Drag racing my 2001 Proton (also: VX weight)

[Leon R]

I looked over the factory fuel system and I think I understand what is happening here: even through, stock FPR is meant to work off vacuum, this type of FPR is capable of using boost to actually increase the fuel pressure! It isn't necessary designed to do this, but it can do an OK, be it not very reliable, job at it.

I guess being at only 5-6 psi, keeps it "safe enough".

This is all coming together... I might have to start a Rear Mounted turbo thread

[WormGod]

Right enough. The fuel is injected under pressure and the pressure determines the dump. It is not ideal on the VX with the blower, but it does work well enough. On heavy drops, I will catch a whiff of some fuel but never anything to worry about. I think a different pulley or higher vacuum blower, and you would get enough fuel dump to cause worry.

Ideally, you would want to consider a more economic system. Larger injectors, actuating fuel rails and pump, etc.

But, for a Sunday car for me, it's well enough now. Besides, there is nothing like going WOT on the merge lane on a highway and hearing that jet plane "whirring" sound from the blower and intake. The VX gets attention as is, but when it sounds like THAT.... oh yeah....