simple question about fuel press. regs.

[Bruce Plecan]

-----Original Message-----
From: TWright669 <TWright669 at aol.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, March 31, 1998 2:25 AM
Subject: simple question about fuel press. regs.


>I am trying to build a basic theoretical fuel map but there is one thing I
am
>not all that confident about:  the effects of the fuel pressure regulator.
>There are two types:
>1. the constant pressure type, and
>2. the manifold pressure referenced type.
>I have the manifold reference type.
>My question is:
>Does the manifold referenced regulator inject the same amount of fuel per
>milisec. over the range of manifold pressures?  After all, for every 1 psi
>increase in manifold pressure there is 1 psi increase fuel pressure, which
>cancels out. Right?

That's been my experience


>A person who has a constant pressure fuel reg. has to do extra calcs. to
>figure in the effect of manifold pressure for the rate at which the
injector
>injects fuel, where as I dont have to bother.  Right?

I took a system that had a fixed FPR, and went to vac ref., and it
was easier to dial in, and much more stable for AFR

snip

>Thanks,
>Tom

Cheers Bruce