A few things. Are you running a sniper tank or another baffled tank?

If it's not baffled it will starve the pump (which by the way would never support 1200hp). Probably at absolute best 750hp with forced induction.

Should test that it does in fact have proper voltage (and an excellent ground).

If it's a sniper module, the one I bought had a very small orifice on the outlet port which I drilled oversize. (not to mention it's a hard 90deg turn).


Another common mistake I see is running the feed -through- the regulator rather than the feed directly to rails and regulator on return side.

What are you using for an efi system and injectors? If you have a lot of injector overhead you can start out with a lower base pressure(say 43 instead of 60). That will increase injector duty cycle for a given power level but get you more out of the pump.