With almost two weeks gone by, with the new air box change and the advance of both intake and exhaust cams, I am still finding this to be most plesent, power still suprises me, and the smoothness of which the engine pulls through out the power band.
Before making these changes the car was smooth and strong, for a 97 model with 212k miles but compared to my 525i BMW at 60 and on the BMW would blow it's doors off. I have to change my point of veiw now. Pulling out and at highway speed the cars now feel very comparable. At 60 to 90 I think the BMW is still a bit quicker but the Volvo will at least now keep up and is very strong now thru those speeds.
From what I can tell the gas mileage has not been affected, if anything it may be a tad better than before.
Don't underestimate, mind you what these two little changes will do in turning these cars on, it works.
For those who want to check out what was changed,960/90 cam timing revisited [S90-V90] from tjts 1. Pics are there and so is more power.
Hope this helps someone
Poolman