Exactly right - the pump pulse is small in volume and high in rate and would
not be detected by the pressure needle. That would be bad system design. Our
gauges do not vibrate 99+% of the time.
Robert N. Blair Yellow 65BJ8 RNBmail@yahoo.com
--- On Thu, 10/7/10, Herbert Miller <hgmiller3@qwest.net> wrote:
> From: Herbert Miller <hgmiller3@qwest.net>
> Subject: Re: [Healeys] Thread on oil pressure relief valve
> To: "'BJ8 Healeys'" <sbyers@ec.rr.com>, healeys@autox.team.net
> Date: Thursday, October 7, 2010, 7:59 AM
> Something to think about.
> The illustration of the gear type oil pump in my shop
> manual shows 7 teeth,
> thus 7 cavities between the gears per revolution.
> At 1000 rpm the pump gears rotate at 500 rpm, that's 3,500
> pulses per min.
> or almost 60 pulses per second.
> I do not think the gauge can respond to this frequency.
> Even if it could you
> could not see it. Tell me you can see the flicker of an
> Incandescent household light bulb.
>
> Herb Miller
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