I mix 1-2 gallons of C-111 to a tank
I should also say that the pipe is wrapped, this helped clean up the mixture lots.
mine has ran strong for a 1000 miles now with out a problem and on long heavy pulls I see 1350's now and then too. check your pistons and plugs though.
i called boondocker and they told me to try tuning more with the PSI numbers than using the big negatives (-10 to -15)in the 3000-5000. i can't get mine to run good without using negatives, it's just really boggy.