Love This

[Shannen Durphey]

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
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
> >