Engine dying on hard stops - SOLUTION

[Bren]

So, there are many threads about carbed engines dying if you brake too hard. Generally, the consensus is that gas from the rear bowl is being pushed to the front of the rear bowl and spilling into the engine, thereby flooding the engine. This is usually (semi) confirmed if you keep the gas pedal down a little while braking.

Anyway, most of the solutions suggested on the other threads required installing pick-up extenders in the fuel bowls, placing rubber tubing across tubes on the carb, etc. which seemed like overkill. After all, the carbs we are using now-a-days are meant for extreme conditions, including extreme braking.

So, I emailed Quick Fuel (I have a Q-850 cfm) and his solution seemed much easier: set the fuel pressure to 6 psi and set the float level of the rear bowl so that the gas line is right at the bottom of the sight glass. (On the Quick Fuel and other carbs the float level can be adjusted without removing the carb or removing parts of the carb.)

I did that, and now my engine does not stall when I slam on the brakes. Easy.

I thought I'd post this for others searching the forum for a solution and don't want to break open their carb to find a solution.

[CraigS]

That certainly makes sense. And since the secondary comes in only at higher throttle openings any other effects could be taken care of, if needed, w/ jetting.