wecycle

Is it common to have fuel feed issues on a SA? On my last autocross run today the car bogged down about 10 seconds into the run. I noticed that I had only about 1/8 of a tank of Gas at that point. It staggered along for another 10 seconds then woke up for the rest of the run.
Do I need to run with at least 1/2 tank to avoid this?
Would a high flow pump help?
Is there a mod to the tank for this? (baffles?)

Rx-7Doctor

iTrader: (13)

Are you running a stock carb?

orion84gsl

iTrader: (5)

My GSL did that once going about 70KM/h around a tight onramp. It just bogged. I lifted off the throttle and went back on and she took off again. I think it was a centrifical force problem. It pulled the fuel away and starved the engine enough.

trochoid

iTrader: (6)

Fuel tank was definitely too low, stock or not.

wecycle

Thanks for the suggestions.

Seems like the solution is to run at least 1/2 tank or better to avoid this.
The extra urge from the LSD differential I just installed allowed a bit more speed and since I have replaced all the fuel lines at the tank to cure a fuel leak I can now run with more fuel in the tank. The carb is a stock Nikki.
I will also try 5 degrees more ignition timing and the "wire tie" mechanical secondaries to improve low RPM response. I have removed the secondary spring and can feel the secondaries open then close back down until the RPMs build when they open again.

Jeff20B

iTrader: (13)

The mechanical secondaries effect mid to high RPM more than low RPM.