On a 12 valve, at what point (hp level) do we need to upgrade to an after market fuel system, fass etc... What kind of hp will the stocker handle?

 

Any guesses?

 

you won't run out of fuel with the stock mec. pump.

 

600

 

500

 

Around 700hp with a 12mm pump mine started dropping the fuel pressure down into the low teens. When i switched to the 13mm pump it drops it down into the low teens with a little over 1/2 throttle. I have a 200gph Fass on a toggle switch that i turn on when i am going to play. The rest of the time I run off just the mechanical pump.My guess would be around 650 or so.