John,
Have you checked against a calibrated gauge (or had your own
adjusted/calibrated)? My BJ8 showed zero pressure at idle when I bought
it, but having the safety gauge adjusted 'added' 15-20psi at idle.
Bob
On 1/1/2020 10:27 AM, John Spaur wrote:
> My '62 BT7 has a stock oil pump and the indicated oil pressure always reads
> very low, 20 psi if I recall correctly, when the engine is up to operating
> temperature. I think this has been an issue with the car and a discussion
> topic for eons. I have never experienced a problem or issue with the oil
> pressure or the value stated on the gauge. Are people experiencing engine
> issues because of this?
>
> John Spaur
> San Jose
>
> -----Original Message-----
> From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Larry
> Varley
> Sent: Tuesday, December 31, 2019 9:03 PM
> To: healeys@autox.team.net
> Subject: Re: [Healeys] Oil Pumps
>
> As a matter of interest the rotary oil pump is from the Austin A70 2.2 litre
> engine, same rotor. Then when the 2.6 litre engine was produced for the
> Healey 100 Austin changed the pumps to the gear type. Probably because the
> gear type pumps less oil and they knew the cars would be revved harder. In an
> A70 and 100 engine the rotary pump will produce up to 80 PSI oil pressure and
> around 3000 engine revs, where the gear pump will produce about 60 PSI with
> the same bypass spring. This shows the rotary pump has a far greater output.
> Austin may have changed the pump running speed when they fitted the rotary
> pump to the six cylinder cars, I don't know. Austin A70's have no problem
> with 80 PSI oil pressure, but then we all know the 6 cylinder engine was an
> inferior design :)) Cheers Larry Varley
> _______________________________________________
>
>
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