Well its clear to me that Mr. inspector1 does not know what the fudge he is looking at.
Its a three dimensional curve. RPM on one axis, engine load on another, and timing advance on the third. To find the timing number you find the intersection of RPM and load then read the timing value. Its simple but you obviously have never seen one before.
My real point was that its not easy to get an exact number.
But just for Mr. inspector1 here is a picture of a dog. Im sure he can relate to that better.
I got too many cars!! Insurance eats me alive. Dave
78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k