i bought a 90 gxl and the VDI valve is not connected to the acuator and the little vdi arm is bent in, so can i just remove the acuator, turn the vdi to where its open(it looks like all the way cw?) and wire it to stay there? will this cause me to loose alot of low end power?

 

*Not directed at the OP*

People who remove emissions from an S5 NA and disable their VDI and "wire open" their exhaust sleeves are idiots.

To answer your question, if your VDI isn't working, you will like your car a LOT more when it is. =)

 

either way sucks. wired open is best. you should try to get another VDI or upper intake manifold at worst case.

if you're lucky you can take it out and fix it. with it closed there is no power past 6k and with it open that powerband up there is worthless.

 

You could wire them open but as you even said you will lose low end power and MPG. I bought my motor with the aux system removed. Its a real dog below 4k, your best bet is to fix it like i am doing now.

 

i fiqured i can fix it and retrofit somehoe th the acuating rod, but im cheap and didnt want to remove it and get a new gasket. but i will. thanx.

 

If you still have the plug then the fix is easy.
Get yourself one of those 12v compressors out of an airhorn kit from autozone or someting (Like 25 bucks)
Then run the two wires from the white plug (VDI) to a relay.
12v from the battery, or fuse block if your fancy, to the compressor. Then ground to the relay, and relay to chassis. So when you hit 5800 rpm under load, the compressor kicks on and you have air suppy, yay!

Unfortunately your getting about 15lbs of air, too much for the actuator, so buy one of them plastic adapter jobs for about the size tubing your using, drill a very small hole in it, and put it in line with the hose that will be running to the actuator.

Before you hook everything up, connect it to a vacuum/pressure guage, jumper the ground connection at the relay to turn the pump on, and then use a knife or something to widdle out the hole in the plastic coupler until the pressure guage sees less than 3psi or so, hook it up and have fun

It's redneck, but it's cheap and it works. Some people who have never done this say "I wonder how long the compressor will last, it's not designed for extended use"
I have done it, compressors holding up fine for the past year, if it goes out about once a year, it's $25 15 minutes to replace.
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And why can't you just bend the arm back?

As far as gains/losses with VDI. I actually did back to back dyno runs. One with VDI closed, one with VDI open.

I lost maybe 3hp down low, but top end hp jumped from 118 to 133 with it open.

I've ran with mine open all the time, and to be perfectly honest I cannot tell the difference in low end if I try.

 

i thought just prying it straight would bend the shaft in connects too?

 

meh, if you take it apart sometime you'll see it's a really simply system. That rod just turns a one piece thing with two holes in it. You should be able to get away with bending it. Of course, use your better judgement and don't break ****, but a little love with a flathead screwdriver shouldn't hurt.

Look at it this way, if you snap it off, are you in a worse position than you are now?