PMO carbs need float bowl baffles for racing like Webers?

[stownsen914]

I've heard for years that for racing, Webers need baffles in the float bowls to keep fuel over the pickups during high G forces.

Do PMOs need this as well? I am troubelshooting an engine stumbling condition immediately after hard braking and wondered if it could be a fuel pickup issue.

[911 SLANT]

I was just test driving my car yesterday and at 60mph I locked up brakes a few times and released to full throttle. No hesitation or stumbling with my 46mm PMOs.

[Walt Fricke]

The Webers have the opening to the main jet on one side of the float bowl. The slosh plates effectively move that to the center of the bowl, so the opening is not uncovered under hard cornering. My understanding is that the PMOs moved the passage to the center of the bowl, so no plates needed (just like moving the jet stack to the top, and building in a float level glass window - correct Weber issues). So you don't need them on PMOs.

And starvation after hard braking wasn't among the issues people had with Webers. Never an issue with mine, and I raced the car so lots of hard braking.

[Mark Henry]

PMO's have the Weber IDF float bowl design and IDF floats which are superior in rough handling and off-road than the IDA bowl/float design.
But the IDF bowl is harder to set the fuel level, so one of the reasons they put in the sight glasses.

[stownsen914]

Thanks guys. I hadn't heard of the PMOs requiring the baffles, but wanted to check while I have stuff apart.

When I get on track again, I'll have a wide band O2 on it and will try to trace the stumble to a lean or rich condition as a next step.