This engine is running very strong. I have a 600cfm mech 4150 carb. The fuel pump seems to be adequate the floats may be just a bit towards the rich side.

last run I noticed a hesitation when I hard braked from brief WOT. I wonder if it gets too rich from the float bowls sloshing forward or if it causes a lean condition?



.150 Stroked Y-Block:327.25 ci @ >1hp per ci
 

"For the Brawler carburetor to operate correctly, the float levels must be in the middle of the sight glass."
I adjusted the secondary float 1/8" below the marks in the middle of the sight glass, after full throttle the engine returned to idle then hesitated and almost died, I pumped the gas and the engine reponded and began to run normally. the secondary float was 1/4" then returned to 1/8". The fuel pressure is around 7 psi at first idle, then after I run it and the psi reads around 3.5. This excersize leads me to beleive that I overlooked the need for an adequate fuel pump. After reading this post "Any FE fuel pump from 1958 thru 1976 will bolt up"  I finally understand the need for a high volume pump, it seems an FE pump is a solution. THANKS!




.150 Stroked Y-Block:327.25 ci @ >1hp per ci