I have a 505 C.I. 400 stroker bracket motor that makes 678 HP on E85 using a 1150 Holley Dominator converted to E85 with annular boosters, it has .150 stainless needles and seats in it. I use a #6 AN Teflon lined Stainless steel hose from the Magnafuel 4 port regulator to each carb. bowl, #6 AN I.D. is .375 I was able to enrichen the jeting on the engine dyno test one jet size from what that carb. came with and lost power by being to fat with that set up. I ended up jetting it down 3 jet sizes to make max HP and torque, that was on a DTS engine dyno in Klamamth Falls Oregon which is at 4300 Ft. above sea level I have not tried jetting it up enough to slow the car down in MPH at a 1/4 mile track yet, we race at Madras which is 2500 Ft altitude and it is a 1/8 mile track IHTHs