Originally Posted by
Dirtdobber
My first race with it I was chasing my tune all day with the 6.5mm venturi. I put the 8mm venturi in and was "starting over" with the tune. While running today, I felt like the low end might have been slightly lean. Just trying to pick everyone's brain on tuning this beast. My last .21 was a RB S5, so I'm going from mild to wild.
I got over eight gallons on my FMS. How many gallons do you have on yours?
It take about two gallons before the engine is fully broken-in and holds a tune. I found my FMS likes only two pipes the 9901 and the 9886 with the 41021 manifold. Once broken-in I run a cold plug like a 99t. I run my FMS in a buugy.