carb stalling under braking - easy solution

[menostig]

I think...

My carb'd chevy has stalled about 5 times on the road. Typically either because I just shot past loads of traffic on a dual carriageway and then braked hard into a roundabout and there was more traffic than expected and I had to hard stop... and the engine also stops... and all the stuff I've overtaken goes round me on the inside wondering why the dork doesn't pull away. Or because I've had to emergency stop for something like a tractor pulling out (it's Suffolk you see).

But on the track, despite all the big protracted stops, this carb-stall problem has never happened. Got me thinking. One difference is on the track you don't come to a complete standstill, but I don't think the carb knows that.

The only difference I can think off is that in the unplanned road stop situations, I'm not heel & toeing. Whereas on the track I definitely am. Perhaps the blip pulls through enough fuel to prevent the stall.

Can that be the answer ? Well it works for me.

regards
Roger

[ramthorne]

I would say it's almost certainly fuel slosh flooding the engine.

If you're on a Holley they do a vented pipe that goes between the float chambers to help reduce this. It's usually used in off road situations.

[tuxman]

menostig, some of us had the same problem last year we found a wedge plate to level up the carb improved things ,does it tip forward at the moment ? simon

[YIIHAA]

Have you tried pressing the pedal on the left when you come to a stop

[stig]

ramthorne said:

I would say it's almost certainly fuel slosh flooding the engine.

If you're on a Holley they do a vented pipe that goes between the float chambers to help reduce this. It's usually used in off road situations.

Yup. It's easy to make a pipe to do this too - but make sure it's fuel and heat resistant!

[menostig]

Yep, carb is wedged up, and yep I do bury the clutch pedal as well as the brake pedal. In 3000 miles it's only happened 5 times.

Heel & toeing - ain't it great !

[tuxman]

in that case i would say its the hot weather do you know what temps you are getting under clip ? simon