...is the Gunson Colortune. I was out playing with the carbs this morning and decided to purchase a colortune to see where I actually was on the mixture. I learned two things: 1) I was running the motor much leaner than I thought, and 2) I was turning the mixture screws the wrong way...when I thought I was richening the mix, I was, in fact, leaning it out. I used the #1 and #3 cylinders to take my measurements. After getting the mixture right to "bunsen burner blue" at idle, I synched up the carbs. I also use a carb synch tool to help me balance the front and rear carbs. I know this is kind of like "cheating", but at least until balancing the carbs becomes second nature, I do like having these "crutches".
The end result was I got the 1275 running smoother than I ever had. I had to stand behind the car for a little bit just to listen to the much more pleasant exhaust note. On the test drive the motor ran through all speed ranges smooth as a baby's butt and it accelerated nicely. Now, we just need some warm weather to get out there consistently!
The end result was I got the 1275 running smoother than I ever had. I had to stand behind the car for a little bit just to listen to the much more pleasant exhaust note. On the test drive the motor ran through all speed ranges smooth as a baby's butt and it accelerated nicely. Now, we just need some warm weather to get out there consistently!