Love This

[Greg Hermann]

>For what it is worth, no one seems to have mentioned (or else I missed the
>post) that many "in the tank" fuel pumps rely on the gasoline in the tank to
>cool the pump and need at least 1/4 tank of gas to do this properly.
>
>If I had a vapor problem, I would at least eliminate this as a possibility
>by topping off my tank every time that it went below 1/2 and see if the
>problem went away.  Particularly if the problem seems to be aggravated by a
>near empty tank as one post mentioned.
>
>Even a pump external to the tank, can be affected by other heat sources ,
>lack of adequate air flow, etc. but would most likely not be affected by the
>low fuel level.

Yep. I kinda believe in running either the fuel supply line, the return
line, or both through little coolers like those meant for cooling power
steering fluid so as to help with this too. If you keep adding heat to
something, it's gotta go somewhere!  :-)

Regards, Greg
>
>
>----------
>>From: Clarence Wood <clarencewood at centuryinter.net>
>>To: diy_efi at efi332.eng.ohio-state.edu
>>Subject: Re: Love This
>>Date: Fri, Jan 29, 1999, 11:17 PM
>>
>
>>Thanks Greg!  I think you have put your finger on a problem that I have
>>been having.  Please elaborate on the float vent; on what junk cars can I
>>remove one and where do I look for it on the car?
>>
>>At 02:01 PM 1/29/99 -0700, Greg wrote:
>>(snip)
>>>But
>>>if you are doing variable pumping alone, for $#% sakes, use a float vent on
>>>the rails, so as to get the #$#% bubbles back to the tank!!!
>>>
>>>Regards, Greg
>>>
>>>
>>>>Bruce Plecan wrote:
>>>>>
>>>>> -----Original Message-----
>>>>> From: James Weiler <james at brc.ubc.ca>
>>>>> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>>>>> Date: Friday, January 29, 1999 1:07 AM
>>>>> Subject: RE: Love This
>>>>>
>>>>> For me it's not the plumbing that is the "news".  It's being able to
>>>>> manipulate
>>>>> fuel line pressure without needing a mechanical device.  As things sit now
>>>>> for TPI the fuel pressure is referenced to engine vac/boost.  With this
>>>>> device
>>>>> a closed loop electrically controlled Fuel pressure trimmer is possible,
>>>>> meaning
>>>>> big injectors, lower pressure at idle, to help get reasonable pulse
>>>>>widths.
>>>>> Bruce
>>>>>
>>>>> >Sorry to get in this late but so what?  I mean whats the advantage of >a
>>>>> one line EFI vs. 2 fuel line set-up?  Besides less plumbing.
>>>>> >thanks
>>>>> >jw
>>>>> >
>>>
>>>
>>>