[jpnovak]

Background.

stock 78 SC 3.0 motor. SSIs, weber 40s. properly jetted and float bowl height.

I just did some suspension upgrades on the ST. The car performed flawlessly except for two turns.

Yesterday at the track I was getting serious fuel starvation under hard cornering. The two main corners it happens are left hand, tight turns - one sharp uphill (think near-switchback) and one off camber slightly uphill.

The car comes into the turn under hard braking in a straight line. This is followed by maintenence throttle to balance/rotate the car on turn in. Then hard acceleration to transfer weight before apex. Turn-in rpm is about 3000.

At this point the carbs responds well to initial load then surges (lean surge?), then sputters, looses power (drastically) and 3-5 sec later recovers back to normal power levels after the car straightens out.

I assume that this is a fuel starvation caused by sloshing fuel. I think the delay at apex is masked from the accel. pumps giving a shot of fuel. Any suggestions?

I have searched the archives about the float bowl mods including shaving the jet mount and installing a fuel dam. I assume my problems are on the right side bank. The left hand cornering would cause the fuel to slosh to the right leaving the pickup on the left side of the carb dry.

I will make and install a set of dams but need a few questions answered. How high from the bottom do you install the dam? Does it sit on top of the rib from the main jet opening or higher? How far across the float bowl does it go? 1/2 way or more?

Just looking for some previous experience.

Thanks