Nate'* back in town today with his scanner (sorry Nate, I wish I'd looked closer at your mani'* after I picked them up from the shop -the unwelded cracks make me sick. Hope the new ECC helps to make up for the somewhat wasted trip).
I installed the E-prom that Nytro67 had custom burned and after only 2-3 miles I was seeing up to 17.8* advance(!) *with* 2-3* KR. Does this mean it'* still running stock L27 timing advance, but my car is tuned to run approx. 16-17* efficiently?
Also, on the last drive with the stock L67 chip I kicked it down at 10-15 MPH and at 3500'ish rpms the car would all of the sudden just take off -literally pulled a LOT harder than I ever recalled.
Literally pulled like I'd never felt it pull before. Wish I had the scanner on when it did that so I could see some of the parameters.
A little less power now than before I put the new e-prom in, but I've only got like 8 miles on it so far.