what they said. personally, from what i've been reading it seems the marine 370's are more trouble then they are worth, IMO i'd dump them and get some decent injectors that are designed to run in your application. as said get a plate in it too. i don't know how much time you've spent tuning but spending some quality time with your AFC will make life easier for you. it might not necessarily add much if any power though.

how much boost are you running? your stock turbo can easily put out 35 psi and it's pretty cheap to make it do it.

 

They are the 370's from dieselnut motorsports. i have a 6 plate in my glove box but ive been racing alot recently so ive left it out. im workin on gettin some new injectors like the new era 435's or something bigger. The turbo is still stock. It hits 45psi easily. Im in the process of gettin me a h3tb to do a twins setup with. Once i get the time ill probly grind the plate down to a zero. i was just tryin to see if any yall had any tricks i hadnt seen to get a bit more fuel up on the top end with moddin the pump. It seems like like im runnin low on fuel twords the end of the track.

 

this has nothing to do with fuel but what gearing are you running maybe you are running out of gearing not fuel.