Nissan 370Z Forum - View Single Post - Fuel Starvation revisited

Robert Yuras · 01-02-2015, 09:03 PM

Yes, I know this is a topic that has been beat to heck, a million times. I know there is the CJ fuel pump upgrade kit available (for $1100) to remedy the starvation issue. I've researched the pump and seen how it works (very nice product and clearly works).

I'd like your input on a walk through as to what happens to make the car starve, as I have not had it occur.

It is to my best knowledge that the starvation occurs when fuel is sloshed over to the opposing side of the tank (away from the pick up), during long (high G) sweepers; with the issue becoming more prevalent as the fuel level becomes lower; thus allowing the car to go lean and move into limp mode. Is this correct? Or is the issue with the pump itself?

I've worked on circle track and road race cars for about 15 yrs now and fuel starvation is obviously an issue. However, there are many old ways of curing the issue that I believe are considerably more cost effective. For years we've been using trap doors, foam, movable pickups, and black boxes to solve all of these issues. Why is the Z so different? Since 2006 I've done Vettes primarily and they have saddle tanks too, but use a transfer system to keep the tanks at a constant level.

Any input and tank pictures would be appreciated. If anyone has cut one in half, that would be great to see also.

01-02-2015, 09:03 PM	#1 (permalink)
Robert Yuras Base Member Join Date: Aug 2014 Location: Texas Posts: 99 Drives: 2013 Nismo 370Z Rep Power: 11	Fuel Starvation revisited - help me understand Yes, I know this is a topic that has been beat to heck, a million times. I know there is the CJ fuel pump upgrade kit available (for $1100) to remedy the starvation issue. I've researched the pump and seen how it works (very nice product and clearly works). I'd like your input on a walk through as to what happens to make the car starve, as I have not had it occur. It is to my best knowledge that the starvation occurs when fuel is sloshed over to the opposing side of the tank (away from the pick up), during long (high G) sweepers; with the issue becoming more prevalent as the fuel level becomes lower; thus allowing the car to go lean and move into limp mode. Is this correct? Or is the issue with the pump itself? I've worked on circle track and road race cars for about 15 yrs now and fuel starvation is obviously an issue. However, there are many old ways of curing the issue that I believe are considerably more cost effective. For years we've been using trap doors, foam, movable pickups, and black boxes to solve all of these issues. Why is the Z so different? Since 2006 I've done Vettes primarily and they have saddle tanks too, but use a transfer system to keep the tanks at a constant level. Any input and tank pictures would be appreciated. If anyone has cut one in half, that would be great to see also.