While the valve cover was off to adjust the valve lash, I spent some time to clean it up.
Interesting, I have an S4 from 1990. Do I understand it correctly that the current goes directly from the light switch to the headlights without passing a relay when the spider was delivered from the factory?Today I finally installed the headlight relay kit I ordered months ago. Not to difficult a job even with all the cleaning, re-routing wires, rust removal and painting the headlight buckets. Good news is everything works as expected, and while the lights are only 10% brighter, it does translate to more speed and confidence driving dark country roads.
Happy New Year!!
Interesting, I have an S4 from 1990 for the European market and i only have the cam advance solenoid on the intake side. In your picture i see it on the exhaust side as well. Is this a California spec or what?
I was wondering about that myself.
I have a 91 S-4 Spider.Interesting, I have an S4 from 1990 for the European market and i only have the cam advance solenoid on the intake side. In your picture i see it on the exhaust side as well. Is this a California spec or what?
Thanks all for the clarification.I have a 91 S-4 Spider.
Durning a rebuild a 2nd VVT was added to the exhaust cam. You can adjust the advance of the VVT with shims to get any advance you want and can control at what rpm you want the advance to come on for either just the exhaust or the intake or both so each VVT can be control separately with a programmable FI system. I have an Autronic SM2 ECU that controls the FI system.
The VVT's are both set at 6 degrees advance.
Initial timing is set at:
When the advance is turn on:
I never pursued testing different advances at different rpms on the Dyno after the engine was done, but the above advances was tested "on" the entire rpm range. Power was off a little at the top end and very close to equal in the midrange.
Someday I would like to try advancing the exhaust VVT only at top end and advancing the intake VVT in the mid range to see what happens.
Sorry for the long reply.