I did a forum search for threads that might be able to shed some light on this but I came up empty-handed. Do any of the FI kits address the VDC and how it cuts fuel, or do you basically just have to remember to turn it off every time you start the car? I am mainly concerned with the single turbo kits (APS and Turbonetics) because when its time for FI I'm gonna go with one of the two.

 

you can disable it

 

The VDC works like before, no problem to report. I disable it most of the time, except in the rain.

 

One of the stores claim that you have to turn it off because when it reduces power it closes the throttle and reduces the fuel and makes it lean. They claim a customers car was damaged due to this.

Of course it reduces fuel, because the throttle is closing and consuming less air. I have had my kit on for over a year and only turn the VDC off for track driving. I have had no problems and have had VDC turn on a few times when I was doing something stupid. It is a non-issue.

 

This has been discussed plenty of times before. VDC works by first closing the throttle body (this can be verified by watching your boost guage). If more control is need VDC has the ability to cut fuel. Fuel cut is typically a yes/no thing, either ALL fuel is cut or no fuel is cut (as reducing injector duty cycle can lead to unpredictable combustion). If ALL fuel is cut you will NOT run lean, as combustion will NOT take place. If there is no combustion you can not run lean.

The area that I don't believe was ever figured out completely is what happens AFTER VDC shuts off and your still have your foot floored. How fast does the throttle body open back up and how quickly can the engine repspond to high boost

 

no i meant DISABLE meaning disconnect the fuse, not push the button to turn it "off"

 

But then, aren't you left with your SLIP, ABS, and one other light on all the time?

 

No just reads as VDC off everytime, till you connect it again.

 

the VDC and SLIP light just stay on

the car reacts faster, faster throttle response, and VDC for sure doesn't kick in. Even when it's turn "off" it's not fully off


you do lose ABS

 

I have been running with my VDC on and the PE kit, I have had zero problems.

 

I wouldn't want to pull the fuse unless I was on the track. For road use, I'd prefer just to turn off VDC with the switch.

There's a site somewhere around here that sells a module that saves the VDC switch position in memory. Meaning, if you have VDC off and you turn the car off/on, the VDC will still be off. I forgot the site right off hand, I'll have to get the link off my work computer.

 

Maybe this one: http://www.kptechnologies.net/

 

Or, even better yet, http://www.KPtechnologies.com/

We bought the .com when it came on the market back in December and we've been trying to slow down traffic to the .net.

 

That's it.