Watson Headers/Haibeck Chip

[Hammer]

Originally Posted by XfireZ51

I had a Marc Randolph chip in my car when I added Watson headers. I found that I needed to reduce the timing due to eliminate the knock retard. After putting the headers on, the trap speed didn't change. The ECM was backing off the timing. After modifying the Sprak Advance tables, I was able to pick up about 4mph in trap speed. FYI. I would do a "before" and "after" and a scan.

I don't have the equipment to do a scan, but have numerous ET slips with 109 mph trap speeds. We'll see what the new traps are in the spring. I would be happy with 113 mph.