A well matched regulator and pump with plenty of reserve capacity should not
exhibit this problem. If you use low buck parts at their limit yes you can
have a problem. If you put it way upstream of the device you may not be
getting air out of the system. If the device is a nitrous solenoid you
engine may take issue with that. The key is to use a large pump and
regulator so you never get to more that 70% of rated capacity. be generous
with the line size as this will dampen a lot out as well. And yes they do
make dampers for high pressure fuel. Around $100 for damper and hardware.
Dave
> -----Original Message-----
> From: 3liter [mailto:saltfever@comcast.net]
> Sent: Monday, March 22, 2004 1:07 AM
> To: 'Dave Dahlgren'; land-speed submit
> Subject: Bypass regulator
>
>
>
> Thanks, Dave & Keith for the explanation. You mention that the
> regulator comes after the device. Which raise another question; what
> about a reversion wave or "water hammer" effect on the device? Since the
> regulator is down-stream of the device, and will shut on/of to modulate
> the pressure, some kind of wave should be traveling back up stream to
> the device. If the regulator was up-stream of the device (but still
> able to by-pass excess flow) wouldn't there be a more constant pressure
> to the device? Your thoughts?
> -Elon
>
> (snip.)The other way is to run from the pump to the device and continue
> on to a regulator that will send excess flow back to the tank and hence
> regulate the pressure. . . The regulator closes off the return flow to
> the tank as the device demands more flow and maintains the system
> pressure. . . . the only non linearity you can get in this system is if
> the pump capacity is much more than the regulator. Then the pressure
> will creep up until demand from the device also uses some flow capacity
> as well.
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