[sen2two]

350+ will require a lot of fuel. I made 409whp on an older TII of mine with a 255lph fuel pump, 720 primaries and 1680 secondaries at 14psi. The only reason it stopped there was because there wasn't enough fuel to go any further. Now the injectors them selves were good until a little over 500, but what are you doing for a fuel pump?

Also, with stock primaries and only 720 secondaries... your pushing it at 300whp. and pushing it hard. Anything over 80% duty cycle on your injectors is not a good thing. So just because you can run them at 90 or 100% duty cycle with a standalone, but that dosn't mean you should.

I would at a minimum, get 1000cc secondaries for a 350whp goal. But that's only because I use methanol as an additive. Without any AI, just get some 1680's Bosch style. they drop right in to the stock fuel rail.