The fuel cell I have from Fuel Safe does have a return port. I dont use it...as it is not needed on my car...but it is there. I had them put it in in case I ever put a Zetec in my car. All i would have to do is put a swirl pop and a higher compression pump up front and that would allow me to put in a zetec. the tank would have to have a line back from the front. I dont know if I would have to seal the tank (I currently have it vented) from outside air.
The sturdier tank is not any safer. From what I understand, and I may be wrong as I am not an expert on this...is that what happans is the rapid compression of the gasoline and vapor and the ramming of same across the open spaces of the tank (without foam) is what causes explosion of the tank. Basically all the cell is meant to do it stop that motion and ramming. It is supposed to give you enough time to get out of the car. it may leak...but it is not supposed to explode.
2005 Elise Ardent Red, www.lotusowners.com
LOONY (Lotus Owners of New York) and the Church of the HolyLotus, Drive Fast Take Chances, 93 Caterham 7, 71 Elan, 70 Elan GTS, 1991 M100, 1999 Sport 190 Elise, 1974 Europa TC, 1973 Europa JPS #15 TwinCam.