If you,re referring to the Aeromotive 340 that they sell,it will be enough. Keep in mind,if you install a pump that has an output higher than 255 LPH,you will likely have to replace or modify the fuel return line as it will not be able to return enough fuel to the tank during low speed operation. This will result in high fuel pressure at low engine demands. Because of this I recommend Red Armstrong's double pumper. It will also take you farther into the future than a single in tank. You'd just install the pump with no mods and be done.
Do you understand that you'll probably have to modify your return line at the minimum. Using a hotwire will increase the flow at an idle which will overpower your return line even more. You can wire the hotwire in such a way that it could be activated at a certain boost level when the motor is using more fuel.
If you have any type of fuel pressure issues please converse with a tech in our support forum before entertaining any ideas put forth on TB.
It sounds like you are saying that adding a hobbs switch is just another item that can fail and the least number of parts in a system means less chance of a failure. Is this the point you are trying to make? When you say that adding extra voltage to the pump at a specific time voids the warranty it sounds like you are saying that adding the voltage in this way could damage the pump and supplying the extra voltage continuously wouldn't. If this is true,could you explain how this could hurt the pump.
