I'm pretty happy at the minute, I've finally sorted out a tuning issue I've had since fitting the MS and it was all in the spark table. The problem was that at cruise and light, slow acceleration the car would bog slightly and throttle would would seem stiff and clicky making the car hesitant to cruise (spiking lean at points). I always though since I was running a slightly more advanced spark map based on the PnP map and that my spark table was very similar to most mk1 cars that it couldn't be that at fault and was determined it was the VE tune and AE that was off. How wrong I was - It was spark!
Here is my old map
And here is the new more vacuum aggressive map
Roughly adding in approx 10deg advance to my 2000rpm/50kpa region and shifting the rest of the curve in earlier to match this has resulting in making the throttle so responsive now that the car just pulls instantly and my AFRs are much more solid.
My MPG was so shitty too at around 20MPG (city driving) and the revised spark map has already shown my city consumption go up a fair bit. I guess it's a safe bet to say Im getting much more torque at lower loads now to factor in my MPG increase.
I've seen some of you guys running similar advance at low load on built and stock mk1 engines but most of you running around 10deg less than me at slow cruising loads which is nearer to the PnP values, I can only asume that my compression ratio in the NB has alot to do with it?
I also want to ask if this amount of advance at such low load areas of the map could be detrimental in any way to the life of my stock engine? I have some det-cans and will do some tuning on them but wanted some of your opinions on it too. (The boost regions are purposefully safe shall we say