[toypro]

At around what RWHP level do the mkivs need an upgraded fuel pump?

 

[smokn u]

i dont think its the rwhp you should be worried about. i think its how much boost you plan on boosting.

 

[[3L]]

The best way to confirm this is with a fuel pressure gauge and not go by hocus pocus.

At around what RWHP level do the mkivs need an upgraded fuel pump?

 

[gritsak]

ANYWAYS...

stock pump will flow enough for around 500rwhp. at that point you will need more then just an upgraded pump though, you'll need bigger injectors, rail, lines, ect on a supra.