Thread: Can I tune out this bog?

Tweet

I'll try the silver bushing in the dist but that still puts me at 8* on the crank when I'm running the pump gas... Are you saying I'm running too retarded and this contributes to the bog? I've dialed the timing in for the various fuels I use based on the heat pattern I see on the ground strap of the plugs... when running 100 octane (what I usually run at the races) I'm running 35-36* total timing.... come to think of it though sometimes I'll start the day with a 75-25 or so mix of 100 and 91 and run 35* advance, but later in the day I add straight 100 and leave the advance where it's at. Would a few points (say from effectively 96 to 99) octane at the same spark lead be playing a role in this?

I had the tube type nozzles on my old 750 and they squirt right into the center of the downleg boosters. The boosters on this 0-9380 carb are the large annular variety and sit up so much higher in the venturis the tubes would be aimed toward the bottom of the booster so I'm not so sure the tube nozzles will help as much in this case(?)... Here's a pic: