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[Greg Hermann]

>Get em Ward.  Has anyone calculated the vapor pressure @ 200 degrees and
>compare
>it with the fuel pressure.  I don't think we have a problem... And if we do,
>IMHO it should be solved with a tiny jet in the return line.    Regards  Tom

A tiny jet would work, but you are dealing with several different boiling
components in the fuel, some of them pretty damn low, particularly in
winter blends. It IS a real issue, particularly under high sustained loads,
as in climbing a long grade with a trailer, etc.

Regards, Greg
>
>Ward Spoonemore wrote:
>
>> I think you should check the temp of your fuel after about 30 minutes
>> running it should be 20- 30 deg less than the coolant temp, remember most of
>> the fuel is being returned (hot) to the tank at normal driving, The major
>> problem is keep the pump from running dry and tearing up the pump.
>>
>> The "no return" systems came into favor as a result of more restrictive
>> rules on evap system's. If the fuel isn't returned to the tank the vapor
>> pressure is much reduced because the fuel is no at ambient temp, (except for
>> bone head door stop Camaros that have the tank in top of the muffler).
>>
>> Ward