Hello,

I have been reading through alot of other threads on the internet. there are many threads with similar questions and a few threads I found with this exact question but they are now broken links (or cant be opened on my pc due to network security).

maybe I am just reading the wrong threads but I cannot seem to get a solid 100% sure answer.


How much rwhp can be supported by a stock 2005 GT 4.6 3v pump fuel pump (not a 5.0 fuel pump) in a turbo setup?

From what I understand the 39# injectors should not have any problem keeping up, its the pump that I am not 100% sure on so I am trying to find some confirmation.

this will not be a SC setup. it will be a turbo setup (as you know a SC setup is robbing power so fueling for 450rwhp in a sc setup is actually demanding more fuel than 450rwp in a turbo setup)

no mods to the pump, no boost a pump. just a stock 05 GT fuel pump and stock wiring with 39# injectors.

If this has been answered somewhere else please feel free to delete this thread and send me a link.

I just need to know for sure if my stock pump can safely fuel up to 450rwhp without any other fuel system mods aside from the injectors.

I doubt I would ever be full throttle long enough to be making 450whp on the daily commute, but I need to know that the 0.0001% of the time that I do have some fun and the requirement for fuel flow comes up that the stock pump can support it.

I believe the more basic Roush SC kits with pulley upgrade are making similar power with just the injectors which makes me think I will be fine, especially without the drag of the SC increasing fuel requirements.


Thank you.