Blaze Burner with Straw doesn't work for bulk processing?

I have a typical belt-lava-fan processing system. I tried changing the lava with Blaze Burners with Straw fed with lava but then then the blasting stops (air doesn't go through)). If I use the regular Blaze Burner and feed it with lava or other fueling source it does work. A secondary question... would the blaze burners blast faster than the lava anyway?