I need some advice/suggestions.
I have a spec II R33 that I imported a couple of years ago and basically it has been running like a dream, and still is.
On the weekend I decided to play around a little with the CAS and discovered that when I advanced the ignition timing a little (about 3mm on the periphery of the CAS) I found to my surprise that the car was surprisingly more responsive off boost and seemed to come on boost even earlier than it usually does.
So I thought, great, I'll leave the timing advanced a little, the skylines got a knock sensor so I shouldn't be able to do any harm. Then the next morning when I went for a drive I got my next surprise.... The boost solenoid (Spec II only I believe) decided to switch the boost at around the 4K mark. Now I've always known that it had a dual boost solenoid but have never before seen/felt it work, I always thought that the difference in boost it offered was too subtle to notice so never knew it wasn't switching. Bonus. Except after about 15km's the boost solenoid is back to normal.
So I've got a car that is more responsive, uses less fuel and for about 5km's a day gives me the amount of power that it should do.
1. What is the correct way to set the timing on an R33 Spec II?
2. What is the factory ignition timing setting?
3. What ignition timing should I run for Aus conditions and Premium fuel?
4. How do I make my dual boost solenoid work all the time?
5. Are there many gains to be had modifying the factory computer without touching the Turbo boost level? Fuel economy, power?
6. Why does the car run better for the first 100 odd km's after I reset the computer?
7. What fuel economy do others get when driving at highway speeds?
Lots of questions I know. I'm hoping that someone has had a similar experience and sorted it out.