While I was scanning through the corvette forum board, I came across this post:
NEW, The Best in tank fuel pump, denso kyosan 390lph @ 40psi - Corvette Forum
Kyosan p/n 895091-0810
This gives us another option for an in-tank pump. While not the most powerful in-tank pump, it is a step up from the Walbro 340/0169, RA XP+, Denso, and maybe the Bosch 044.
I have not tested this pump nor do I know of anyone that has, just going off of the numbers posted in the thread.
It sounds like the only roadblocks (other than fitting it in the tank) are price and availability. But I'm sure some ambitious/industrious type could find out the particulars
I place it in order among the others (judging from plotting it's output on a graph with these):
Pierburg (external) > Apexi BNR-32 skyline > Bosch 413 in-tank > Kyosan -0810 > Bosch 044 in-tank > Denso -1020 supra > Red's XP+ > Walbro 340/0169
NEW, The Best in tank fuel pump, denso kyosan 390lph @ 40psi - Corvette Forum
Kyosan p/n 895091-0810
This gives us another option for an in-tank pump. While not the most powerful in-tank pump, it is a step up from the Walbro 340/0169, RA XP+, Denso, and maybe the Bosch 044.
I have not tested this pump nor do I know of anyone that has, just going off of the numbers posted in the thread.
It sounds like the only roadblocks (other than fitting it in the tank) are price and availability. But I'm sure some ambitious/industrious type could find out the particulars

I place it in order among the others (judging from plotting it's output on a graph with these):
Pierburg (external) > Apexi BNR-32 skyline > Bosch 413 in-tank > Kyosan -0810 > Bosch 044 in-tank > Denso -1020 supra > Red's XP+ > Walbro 340/0169