anyone that has a vtec controller....

how much difference does it make to have a vtec controller?
anyone have pictures of it? or have times before and after of their car in action?
please post it if yall have any info....

 

By itself, very little. The only time you might consider getting is a VTEC controller is if you got bigger cams, were moving the VTEC point would be advantagous when tunning. As for the fuel aspect of it, it seems to do a better job taking out fuel than adding fuel but if you just have bolt-ons then it wouldn't be worth using. The honda ECU can handle pretty much most bolt-ons just fine.

 

[img]C:\pics\Vafc1.jpg[/img]

Here's a pic of it

 

your picture didnt work dude....


how much of a difference does a vtec controller do?

 

I have the Field's unit, and here's a pic:

 

hey...
do you notice any difference in power or speed?
like have you been to the track or anything?
did it decrease your track times?

 

with the aftermarket fuel/vtec controllers, it allows you to tune your car to extract the most hp. Just by pluggin it in, you arent' going to get instant power. The way to verify your results is to have your car hooked up to a dyno preferably with an air fuel meter that plugs into your 02 sensor.

 

i know that...

but i want people's experience that have vtec controllers...

do they really work?
i have heard that they dont work....

people who have em...please verify...

 

The VAFC and FPR helped to extract more power out of the car by tuning the fuel to run best with your mods, which is important. But tuning the cam gears will put the power where you want and need it.

It takes more than just a VAFC to make power. Without cams and other go fast goodies, the VAFC is just a cool looking waste of money.

 

I've got one and the only thing that its done for me is abled me to lower my vtec. The ecu compensates for the fuel correction so that does nothing (it can actually slow you down if you adjust it too much). I went to the dyno and did a baseline test with the vtec and fuel set to stock. Then I did another run where I lowered my vtec to 5500 rpms and leaned my fuel out by 2% during vtec engagement and I gained close to 5 hp and 3 ft/lbs of torque. For the money I would not get it if I could do it over again, but then again it is a panty dropper.

 

wut the hell that little power?
why the **** do people get it then?
did you adjust the settings right?
did ya lower the rpms for the vtec to engage at 2k rpm?

 

You have a GS-R and you lowered your v-tec to 5500 rpms??? V-tec kicks in at 4400 rpms in a GS-R.


[Modified by 2K1 GS-R, 10:30 AM 9/26/2001]

 

honestly I thought it was 5400 or 5500 rpms


gsr vtec engages at 4400???


[Modified by kendogg, 10:19 AM 9/26/2001]

 

OMG both of yall are stupid *** mother *******...

it doesnt engage in 4400!!! ******* stock it engages at 5500rpm


does anyone know much much power vtec controller does?? if you lower it to 2000rpm?

 

I "heard" if you lower the rpms to much it can actually slow you down and lose power...

 

Dood, calm down.

And also do a little more research before u make a comment like that. Actually v-tec does engage at 4400 rpm, that is the first butterfly valve of v-tec. The secondary butterfly valve opens up at 5400 or 5500 rpm, that is the one people feel most about and where it gets loudest at.

 

ChunChoi, are you a newbie into this performance issue?
Let's investigate how much you really know...we'll all be probably wasting our time answering your question if you don't even know what we are talking about...

Do you know what VTEC does, and how it affects your motor? Do you know why VTEC kicks in at a certain RPM? Do you know anything about air/fuel ratios? Do you know what's tuning?

A VTEC controller is useless for a stock motor... The stock VTEC switchover is already very well tuned, and pushing it either lower or higher will cause a drop of power. If you switch VTEC at 2000RPM, all you will get is a racing cam profile at low RPM's. Have you seen true race cars drive at low RPM? Have you ever wonder why they sputter so bad and become so sluggish? I doubt you will understand why, but learn about the fact first. Also, if you put the VTEC higher, all you will get is a flattened out powerband after the optimum switchover. Unless you have work done to your motor that affects the way your motor breathes (such as camshafts, headwork), there will be nothing to tune to extract power playing with the VTEC switchover.

Another purpose for a common VTEC controller (ie: Field SFC-VTEC, APEXi VAFC) is tuning the fuel. You can either increase the fuel or take away fuel (richen/lean out). For example, when you install an aftermarket intake, your engine will take in more air. Therefore, you will need more fuel to offset the air increase. That will give you more power because it will bring you back to the optimum air/fuel ratio (14.7:1).

About your question HP gains... it totally depends on how "off" your settings are. If you are running very lean, you will get good power by adding fuel. If you got a set of cams and the stock VTEC is either too early or too late, you will get a smoother powerband. If your car is stock, sell the damn VTEC controller if you don't plan to mod your car.

Tell us what you have in your car, and we can probably estimate what kind of gains you will have from a VTEC contoller. Stop asking us those retarded questions about how much HP you will get and how many seconds you can shave off in the 1/4mile...

BTW, GSR stock VTEC switchover is at 4400RPM. 5800 is when the secondary intake runners open up (and it magnifies the engine's sound). Don't ever get VTEC and intake runners mixed up.


[Modified by Tony the Tiger, 4:05 PM 9/26/2001]

 

Well put Tony.

 

VAFC ROCKS!

 

good ish Tony you're Grrrrreat!

 

Well said. I hope Chunchoi looks before he leaps next time. It's an honest mistake to make, but there is no need to be an *** (for lack of a suitable word). You will neither gain freinds nor help with that type of attitude anywhere you go. Consider it lesson learned and lets move on.

 

thx tiger...finally...someone actually answered my damn question....

 

i think just about EVERYONE who replied answered your question.

 

Well stated Tony.

BTW, it should be noted that the VAFC corrects fuel by editing MAP readings. To richen the mixture, it raises the readings and to lean it lowers them. The stock ECU will throw a MAP code if it "detects" boost. (Just ask some turbo owners). Thus there is a limit as to how much you can richen by raising your MAP readings. How much that limit is depends on how close to vaccuum you are at that given rpm. Thus, I'd recommend a VAFC for leaning purposes.

One fun thing to do with a VAFC is turn your VTEC way up for drama factor. You lose power, but when VTEC kicks in you spin the tires and amaze the **** out of anyone riding with you. I'd never leave it this way, but it definitely snaps your neck back.

 

nah tony was the only person that gave me the info i needed....
he had detail...everyone elses thing was like one sentence....