FBO Systems.....

Well, my timing loop, told me that my initial likes around 30 and my mile per hour said 45 degrees was to much!(I changed my timing 5 degrees at a time) but 40 was OK, I wouldn't have expected it to like that much timing!

When i lean my carb, that may change and not like 40 degrees total.....which was what i was expecting.(spark plug base ring is Black)

Any ways, changing the advance plate wont take as long the next time around.