Installed Yitsbox VVIS Modification

[jantt]

ok so you don`t think my 1992 need it even if it works on Ben850`s 1993 ?

I will have the tool from ARD http://www.ardideas.com/ARD-Cam-Timing-Tool_p_146.html in a couple of days to set the cams.

[razorx]

@jantt: What is the serial number of your car?

[jantt]

YV1LS5506N2006993

[razorx]

Thanks. I think i have written down when Volvo changed the way the manifold is being controlled.

In the very first 20V's the solenoid that controls te VVIS manifold has been connected in a different way.
My circuit will work as expected when the vacuum line to the manifold and the vacuum cover are swapped.

[jantt]

ok thanks.
Then I am up for buying the swith and if you can tell me how I should connect the lines.

[razorx]

I found it in my old thread.

http://www.volvo850forum.nl/index.php/t ... 565.0.html
Google translate translates Dutch well.

Below sn 30699 lack power above 4100RPM

[razorx]

And above sn 30699 lack power below 4100RPM.

[jantt]

ok so are you saying that the swith will not do any thing for me even if swap the vacuumlines ?

[razorx]

No the opposite:
The switch will work as expected when you swap the vacuum line to the manifold and te vacuum cap.

[jantt]

Ok then I am still up for buying.
Will you send message to us who is written up if you make it again ?

I have already done this to my car and your switch could be the last thing to do :

1. Sanded down plastic on trottlehouse disc.
2. ultracleaned injectors.
3. KN filter
4. 76 mm intake hose to airfilter and blocked preheating from exhurst.
5. new raceheader, new cat and 2,5" simons exhurst.

that gave me 192 bhp and 255 Nm.

Since I have mounted two new racechips in ECU.

Got 0-60 times with app 7,03 - 6,70 - 6,55 - 6,83

Will now set cam 3 degres advance that should give better acc.