyback computer and a vtec controller.
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