100 cfm more with anular and downleg boosters can't beat AFR

Hysteric said
I think part of the issue is you don't have enough compression for the cam you're running but I think you already know that. Have you thought about advancing the cam to build more cylinder pressure? It's free

Probably right. I had thought about whether advancing might help but that got rotated to a back burner. I really spend time building an engine that will let me drop into a more stock SCCA autocross class. Really never thought I'd still be running this engine! Those headers and the timing changes did make it fun to drive so no regrets.

Hysteric said
Another thing that has occurred to me is the vacuum spivy is very close to the booster so maybe it could be affecting the air flow nearest the booster? Could that be causing a change in fuel distribution. Also as the airflow is faster in that area is that affecting the vacuum response to the vacuum pod. Just thinking aloud here.

I suppose its possible but wouldn't the volume of air effected be pretty small compared to a notch or spivy on the booster itself?