pfb

The VAFC comes with a harness that requires splicing into the factory ecu wiring. An easy job, but many of us have opted for a custom harness that is plug-and-play without having to cut or splice any factory wiriing, allowing us to go back to stock painlessly.

Check the group buy section for the group buy on custom harnesses for $140.

MacK430

sup all, i was wondering if i could just install my vafc and tune it myself or would it be better to leave it to professionals to tune it for me.

Shamu

Although the settings here are a great starting point/reference, I would tune your VAFC specifically to your car through a dyno session. Each car is slightly different, and you'd want to make sure that your maximizing the benefits of the VAFC specifically for your S2K.

honda9krpm

How low can you go ???? hehehe
Im newish to this topic, but i would thought one of the primary objective of the VAFC is to lower the V tec engagement RPM. However most of S2ki seem to set the engagement at 5500-5800.

What's the logic for doing so??

Should there be any different if there is S/C???

How low has anyone gone to ???

johnR

Damn!!! Isn't that too low? Got a question for you though... have you had any problems with the check engine light coming on when you set it that low???

twohoos

My mods: JR filter, Hondata intake gasket, rad mat, Mugen tstat/rad cap, Spoon flywheel.

My settings:

VT Controller:
L -> H: 5500
H -> L: 5400
VTEC Unmatch:
H<<L: -5%
L<<H: 0
Throttle:
L/H: 10%/50%
Narrow Throttle: all zeroes.
Wide Throttle, LVt:
1K,2K,3K,4K,5K, 5.5K: 0
6000: -2
6500: -2
Wide Throttle, HVt:
4000: 0
4500: -1
5400: -3
5900: -3
6500: -3
7200: -3
8100: -8
8700: -10

Austin_S2000

Have any of you re-dynoed the settings? Have the settings drifted over time?

I would hate to have it drift leaner. Richer I can handle, because it's safer!

Cyber Logic

[QUOTE]Originally posted by Austin_S2000
[B]Have any of you re-dynoed the settings?

cbender

Here are my V-AFC settings for the turbo, in case anyone's interested or has some comments to offer.

1. Wide Throttle / LVt

1000 rpm -7
2500 rpm -10
3000 rpm -15
4000 rpm -1
5000 rpm 0
5500 rpm 0
6000 rpm -2
6500 rpm -4

Wide Throttle / HVt

4000 rpm -1
4500 rpm -2
5000 rpm 0
5500 rpm 0
6000 rpm -2
7000 rpm -10
8000 rpm -7
9000 rpm -15

2. Narrow Throttle / LVt

1000 rpm -2
2500 rpm -8
3000 rpm -12
4000 rpm -12
5000 rpm -10
5500 rpm -5
6000 rpm -6
6500 rpm -5

Narrow Throttle / HVt

4000 rpm -4
4500 rpm -4
5000 rpm -4
5500 rpm -4
6000 rpm -6
7000 rpm -7
8000 rpm -6
9000 rpm -6

3. V/T Controller

L => H 5900
H => L 5500

4. V/T Unmt

Hi << L -15%
Lo << H 0%

5. Throttle

Lo Hi
15% 55%

CRX 18

My HVT settings were
4000:-25
4500:-25
5000:-27
5500:-25
6000:-3
7000:-6
8000:-11
9000:-9
From other posts I have seen, the -25's seem pretty steep. Should I be concerned about this. I was also wondering about the wide open throttle setting. I noticed many people (including mine) have it set at 50% throttle. I was just concerned that when the throttle was not all the down but above 50% that the VAFC would start its corrections on a leaner situation than what it was dynoed at. My understanding is that the car's ECU goes into a (open or closed?...) loop in which it pushes the mixture rich when under load or floored like done on the dyno. Could this be a problem. I came up with the question because I was revving my engine slowly in neutral and noticed some problems like leaning out, but when floored it seems ok. Any info on both the subjects would be appreciated.