Originally Posted by jjjaffo
I read your article and it seems to make some sense. I'm really not sure if I'm still on the transition circuit or not at speed. At 60 with a 3:42 gear, 27 inch tall tire and 2400 stall convertor I'm at about 3 grand on the tach. I don't really know when it gets on the primary circuit. Any help for me?
there isn't really a hard and fast rule on the rpm that the engine will be on the mains, it is more of a throttle opening amount and engine demand issue, but you are in that range of switching from one to the other.
I'd try the jump to 75 jets, if it doesn't seem to help much then you know you're not up on the mains yet and need to be working on the idle/transition circuit.