probably the biggest problem with the raptor is it's a pump that is doing more pulling than pushing...
i'm thinking that's why the AD and Fass 150's are more efficient than the block mounted pumps on the same brands.
you have another issue then. there is no reason why it should not be able to maintain at least 15psi. how old is your fuel filter and are you using the stock canister?Well it already drops to 12 psi at wot that's without the co
p box on it yet it just makes me nervous that it will drop below ten with the box on there