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[Greg Hermann]

>> >I know Toyota uses the system in the 1ZZ-FE and claims lower evap
>> >emissions as the reason, FWIW. Less vapor lock?

Keeping the fuel in the tank cooler keeps its vapor pressure down, and
helps reduce evap emissions. Yes, keeping the tank cooler also provides
more net positive suction head (NPSH) to an in line fuel pump, but it does
nothing to help with keeping fuel vapor out of the fuel rails during
hard/hot running or after a hot soak.

With no bypass fuel flow, this second problem WILL be worse.

Greg
>>
>> DO NOT let mfgr BS about less evap emissions get confused with getting the
>> vapor bubbles out of the fuel rails!!!
>>
>The evap. test has been increased from 1 hr to 3 days so is more
>difficult to past.  Does any one know where i can get a low
>permeation fuel neck hose?
>alex