Love This

[Greg Hermann]

>Does anybody use a PWM fuel pressure regulator? Or know more about the
>part referenced here?
>http://efi332.eng.ohio-state.edu/diy_efi/archive/archive_num_88;lines=6114-6151
>
> How about the aftermarket systems that come with tc/sc?   It just
>seems funny to me to use mechanical regulators and vary pump speed,
>instead of maintaining constant pump speed/volume and adjusting
>regulated pressure.  It seems so simple, and no one does it, that
>there must be a "catch".
>
>Shannen

By now you prolly read my post on the subject. If you're doing nothing
else, put a #$%ing float vent on the high point of the rails. This will
cure vapor in the rails INSTANTLY!! And pump control in combo with a good
PR WILL give more accurate control. Variable pumping WILL work alone, but
not as well as in combo with a regulator (set up with pri/sec control). 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
>> >