Entity Robert Fisher spoke thus: > In this case, restricting the flow too much through a pre-filter could cause > the pump to starve. That is very unlikely unless it happened in the dead of winter. What is more likely is that the pump would be pumping vapor as I already explained. But maybe the laws of physics are too obscure for some people and I am wasting my time. If you don't want your fuel to vaporize in a vacuum, use a heavier fuel (diesel). -- Gnarlie
>>> It so happens that gasoline is very volatile. >> >> You know, I have always suspected that was true <g> >> >>> Most people would prefer the pump breakdown sooner than a sudden vapor > lock on >>> a hot day. >> >> Well, I am not sure that would be the consensus, as one stops you from > going, >> the other stops you from going, and also costs you hundreds of dollars, > but I >> didn't bring it up to be argumentative. It just makes little sense to have > two >> filters in the same line, and as long as you are using a filter, it is > logical >> to put it ahead of the pump and protect it, as well as the rest of the FI >> system. >> >> Judging from what I have read today, Some vans came with a filter in > front, some >> with the filter downstream, and some with both. I respect the VW > designers, but >> it appears that they could simply not make up their minds with regards to > what >> is best, so I guess we are left to our own opinions and logic. >> >> If one has a second filter, it ought to really last a lifetime if there is > the >> smaller one upstream. >> >> Thanks, >> >> John |
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